identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
9327592FF42E1957FD701DFBFEC15263.text	9327592FF42E1957FD701DFBFEC15263.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Rineceras Hyatt 1893	<div><p>Genus Rineceras Hyatt, 1893</p> <p>Type species</p> <p>Gyroceras propinquum de Koninck, 1880; subsequent designation by Foord (1900).</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with evolute conch; whorls detached or slightly in contact; whorl profile elliptical or rounded-triangular with broad venter. Ornament with coarse growth lines and fine or coarse spiral lines; coarse granulation at the crossing points of growth lines and spiral ridges. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended by Korn et al. 2022).</p> <p>Included Early Carboniferous species</p> <p>Rhineceras alapaevskensis Kruglov, 1934, Urals; Pararineceras balladoolense Turner, 1954, Isle of Man; Nautilus canaliculatus von Eichwald, 1857, South Urals; Rineceras carinatiforme Shimansky, 1967, Kazakhstan; Nautilus carinatus von Eichwald, 1857, Western Russia; Nautilus (Discus) digonus Meek &amp; Worthen, 1860, Indiana; Nautilus Luidii Fleming, 1828, Derbyshire; Gyroceras Meyerianum de Koninck, 1844, Belgium; Rineceras multituberculatum Korn, Miao &amp; Bockwinkel, 2022, Algeria; Rineceras ohioense Miller &amp; Garner, 1953, Ohio; Triboloceras patteiskyi Schmidt, 1951, Rhenish Mountains; Gyroceras propinquum de Koninck, 1880, Belgium; Rineceras rectangulatum Korn, Miao &amp; Bockwinkel, 2022, Algeria; Nautilus rhenanus Holzapfel, 1889, Rhenish Mountains; Rineceras tenerum sp. nov., Algeria.</p> <p>Remarks</p> <p>Due to differing opinions on the significance of the general shape of the conch, there is disagreement on the species spectrum of the genus Rineceras. Turner (1953) revised the species originally described by Martin (1793, 1809) as “Conchyliolithus N. Ammonites (Luidii)”, and subsequently, he introduced the genus Pararineceras on the basis of this species (Turner 1954). This species differs from the type species of Rineceras only by the more densely coiled conch and the supposed “straightening out in late maturity”. The first of these two characters might be gradual and not useful for a separation of genera and the second cannot really be demonstrated in the holotype, which has a conch diameter of only 28 mm.</p> <p>Kummel (1964) accepted both genera without providing clear distinguishing characters, but Shimansky (1967) and Dzik (1984) regarded Pararineceras as a synonym of Rineceras. In the following, we treat Pararineceras as a junior synonym of Rineceras until a clear separation can be demonstrated.</p> <p>Rineceras is restricted here to those species that have a whorl profile with a rounded outline. This means that the species Nautilus (Trematodiscus) Meekianus Winchell, 1862 and Nautilus (Trematodiscus) strigatus Winchell, 1862, both with longitudinal grooves on the venter, placed in Rineceras by Miller &amp; Garner (1953), are excluded from Rineceras and listed in the new genus Stroborineceras gen. nov.</p> <p>Rineceras belongs to the ancestral Early Carboniferous genera in the evolution of the nautilid family Trigonoceratidae. This is supported not only by the early stratigraphic occurrence in strata of the early late Tournaisian, but also by the morphology with a rather simple overall whorl profile without the longitudinal grooves and ridges often present in many derived forms, which there lead to a more complex geometry.</p> </div>	http://treatment.plazi.org/id/9327592FF42E1957FD701DFBFEC15263	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF42F1955FD7D1D20FD8854C5.text	9327592FF42F1955FD7D1D20FD8854C5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Rineceras tenerum Korn & Bockwinkel 2022	<div><p>Rineceras tenerum sp. nov.</p> <p>urn:lsid:zoobank.org:act: 94410544-F569-471D-A008-97466EB83BBF</p> <p>Figs 4–5, Table 1</p> <p>Diagnosis</p> <p>Species of Rineceras with weakly depressed, rounded-trapezoidal whorl profile (ww/wh ~1.45), venter slightly flattened, ventrolateral shoulder broadly rounded. Whorls not embracing. Ornament with a few spiral lines on the flank and the venter.</p> <p>Etymology</p> <p>From the Latin ‘ tenerum ’, meaning ‘tender’ and referring to the comparatively delicate spiral lines.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-Z); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 4A–B; MB.C.30440.1.</p> <p>Paratypes ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-E07); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002Coll.; illustrated in Fig. 4C; MB.C.30441 • 8 specimens; Mouydir, south of Oued Temertasset (localities MOU-Z, MOU-C5, MOU-B1, MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30440.2, MB.C.30442, MB.C.30443.1–MB.C.30443.2, MB.C.30444.1–MB.C.30444.4.</p> <p>Description</p> <p>Holotype MB.C.30440.1 is a haematitic internal mould consisting of two fully chambered segments; however, some chambers between the two segments are missing (Fig. 4A–B). The total diameter is about 49 mm. At this diameter, the whorl profile is rounded-triangular with a somewhat flattened venter and continuously rounded dorsum. There is no overlap upon the previous whorl (Fig. 5A). On the flanks and the outer part of the venter, there are twelve spiral lines on each side. The suture line shows a low amplitude; there is a wide, shallow external lobe and a low, tightly rounded ventrolateral saddle. On the flanks and dorsum the suture line is almost straight (Fig. 5B).</p> <p>The segment of the younger stage (Fig. 4B) shows the conch dimensions and proportions better. The conch is evolute at 28 mm diameter (uw/dm =0.48). The whorl profile is similar to the large segment, but the venter is slightly more flattened and the ventrolateral shoulder is more pronounced with a very shallow submarginal ventral groove (Fig. 5C). From the margin of the venter and on the flank, there are about 12 spiral lines. However, it can be seen that the number of spiral lines decreases during ontogeny; over a distance of 180 degrees, the initially coarse spiral lines in the submarginal area of the venter become weaker gradually. The siphuncle has a position slightly off centre on the ventral side. The suture line shows a broad and shallow external lobe and a very shallow lateral lobe (Fig. 5D).</p> <p>Paratype MB.C.30441 closely resembles the holotype but has a slightly more pronounced ventrolateral shoulder (Fig. 4C). The large unfigured paratype MB.C.30442 has, at a whorl height of 21 mm, a whorl profile almost identical to the holotype; it also possesses twelve coarse spiral lines on the flanks and the outer part of the venter.</p> <p>Remarks</p> <p>The species of the genus Rineceras can be divided into different groups according to various aspects: general conch shape (whorls detached or embracing), whorl profile (depressed oval, rounded-triangular or trapezoidal), formation of the ventrolateral shoulder (rounded or angular), spiral ornament (spirals equally strong or differently strong) etc.</p> <p>Rineceras tenerum sp. nov. differs from all other species of the genus by the combination of rather weak spiral lines that are restricted to the flank, the non-embracing whorls, and the whorl profile with a rounded-triangular outline.</p> </div>	http://treatment.plazi.org/id/9327592FF42F1955FD7D1D20FD8854C5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF422195AFD9C1F44FB135746.text	9327592FF422195AFD9C1F44FB135746.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroborineceras Korn & Bockwinkel 2022	<div><p>Genus Stroborineceras gen. nov.</p> <p>urn:lsid:zoobank.org:act: AA852A1D-1B99-4B73-A82E-24CC0BADB162</p> <p>Type species</p> <p>Stroborineceras insalahensis gen. et sp. nov.</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with evolute conch; whorls not embracing; whorl profile depressed and rounded-triangular (escutcheon-shaped) with flattened or weakly concave venter and pronounced ventrolateral shoulders. Ornament with some spiral ridges on the flank, sometimes also on the margin of the venter. Suture line with broad, shallow external lobe and narrowly rounded ventrolateral saddle. Siphuncle small with subcentral position slightly shifted towards the venter.</p> <p>Etymology</p> <p>A combination of the two genus names Stroboceras and Rineceras, because of the presence of characters of both genera in the new genus.</p> <p>Included species</p> <p>Stroborineceras insalahensis gen. et sp. nov., Algeria; Stroborineceras felis gen. et sp. nov., Algeria; and questionably Nautilus (Trematodiscus) Meekianus Winchell, 1862, Michigan and Nautilus (Trematodiscus) strigatus Winchell, 1862, Michigan.</p> <p>Remarks</p> <p>Stroborineceras gen. nov. combines the morphological features of the apparently ancestral genus Rineceras (simple whorl profile and spiral lines on the flank) and descendant genera such as Stroboceras or Vestinautilus (pronounced ventrolateral shoulder with sharp longitudinal ridges and submarginal ventral grooves).</p> <p>Stroborineceras gen. nov. differs from Rineceras in the more pronounced ventrolateral shoulder, which is reinforced by some raised longitudinal ridges, whereas in Rineceras it is rounded. In addition, the submarginal ventral longitudinal groove, which in Rineceras is only present on the juvenile stage, is still distinct in Stroborineceras gen. nov. in the middle growth stage.</p> <p>Stroborineceras gen. nov. differs from Stroboceras and Vestinautilus in the absence of the strong longitudinal ridges and broad longitudinal grooves that cause a polygonal whorl profile in these two genera. Instead, Stroborineceras gen. nov. merely has spiral lines on the flanks.</p> </div>	http://treatment.plazi.org/id/9327592FF422195AFD9C1F44FB135746	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4221958FDD4180EFA87542A.text	9327592FF4221958FDD4180EFA87542A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroborineceras insalahensis Korn & Bockwinkel 2022	<div><p>Stroborineceras insalahensis gen. et sp. nov.</p> <p>urn:lsid:zoobank.org:act: F19AF373-B30D-4DCA-ADDE-C0C2678A753F</p> <p>Figs 6–7, Table 2</p> <p>Diagnosis</p> <p>Species of Stroborineceras gen. nov. with depressed, rounded-triangular whorl profile (ww/wh ~1.50), venter strongly flattened, ventrolateral shoulder subangular with sharp longitudinal ridges. Whorls not embracing. Ornament with fine spiral ridges in the submarginal ventral position; five or six spiral ridges are located on the flank.</p> <p>Etymology</p> <p>Named after the town of In Salah in the central Sahara Desert.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-E07); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 6B; MB.C.30445.1.</p> <p>Paratypes ALGERIA • 2 specimens; Mouydir, south of Oued Temertasset (locality MOU-E07); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 6A, C; MB.C.30445.2 – MB.C.30445.3 • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-D2); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 6D; MB.C.30446.1 • 18 specimens; Mouydir, south of Oued Temertasset (localities MOU-D2, MOU-A, MOU-C5, MOU-D1, MOU-E06, MOU-V, MOU-Z); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30446.2, MB.C.30447.1–MB.C.30447.4, MB.C.30448.1– MB.C.30448.2, MB.C.30449.1–MB.C.30449.6, MB.C.30450, MB.C.30451, MB.C.30452.1– MB.C.30452.3 • 1 specimen; Sebkha de Timimoun 11 km south-west of Timimoun (locality TIM-B0); Grès de Kahla supérieur (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30453.</p> <p>Description</p> <p>Holotype MB.C.30445.1 is a whorl fragment of about 90 degrees angular length, consisting of the last chambers of the phragmocone and part of the body chamber (Fig. 6B). The maximum whorl height is 11 mm. The whorl profile is rounded-triangular and depressed (ww/wh = 1.51) with a flattened venter and an almost semi-circular area encompassing the flanks and dorsum (Fig. 7A); the ventrolateral shoulder is subangular. The specimen bears at least eight longitudinal lines, two of which are on the edge of the venter and six on the flank. The suture line shows a broad, almost semi-circular external lobe, a tightly rounded ventrolateral saddle and a shallow and very broad lateral lobe. On the dorsum the suture line shows an almost straight course (Fig. 7E).</p> <p>The paratypes illustrate that the variation is quite low; all specimens show very similar whorl profiles, ornament and suture line. Compared to the holotype, the paratype MB.C.30445.2 (Fig. 6A) has more strongly developed spiral lines on the flanks and the paratypes MB.C.30445.3 (Fig. 6C) and MB.C.30446.1 (Fig. 6D) show slightly more distinct submarginal ridges on the venter.</p> <p>Remarks</p> <p>Stroborineceras insalahensis gen. et sp. nov. differs from S. felis gen. et sp. nov. by the more depressed whorl profile (ww/wh = 1.55 in S. insalahensis gen. et sp. nov. but only 1.25 in S. felis gen. et sp. nov.), by the flattened or weakly convex venter (concave in S. felis gen. et sp. nov.) and by the considerably stronger spiral lines (weakly developed and absent on the venter in S. felis gen. et sp. nov.).</p> </div>	http://treatment.plazi.org/id/9327592FF4221958FDD4180EFA87542A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF421195EFD861F45FBB8527C.text	9327592FF421195EFD861F45FBB8527C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroborineceras felis Korn & Bockwinkel 2022	<div><p>Stroborineceras felis gen. et sp. nov.</p> <p>urn:lsid:zoobank.org:act: 406664D9-FD31-430B-8988-AD7510B6B36A</p> <p>Fig. 8, Table 3</p> <p>Diagnosis</p> <p>Species of Stroborineceras gen. nov. with weakly depressed, rounded-pentagonal whorl profile (ww/wh ~1.20), venter concave, ventrolateral shoulder angular. Whorls not embracing. Ornament with five faint spiral ridges located on the flank.</p> <p>Etymology</p> <p>From the Latin ‘ felis ’, meaning ‘cat’ and referring to the characteristic whorl profile resembling a cat’s head.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 8A; MB.C.30454.</p> <p>Description</p> <p>Holotype MB.C.30454 is a phragmocone fragment of slightly less than 90 degrees in length (Fig. 8A). It reaches a whorl height of 13 mm and the profile is weakly depressed (ww/wh = 1.22). The characteristic whorl profile has the outline of a cat’s head shape (Fig. 8B); its general shape is rounded-pentagonal. The venter is concavely incurved and is bordered by the very prominent, angular ventrolateral shoulder. The profile is widest at the middle of the whorl height; from here the flanks converge with a slight concave incurvation. The dorsum is broadly rounded. On the flank about five spiral lines are visible; they become weaker towards the dorsum. The suture line shows a deep, almost semicircular external lobe, a subacute ventrolateral saddle, a shallow, very broadly rounded lateral lobe and a very broad, low internal saddle (Fig. 8C).</p> <p>Remarks</p> <p>Stroborineceras felis gen. et sp. nov. differs from S. insalahensis gen. et sp. nov. by the less depressed whorl profile (ww/wh ~ 1.25 in S. felis gen. et sp. nov. but ~ 1.55 in S. insalahensis gen. et sp. nov.), by the concave venter (flattened or weakly convex in S. felis gen. et sp. nov.) and by the considerably weaker spiral lines (coarse and sharp in S. insalahensis gen. et sp. nov.).</p> </div>	http://treatment.plazi.org/id/9327592FF421195EFD861F45FBB8527C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF427195CFD671C6EFD7653CA.text	9327592FF427195CFD671C6EFD7653CA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroboceras Hyatt 1884	<div><p>Genus Stroboceras Hyatt, 1884</p> <p>Type species</p> <p>Gyroceras Hartii Dawson, 1858; by original designation.</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with discoidal, evolute conch; whorls slightly embracing, outer whorl may have lose contact with preceding whorls. Adult conch with a polygonal whorl profile; venter slightly convex, flattened, less often slightly concave, flanks almost flat or irregularly concave, dorsum slightly concave. Prominent longitudinal keels usually well developed, separated by concave zones. Suture line with small lobes and saddles reflecting keels and longitudinal grooves on the surface of the conch. Siphuncle small with subcentral position between septum centre and venter (after Shimansky 1967; emended).</p> <p>Included species</p> <p>Nautilus ammoneus Eichwald, 1857, South Urals; Stroboceras anglicum Hyatt, 1893, Yorkshire; Nautilus bicarinatus de Verneuil, 1845, South Urals; Stroboceras evansi Ramsbottom &amp; Moore, 1961, Ireland; Stroboceras gordoni Niko &amp; Mapes, 2005, Arkansas; Gyroceras Hartii Dawson, 1858; Nova Scotia; Coelonautilus humerosus Schmidt, 1951, Rhenish Mountains; Stroboceras intermedium Miller &amp; Garner, 1953, Michigan; Stroboceras mstense Shimansky, 1967, Moscow Basin; Stroboceras trifer Schmidt, 1951, Silesia; Stroboceras mane sp. nov., Algeria; Stroboceras ancilis sp. nov., Algeria.</p> <p>Remarks</p> <p>A systematic treatment of the morphologically diverse Stroboceras form complex is difficult and it is not clear what the relationships between the numerous species are. Turner (1954) introduced the genus Epistroboceras to separate the laterally compressed forms. These forms are supposed to differ from Stroboceras by the narrower coiling: Stroboceras should be tarphophioceraconic (i.e., with the last whorl detached), while Epistroboceras should be tarphyceraconic (i.e., with the last whorl in close contact with the preceding one).</p> <p>This distinguishing criterion was also mentioned by Kummel (1964), but Gordon (1965) pointed out that only the type species S. hartii has a straightened-out whorl at maturity. However, Miller &amp; Garner (1953) had already pointed out that the holotype of this species is “slightly crushed”. They also reported “… that the conch is coiled and is very slightly involute; though at full maturity the adoral portion of the body chamber straightens and loses contact with the preceding whorl but retains, however, the slight impressed zone.” (Miller &amp; Garner 1953: 134). This combination of characters is questionable; a concave whorl zone is practically always created by enclosing the preceding whorl. Therefore, it cannot be excluded that it is a preservation effect. Gordon (1965) accepted Epistroboceras only as a subgenus of Stroboceras, distinguished by the loss of longitudinal sculpture in late ontogeny.</p> <p>Shimansky (1967) discussed the relationship between the two genera in detail and concluded that the relationships and boundaries of the genera Stroboceras and Epistroboceras were not entirely clear. He considered it possible that, in addition to the whorl profile, the size of the umbilical window could also serve to distinguish between the two genera.</p> <p>Histon (1999) characterised the genus Epistroboceras, among other characteristics, by the strongly compressed conch, converging flanks and narrow concave venter. More recently, Niko &amp; Mapes (2004) discussed the relationship between Stroboceras and Epistroboceras; in distinguishing the two genera, they upheld the presumed detachment of the adult whorl in Stroboceras. As a further difference between the two genera, they mentioned that the “… lateral grooves developed in the juvenile stage become obsolescent with maturity” in Epistroboceras (Niko &amp; Mapes 2004: 341).</p> <p>The distinction between the two genera is an issue that cannot be solved with the material available from the Sahara Desert, it is beyond the scope of our investigations. For the time being, we follow the path suggested by Shimansky (1967) of grouping the forms with a broad venter under Stroboceras and those with a narrow venter under Epistroboceras.</p> </div>	http://treatment.plazi.org/id/9327592FF427195CFD671C6EFD7653CA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF424195DFD431C8AFE5E550B.text	9327592FF424195DFD431C8AFE5E550B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroboceras mane Korn & Bockwinkel 2022	<div><p>Stroboceras mane sp. nov.</p> <p>urn:lsid:zoobank.org:act: D423198E-EA1D-44F1-A1E3-C1E31F6FDC4E</p> <p>Fig. 10, Table 5</p> <p>Diagnosis</p> <p>Species of Stroboceras with weakly depressed, rounded-trapezoidal whorl profile (ww/wh ~1.45), venter strongly flattened, ventrolateral shoulder angular with sharp longitudinal ridges. Whorls not embracing. Whorl profile with wide longitudinal groove on the outer flank near the ventrolateral margin.</p> <p>Etymology</p> <p>From the Latin ‘ mane ’, meaning ‘early, morning’ and referring to the stratigraphically early occurrence of the species.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-Y); Argiles de Teguentour (Lower Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 10A; MB.C.30458.1.</p> <p>Paratype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-Y); Argiles de Teguentour (Lower Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30458.2.</p> <p>Description</p> <p>Holotype MB.C.30458.1 is a phragmocone fragment with about 22 mm conch diameter; it is partly embedded in a haematite nodule (Fig. 10A) and was sectioned for the study of the whorl profile. The conch is discoidal and evolute (ww/dm=0.51; uw/dm= 0.45). The whorl profile is rounded-trapezoidal with almost flat venter separated from the convex flanks by an angular ventrolateral shoulder. Next to this shoulder is a shallow, wide longitudinal groove (Fig. 10B). The whorls apparently do not touch each other, but this may be caused by dissolution of the shell wall.</p> <p>The suture line has a very broad external lobe, an angular ventrolateral saddle in the area of the ventrolateral shoulder and a flat, somewhat undulating lateral lobe (Fig. 10C). The siphuncle has a subcentral position.</p> <p>Remarks</p> <p>Stroboceras mane sp. nov. is an ancestral species of the genus and differs from almost all other species by the non-embracing whorls. Another distinguishing criterion is the very weak formation of longitudinal ridges and grooves.</p> </div>	http://treatment.plazi.org/id/9327592FF424195DFD431C8AFE5E550B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4251943FD7A1ACDFCB2558C.text	9327592FF4251943FD7A1ACDFCB2558C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stroboceras ancilis Korn & Bockwinkel 2022	<div><p>Stroboceras ancilis sp. nov.</p> <p>urn:lsid:zoobank.org:act: BA91AA8E-DD89-4E1E-8781-0BF2ADB763E1</p> <p>Figs 11–12, Table 6</p> <p>Diagnosis</p> <p>Species of Stroboceras with weakly depressed, rounded-trapezoidal whorl profile (ww/wh ~ 1.40), venter flat, ventrolateral shoulder angular with sharp longitudinal ridges. Whorls weakly embracing. Whorl profile with a wide longitudinal groove on the outer flank near the ventrolateral margin and a midflank longitudinal ridge.</p> <p>Etymology</p> <p>From the Latin noun ‘ ancilis ’, meaning ‘shield’ and referring to the whorl profile.</p> <p>Type material</p> <p>Holotype ALGERIA • Sebkha de Timimoun 14.5 km west-southwest of Timimoun (locality TIM-C8); Argiles de Timimoun supérieur (Upper Bollandoceras Assemblage; early to middle Viséan); Korn et al. 2002 Coll.; illustrated in Fig. 11C; MB.C.30459.1.</p> <p>Paratypes ALGERIA • 4 specimens; Sebkha de Timimoun 14.5 km west-southwest of Timimoun (locality TIM-C8); Argiles de Timimoun supérieur (Upper Bollandoceras Assemblage; early to middle Viséan); Korn et al. 2002 Coll.; MB.C.30459.2 – MB.C.30459.5.</p> <p>Description</p> <p>Holotype MB.C.30459.1 is a phragmocone fragment of a quarter whorl without shell preservation (Fig. 11C). It has a depressed pentagonal whorl profile and is widest at about the middle of the flank. The outer half of the flank is occupied by a shallow longitudinal groove, delimited on the ventral side by an angular ventrolateral shoulder and on the umbilical side by a rounded ridge. On the venter, near the ventrolateral shoulder, there is a finer ridge accompanied on both sides by a shallow longitudinal groove. The venter is slightly concave. The umbilical wall is oblique and almost flat; it ends at the umbilical seam. There is a small, very shallow dorsal whorl zone (Fig. 12A).</p> <p>The suture line shows four rounded lobes each on the venter, flank, umbilical wall and dorsal whorl zone (Fig. 12B). Of these, the rounded V-shaped external lobe is the deepest; the lateral lobe is somewhat asymmetrical and broadly rounded and the lobe on the umbilical wall is shallow. The internal lobe is small and broadly V-shaped.</p> <p>The paratypes show little variation in conch shape and suture line. The ww/wh ratio is between 1.30 and 1.40 in all specimens and the whorl profile has a very similar shape. Paratype MB.C.30459.2 (Fig. 11B), however, shows slightly more sharply defined longitudinal ridges; its suture line (Fig. 12D) has slightly shallower lobes than the holotype.</p> <p>Paratype MB.C.30459.3 is a heavily corroded specimen 37 mm in diameter (Fig. 11A). Although incomplete, it shows the general advolute conch form with whorls touching the preceding.</p> <p>Remarks</p> <p>Stroboceras ancilis sp. nov. differs from all other species of the genus by its almost rectangular whorl profile with a right-angled ventrolateral shoulder.</p> </div>	http://treatment.plazi.org/id/9327592FF4251943FD7A1ACDFCB2558C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4381941FD8A1A50FB2B50DC.text	9327592FF4381941FD8A1A50FB2B50DC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Vestinautilus Ryckholt 1852	<div><p>Genus Vestinautilus Ryckholt, 1852</p> <p>Type species</p> <p>Nautilus Koninckii d’Orbigny, 1850; subsequent designation by Hyatt (1883 –1884).</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with evolute conch; whorls slightly impressed; whorl profile rounded-triangular or trapezoidal with flattened or weakly concave venter and pronounced ventrolateral shoulder. Ornament with fine lines and very coarse spiral ridges around the ventrolateral shoulder, sometimes also on the venter. Suture line slightly sinuous. Siphuncle small with subcentral position (after Kummel 1964; emended by Korn et al. 2022).</p> <p>Included species</p> <p>Nautilus (Trematodiscus) altidorsalis Winchell, 1862, Michigan; Nautilus biangulatus Sowerby, 1825, Southwest England; Nautilus cariniferus Sowerby, 1825, Ireland; Vestinautilus concinnus Korn, Miao &amp; Bockwinkel, 2022, Algeria; Triboloceras formosum Foord, 1900, Ireland; Nautilus Koninckii d’Orbigny, 1850, Belgium; Nautilus multicarinatus Sowerby, 1825, Ireland; Vestinautilus padus Korn, Miao &amp; Bockwinkel, 2022, Algeria; Coelonautilus paucicarinatus Foord, 1891, Ireland; Nautilus pinguis de Koninck, 1844, Belgium; Vestinautilus semiglaber Foord, 1900, Ireland; Vestinautilus semiplicatus Foord, 1900, Ireland; Vestinautilus angulatus sp. nov., Algeria; Vestinautilus papilio sp. nov., Algeria; Vestinautilus inflexus sp. nov., Algeria; Vestinautilus bicristatus sp. nov., Algeria.</p> <p>Remarks</p> <p>In the description of the nautiloids from the Dalle à Merocanites, Korn et al. (2022) discussed the relationships between the genera Vestinautilus and Subvestinautilus; they considered the latter as a junior synonym.</p> <p>Vestinautilus differs from the other genera of the family Trigonoceratidae by the rather weakly ornamented shell in combination with a rounded-triangular or trapezoidal whorl profile. However, it should be noted that some of these genera, such as Rineceras, Vestinautilus and Stroboceras, show quite similar conch and ornamentat morphology at the beginning of their occurrence in the Tournaisian.</p> </div>	http://treatment.plazi.org/id/9327592FF4381941FD8A1A50FB2B50DC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4391946FD611F9BFB0A545A.text	9327592FF4391946FD611F9BFB0A545A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Vestinautilus angulatus Korn & Bockwinkel 2022	<div><p>Vestinautilus angulatus sp. nov.</p> <p>urn:lsid:zoobank.org:act: 6A498E25-5D60-4511-8BF2-5C868B8D12DF</p> <p>Figs 14–15, Table 8</p> <p>Diagnosis</p> <p>Species of Vestinautilus with depressed, rounded-trapezoidal whorl profile (ww/wh ~1.50), venter flattened, bordered by two sharp ridges, ventrolateral shoulder angular with sharp longitudinal ridges. Whorls not embracing. Ornament with two or three weak but sharp ridges on the flank.</p> <p>Etymology</p> <p>From the Latin ‘ angulatum ’, referring to the two angular ventrolateral ridges.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-E07); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 14B; MB.C.30461.1.</p> <p>Paratypes ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 14A; MB.C.30462.1 • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-E07); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 14C; MB.C.30461.2 • 19 specimens; Mouydir, south of Oued Temertasset (localities MOU-D1, MOU-A, MOU-B1, MOU-C4, MOU-D2, MOU-V, MOU-Z); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30462.2 – MB.C.30462.5, MB.C.30463.1 – MB.C.30463.5, MB.C.30464.1 – MB.C.30464.2, MB.C.30465.1 – MB.C.30465.3, MB.C.30466.1 – MB.C.30466.3, MB.C.30467, MB.C.30468 • 1 specimen; Sebkha de Timimoun 11 km south-west of Timimoun (locality TIM-B0); Grès de Kahla supérieur (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30469.</p> <p>Description</p> <p>Holotype MB.C.30461.1 is a phragmocone segment of about a quarter whorl with almost 9 mm whorl height (Fig. 14B). It shows a triangular whorl profile with a shallow, almost flat venter that is bordered on both sides by two elevated, sharp longitudinal ridges. Flanks, umbilical wall and dorsum form a broadly curved, semi-circular unit. On the flanks there are two longitudinal ridges, which are considerably weaker than the ridges on the ventrolateral shoulder (Fig. 15C). The suture line shows a deep, broadly rounded outer lobe and a ventrolateral saddle which has two crests because of the two longitudinal ridges. The lateral lobe is very broad and continues into a very low internal saddle (Fig. 15D).</p> <p>The two paratypes MB.C.30462.1 (9 mm wh; Fig. 14A) and MB.C.30461.2 (7 mm wh; Fig. 14C) are very similar to the holotype in conch form and suture line. The two-humped ventrolateral saddle is also pronounced in paratype MB.C.30462.1 (Fig. 15B).</p> <p>Remarks</p> <p>Vestinautilus angulatus sp. nov. belongs to the few species of the genus with a moderately depressed whorl profile (ww/wh ~1.50) and a very weak longitudinal sculpture; in these respects, the new species differs from all other species of the genus in which the whorls are not embracing.</p> </div>	http://treatment.plazi.org/id/9327592FF4391946FD611F9BFB0A545A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF43F1944FD721F45FDEA5418.text	9327592FF43F1944FD721F45FDEA5418.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Vestinautilus papilio Korn & Bockwinkel 2022	<div><p>Vestinautilus papilio sp. nov.</p> <p>urn:lsid:zoobank.org:act: F7146ECD-A229-4889-863C-4160E41BF1C4</p> <p>Figs 16–17, Table 9</p> <p>Diagnosis</p> <p>Species of Vestinautilus with moderately depressed, rounded-trapezoidal whorl profile (ww/wh ~1.60– 1.80), venter weakly flattened, with three longitudinal grooves on each side, ventrolateral shoulder subangular. Whorls weakly embracing. Ornament with two or three weak but sharp ridges on the flank.</p> <p>Etymology</p> <p>From the Latin ‘ papilio ’, meaning ‘butterfly’ and referring to the shape of the whorl profile.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 16A; MB.C.30470.1.</p> <p>Paratypes ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 16B; MB.C.30470.2 • 10 specimens; Mouydir, south of Oued Temertasset (localities MOU-D1, MOU-Z); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30470.3 – MB.C.30470.6, MB.C.30471.1 – MB.C.30470.6.</p> <p>Description</p> <p>Holotype MB.C.30470.1 is a phragocone segment of about a quarter whorl with almost 10 mm whorl height; it consists of four chambers (Fig. 16A). The whorl profile is depressed (ww/wh =1.62) and kidney-shaped with a rounded venter, subangular ventrolateral shoulder and a convex curved area encompassing the flanks and umbilical wall (Fig. 17A). The whorl weakly encloses the preceding whorl. On the venter there are three longitudinal marginal grooves on each side; the ventrolateral shoulder is defined by two slightly raised edges. The flanks bear two coarse spiral lines near the ventrolateral shoulder. The suture line has a low amplitude course; it shows a very low external saddle and very shallow lateral lobe. Only the internal lobe is deeper and has a blunt V-shaped form (Fig. 17B).</p> <p>Paratype MB.C.30470.2 shows, at a whorl height of 6 mm (Fig. 16B), a largely similar morphology to the holotype. However, there is the big difference that it does not have a concave whorl zone (Fig. 17C),</p> <p>.</p> <p>probably due to its small size. Furthermore, the whorl profile is broader (ww/wh = 1.82). The suture line is almost straight; there is no internal lobe (Fig. 17D).</p> <p>Remarks</p> <p>Vestinautilus papilio sp. nov. belongs to the species of the genus with a moderately depressed whorl profile (ww/wh ~ 1.70), a character that distinguishes the new species from most of the other species of the genus with weakly embracing whorls. Another criterion that distinguishes the new species is the rather weak longitudinal sculpture.</p> </div>	http://treatment.plazi.org/id/9327592FF43F1944FD721F45FDEA5418	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF43C194AFD6C1BD8FDDF55E6.text	9327592FF43C194AFD6C1BD8FDDF55E6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Vestinautilus inflexus Korn & Bockwinkel 2022	<div><p>Vestinautilus inflexus sp. nov.</p> <p>urn:lsid:zoobank.org:act: 7AEE52F5-6984-4497-8DC0-B23E712C1CF9</p> <p>Figs 18–19, Table 10</p> <p>Diagnosis</p> <p>Species of Vestinautilus with moderately depressed, rounded-triangular whorl profile (ww/wh ~ 1.95), venter weakly flattened, smooth, ventrolateral shoulder angular. Whorls not embracing. Ornament with three weak but sharp ridges on the flank. Septa inflexed to produce a deep external lobe.</p> <p>Etymology</p> <p>From the Latin ‘ inflexus ’, referring to the incurved septum.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 18B; MB.C.30472.1.</p> <p>Paratypes ALGERIA • 2 specimens; Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 18A, C; MB.C.30472.2 – MB.C.30472.3.</p> <p>Description</p> <p>Holotype MB.C.30472.1 is a phragmocone fragment from a quarter whorl with 15 mm whorl height (Fig. 18B). It has a moderately depressed whorl profile (ww/wh = 1.94) with a flattened venter and broadly rounded lateral and dorsal zones. The ventrolateral shoulder is subangular and reinforced by two sharp longitudinal ridges; there are two more, weaker ridges on the outer flank (Fig. 19B). The suture line shows a broad external lobe, flattened at the base. This particular shape is caused by an inflexion of the septum on the middle of the venter. There is a narrowly rounded saddle on the ventrolateral shoulder and a shallow, broadly rounded lobe on the flank (Fig. 19C).</p> <p>Paratype MB.C.30472.2 is a desert-polished specimen with half a whorl preserved; it has a diameter of 24.5 mm (Fig. 18A). It was sectioned and shows one and a half whorls, which possess a similar profile. The last preserved whorl does, at 24 mm conch diameter, not touch the preceding, but this may be caused by the lack of the original shell wall (Fig. 19A). The longitudinal ridges are only barely visible and rather weak when compared with the holotype. The suture line shows a deeper external lobe, which is less flattened at the base.</p> <p>The smaller paratype MB.C.30472.3 (Fig. 18C) with 6 mm whorl height has a less depressed whorl profile, but shows very clearly the ventral inflexion of the septum and the resulting very deep external lobe (Fig. 19E).</p> <p>Remarks</p> <p>Vestinautilus inflexus sp. nov. belongs to the species of the genus with a moderately depressed whorl profile (ww/wh ~1.95) and thus ranges between the more slender species V. angulatus sp. nov. (ww/wh ~1.50) as well as V. papilio sp. nov. (ww/wh ~ 1.70) and the stouter species V. bicristatus sp. nov. (ww/ wh ~2.15). The new species differs from those species of the genus with a similar whorl profile in the very weak longitudinal ridges.</p> </div>	http://treatment.plazi.org/id/9327592FF43C194AFD6C1BD8FDDF55E6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4321948FD9F1AAEFC0250DD.text	9327592FF4321948FD9F1AAEFC0250DD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Vestinautilus bicristatus Korn & Bockwinkel 2022	<div><p>Vestinautilus bicristatus sp. nov.</p> <p>urn:lsid:zoobank.org:act: 69CABBA5-6CDA-4264-B156-0FB2321AEDD5</p> <p>Figs 20–21, Table 11</p> <p>Diagnosis</p> <p>Species of Vestinautilus with strongly depressed, rounded-trapezoidal whorl profile (ww/wh ~ 2.10), venter up to 30 mm conch diameter broadly arched with two shallow submarginal grooves, which disappear in the adult stage. Ventrolateral shoulder defined by a subangular margin; one sharp ridge is located on the umbilical wall near the ventrolateral shoulder. Whorls weakly embracing, coiling very high (WER ~2.55). Ornament with delicate growth lines.</p> <p>Etymology</p> <p>From the Latin ‘ crista ’, meaning ‘crest’ and referring to the two lateral longitudinal ridges.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-C1); Argiles de Teguentour (Helicocyclus-Ouaoufilalites Assemblage; early late Tournaisian); Wendt et al. Coll.; illustrated in Fig. 20; MB.C.30473.</p> <p>Paratypes ALGERIA • 3 specimens; Mouydir, south of Oued Temertasset (locality MOU-C1); Argiles de Teguentour (Helicocyclus-Ouaoufilalites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 21; MB.C.30474.1 – MB.C.30474.3.</p> <p>Description</p> <p>Holotype MB.C.30473 is a desert-polished specimen with a diameter of 38 mm, showing the conch shape and small areas of ornament (Fig. 20). The conch is broadly cylindrical and subevolute (ww/dm = 0.84; uw/dm =0.37) with a very high coiling rate (WER =2.57). The whorl profile is strongly depressed (ww/wh =2.13) and shows a flattened venter, which possesses two submarginal external grooves at size stages between 17 and 35 mm diameter. These weaken considerably thereafter and are only visible as shallow longitudinal depressions at the maximum diameter of the specimen. The ventrolateral shoulder is distinguished by three edges, of which the two inner ones are strengthened by longitudinal ridges. Only small areas of shell ornament are visible; these show very fine growth lines on the venter with a deep external sinus.</p> <p>Three paratypes in fragmentary preservation are available. They are larger specimens with whorl widths between 49 and 80 mm, thus belonged to conchs with 60 to 90 mm diameter. Two of them (MB.C.30474.2 and MB.C.30474.3; Fig. 21B–C) show the imprint of the preceding whorl with sublateral longitudinal grooves in the dorsal region; in paratype MB.C.30474.3 the edges of the ventrolateral shoulder are also still visible. Both have a broadly rounded venter. The largest paratype MB.C.30474.1 shows a shallow, broad depression in the middle of the venter at its largest diameter (Fig. 21A).</p> <p>Paratype MB.C.30474.3 shows the suture line with a broad and shallow external lobe and a narrow and shallow lateral lobe, which has a position on the umbilical wall (Fig. 21C). The siphuncle has a slightly subcentral position towards the venter.</p> <p>Remarks</p> <p>Vestinautilus bicristatus sp. nov. belongs to the species of the genus that possess a very broad whorl profile (ww/wh&gt; 2.00) and an ornament with only a few spiral ridges. In this respect, V. cariniferus, V. paucicarinatus, V. pinguis and V. semiplicatus are similar, but these four species have a concave venter at least at times in ontogeny (Sowerby 1825; de Koninck 1844; Foord 1891, 1900). The most similar V. bicristatus sp. nov. is the species V. padus, which shows the same conch dimensions, but differs in the lack of the submarginal ventral grooves (Korn et al. 2022).</p> </div>	http://treatment.plazi.org/id/9327592FF4321948FD9F1AAEFC0250DD	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF436194EFD681F44FE3D523A.text	9327592FF436194EFD681F44FE3D523A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Trilobitoceras Korn & Bockwinkel 2022	<div><p>Genus Trilobitoceras gen. nov.</p> <p>urn:lsid:zoobank.org:act: A9F94ED5-FE49-4E8E-A349-8D675BB2160B</p> <p>Type species</p> <p>Trilobitoceras peculiaris gen. et sp. nov.</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with distinctly tripartite venter caused by two deep longitudinal grooves.</p> <p>Etymology</p> <p>After the superficial similarity in ventral view with the trilobites.</p> <p>Included species</p> <p>Nautilus (Trematodiscus) planidorsalis Winchell, 1862, Michigan; Trilobitoceras peculiaris gen. et sp. nov., Algeria.</p> </div>	http://treatment.plazi.org/id/9327592FF436194EFD681F44FE3D523A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF436194FFDB01DF9FD655444.text	9327592FF436194FFDB01DF9FD655444.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Trilobitoceras peculiaris Korn & Bockwinkel 2022	<div><p>Trilobitoceras peculiaris gen. et sp. nov.</p> <p>urn:lsid:zoobank.org:act: D75CCA9E-1207-4384-8848-3AF713D0D894</p> <p>Figs 23–24, Table 13</p> <p>Diagnosis</p> <p>Species of Trilobitoceras gen. nov. with moderately depressed whorl profile (ww/wh ~ 1.65). Suture line with a broadly rounded median saddle.</p> <p>Etymology</p> <p>From the Latin ‘ peculiaris ’, meaning ‘peculiar’ and referring to the unusual conch shape.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-Z); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 23A; MB.C.30477.</p> <p>Paratype ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 23B; MB.C.30478.</p> <p>Description</p> <p>Holotype MB.C.30477 is a phragmocone fragment with almost half a whorl length (Fig. 23A). It has a depressed whorl profile (ww/wh= 1.63) with a broadly rounded venter characterised by two deep and wide ventral grooves. The flanks are almost parallel in their middle and the umbilical wall is almost flat (Fig. 24A). The suture line, whose course is determined by the shape of the whorl profile, has a very wide external lobe in which a low, broadly rounded median saddle rises (Fig. 24B).</p> <p>Paratype MB.C.30478 is a fragment consisting of only two chambers of the phragmocone (Fig. 23B). The conch geometry is very similar to the holotype, although the ww/wh ratio is slightly higher with a value of 1.72. (Fig. 24C) The suture line is also similar to the holotype; however, the specimen also shows the rather narrow, rounded V-shaped internal lobe (Fig. 24D).</p> <p>Remarks</p> <p>Trilobitoceras peculiaris gen. et sp. nov. has a very similar conch morphology like T. planidorsale, but differs in the course of the suture line: T. peculiaris gen. et sp. nov. possesses a mid-ventral saddle but T. planidorsale possesses a mid-ventral lobe.</p> </div>	http://treatment.plazi.org/id/9327592FF436194FFDB01DF9FD655444	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF434194CFD9C1F44FACD52D4.text	9327592FF434194CFD9C1F44FACD52D4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Aphelaeceras Hyatt 1884	<div><p>Genus Aphelaeceras Hyatt, 1884</p> <p>Type species</p> <p>Nautilus (Discites) disciformis Meek &amp; Worthen, 1873; subsequent designation by Miller &amp; Garner (1953).</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with subevolute to evolute conch; whorls slightly impressed; whorl profile compressed, venter concave and bordered by an angular ventrolateral shoulder, flanks convex, convergent; umbilical margin rounded or subangular. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended).</p> <p>Included species</p> <p>Nautilus (Discites) disciformis Meek &amp; Worthen, 1873, Illinois; Nautilus (Discites) mutabilis M’Coy, 1844, Ireland; Nautilus (Discites) trochlea M’Coy, 1844, Ireland; Aphelaeceras arkansanum Gordon, 1965, Arkansas; Nautilus difficilis de Koninck, 1878, Belgium; Nautilus discoideus de Koninck, 1878, Belgium; Nautilus exaratus de Koninck, 1878, Belgium; Discitoceras discus Sowerby, 1813, Ireland; Discites Hibernicus Foord &amp; Crick, 1893, Ireland; Aphelaeceras azzelmattiense sp. nov., Algeria.</p> </div>	http://treatment.plazi.org/id/9327592FF434194CFD9C1F44FACD52D4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF434194DFD831D93FE045386.text	9327592FF434194DFD831D93FE045386.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Aphelaeceras azzelmattiense Korn & Bockwinkel 2022	<div><p>Aphelaeceras azzelmattiense sp. nov.</p> <p>urn:lsid:zoobank.org:act: 88F44087-A4B4-4FD7-9C36-CF189028289E</p> <p>Fig. 25, Table 14</p> <p>Diagnosis</p> <p>Species of Aphelaeceras reaching about 130 mm conch diameter. Conch with weakly compressed whorl profile (ww/wh ~ 0.65); venter double-keeled with narrow longitudinal groove; flanks convergent, umbilical margin subangular, umbilical wall oblique, weakly concave. Shell surface nearly smooth.</p> <p>Etymology</p> <p>Named after the type locality Gara Azzel Matti.</p> <p>Type material</p> <p>Holotype ALGERIA • Ahnet, west-southwest of Gara Azzel Matti; ‘ Dalle des Iridet’ (Ammonellipsites-Merocanites Assemblage; Tournaisian–Viséan boundary interval); Wendt and Kaufmann 1995 Coll.; illustrated in Fig. 25; MB.C.30479.1.</p> <p>Paratype ALGERIA • 1 specimen; Ahnet, west-southwest of Gara Azzel Matti; ‘ Dalle des Iridet’ (AmmonellipsitesMerocanites Assemblage; Tournaisian–Viséan boundary interval); Wendt and Kaufmann 1995 Coll.; MB.C.30479.2.</p> <p>Description</p> <p>Holotype MB.C.30479.1 is an incomplete, partially broken and desert-eroded specimen with a conch diameter of almost 120 mm (Fig. 25). The conch is very thinly discoidal (ww/dm=0.19) with a rather wide umbilicus (uw/dm=0.44) and moderate coiling rate (WER =1.95). The conspicuous, lyriform whorl profile is widest at the distinct, subangular umbilical edge. It shows an oblique, concave umbilical wall, convergent flanks and a double-keeled venter with a deep longitudinal median groove.</p> <p>Paratype MB.C.30479.2 is an incomplete specimen with 60 mm diameter, which largely complements the morphology of the holotype.</p> <p>Remarks</p> <p>Aphelaeceras azzelmattiense sp. nov. differs from all the other species of the genus in the concave umbilical wall.</p> </div>	http://treatment.plazi.org/id/9327592FF434194DFD831D93FE045386	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF40A1972FDE31F44FBDA52F8.text	9327592FF40A1972FDE31F44FBDA52F8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Maccoyoceras Miller, Dunbar & Condra 1933	<div><p>Genus Maccoyoceras Miller, Dunbar &amp; Condra, 1933</p> <p>Type species</p> <p>Nautilus (Discites) discors M’Coy, 1844; original designation.</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with evolute conch; whorls slightly impressed; whorl profile hexagonal or pentagonal with flattened or slightly concave venter and narrowly rounded umbilical margin. Ornament in the adult stage with coarse growth lines, in the preadult stage with fine spiral lines. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended by Korn et al. 2022).</p> <p>Included species</p> <p>Nautilus (Trematodiscus) discoidalis Winchell, 1862, Michigan; Nautilus (Discites) discors M’Coy, 1844, Ireland; Nautilus Leveilleanus de Koninck, 1844, Belgium; Maccoyoceras pentagonum Korn, Miao &amp; Bockwinkel, 2022, Algeria; Discitoceras Wrightii Foord, 1900, Ireland; Maccoyoceras saharensis sp. nov., Algeria; Maccoyoceras habadraense sp. nov., Algeria.</p> </div>	http://treatment.plazi.org/id/9327592FF40A1972FDE31F44FBDA52F8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF40A1970FD951DBEFEFC52E2.text	9327592FF40A1970FD951DBEFEFC52E2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Maccoyoceras saharensis Korn & Bockwinkel 2022	<div><p>Maccoyoceras saharensis sp. nov.</p> <p>urn:lsid:zoobank.org:act: 029ECCD2-153E-4624-8C6B-B1D24CF0E940</p> <p>Figs 26–27, Table 15</p> <p>Diagnosis</p> <p>Species of Maccoyoceras with subquadrate whorl profile (ww/wh ~1.05), venter slightly flattened, ventrolateral shoulder broadly rounded. Whorls not embracing.</p> <p>Etymology</p> <p>Named after the occurrence in the Sahara Desert.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, south of Oued Temertasset (locality MOU-A); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 26A; MB.C.30480.1.</p> <p>Paratypes ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 26B; MB.C.30481 • 7 specimens; Mouydir, south of Oued Temertasset (localities MOU-A, MOU-B5, MOU-E07, MOU-D2); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30480.2 – MB.C.30480.3, MB.C.30482.1 – MB.C.30482.2, MB.C.30483.1 – MB.C.30483.2, MB.C.30484.</p> <p>Description</p> <p>Holotype MB.C.30480.1 is the fragment of a phragmocone of a quarter whorl length (Fig. 26A); it has a whorl height of 16 mm. The whorl profile is subquadratic with flattened, very weakly convergent flanks, a broadly rounded venter and a broadly rounded dorsum (Fig. 27A). The internal mould shows no ornament, but very faint remnants of spiral striation are visible. The suture line extends with a slight</p> <p>depression on the venter, a slightly deeper, very broadly rounded lobe on the flank and a very shallow internal lobe (Fig. 27B).</p> <p>Paratype MB.C.30481 shows the chambered remains of two whorls that touch but do not overlap (Fig. 26B). On the outer whorl with 12 mm whorl height, the profile is subquadrate (ww/wh =1.04) with a wider, flattened venter, weakly divergent, also flattened flanks and a more tightly rounded dorsum (Fig. 27C). The penultimate whorl, 3.8 mm high, is rounded-triangular in profile and somewhat depressed (ww/wh =1.28). The suture line is similar to that of the holotype, but shows a higher ventral area with a slightly deeper external lobe (Fig. 27D).</p> <p>Remarks</p> <p>Maccoyoceras saharensis sp. nov. differs from the other species of the genus by the whorl profile form with a strongly rounded ventrolateral shoulder. Another difference could be the strength of the ornament; in M. saharensis sp. nov. no spiral lines were impressed into the internal mould. However, since no shell specimens of the new species are known, it is impossible to say whether spiral lines were actually present. It is therefore also possible that the new species belongs to another genus, for example Lispoceras.</p> </div>	http://treatment.plazi.org/id/9327592FF40A1970FD951DBEFEFC52E2	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4081971FD861DA0FD1054B3.text	9327592FF4081971FD861DA0FD1054B3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Maccoyoceras habadraense Korn & Bockwinkel 2022	<div><p>Maccoyoceras habadraense sp. nov.</p> <p>urn:lsid:zoobank.org:act: CDDB23E7-2380-4600-BCF0-71E3F2159BF2</p> <p>Fig. 28, Table 16</p> <p>Diagnosis</p> <p>Species of Maccoyoceras reaching about 100 mm conch diameter. Conch with weakly depressed whorl profile (ww/wh ~1.10); venter flattened, ventrolateral shoulder narrowly subangular. Whorls just touching the preceding. Ornament in the juvenile stage with few coarse, granulated spiral lines on the flank, in the adult stage without spiral lines. Fine, sharp growth lines on the flank, with weakly biconvex course with a shallow lateral sinus and a moderately high ventrolateral projection. Venter with delicate growth lines with deep sinus.</p> <p>Etymology</p> <p>Named after the type locality Hassi Habadra.</p> <p>Type material</p> <p>Holotype ALGERIA • Mouydir, west of Hassi Habadra (locality MOU-W); Argiles de Teguentour (HelicocyclusOuaoufilalites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 28N; MB.C.30485.</p> <p>Description</p> <p>Holotype MB.C.30485 is an incomplete specimen with 66 mm conch diameter (Fig. 28). It allows the study from both sides. The conch is extremely discoidal (ww/dm= 0.34) and evolute (uw/dm =0.46) with a high coiling rate (WER =2.17). The whorl profile is weakly depressed hexagonal (ww/wh =0.93) and widest at the rounded umbilical margin. The flanks converge barely towards the subangular ventrolateral shoulder that separates the flanks from the flattened venter. The umbilical wall is convexly rounded.</p> <p>There are two ontogenetic stages in the ornament development; the first ranges up to about 35 mm conch diameter and possesses about ten spiral lines on the flank. The second stage does not show spirals but</p> <p>only fine, narrow-standing growth lines with weakly biconvex course. These are restricted to the flanks, while the venter shows very delicate growth lines forming a very deep sinus.</p> <p>Remarks</p> <p>Maccoyoceras habadraense sp. nov. has similarities with M. pentagonum, but has a wider umbilicus (uw/dm = 0.45 in M. habadraense sp. nov. but only 0.40 in M. pentagonum). Furthermore, the spiral lines are markedly coarser in M. habadraense sp. nov.; this feature also distinguishes the new species from the other species of the genus.</p> </div>	http://treatment.plazi.org/id/9327592FF4081971FD861DA0FD1054B3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF4091976FD961870FC285403.text	9327592FF4091976FD961870FC285403.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Maccoyoceras concavum Korn & Bockwinkel 2022	<div><p>Maccoyoceras concavum sp. nov.</p> <p>urn:lsid:zoobank.org:act: CC00C3E7-5DF4-4FA9-844C-AAA60F1F5016</p> <p>Fig. 29, Table 17</p> <p>Diagnosis</p> <p>Species of Maccoyoceras reaching about 100 mm conch diameter. Conch with weakly compressed whorl profile (ww/wh ~ 0.90); venter weakly concave, ventrolateral shoulder narrowly subangular. Whorls weakly embracing the preceding. Ornament in the juvenile stage with few coarse, granulated spiral lines on the flank, in the adult stage without spiral lines. Fine, sharp growth lines on the flank, with weakly biconvex course with a shallow lateral sinus and a moderately high ventrolateral projection. Venter with delicate growth lines with deep sinus.</p> <p>Etymology</p> <p>After Latin ‘ concavum ’, referring to the shape of the venter.</p> <p>Type material</p> <p>Holotype ALGERIA • Ahnet, west-southwest of Gara Azzel Matti; ‘ Dalle des Iridet’ (Ammonellipsites-Merocanites Assemblage; Tournaisian–Viséan boundary interval); Wendt and Kaufmann 1995 Coll.; illustrated in Fig. 29; MB.C.30486.</p> <p>Description</p> <p>Holotype MB.C.30486 is a rather well-preserved, almost completely chambered specimen with 76 mm conch diameter, from which the last, poorly preserved segment was removed before photography (Fig. 29). The specimen allows the study from both sides. The conch is extremely discoidal (ww/ dm =0.32) and subevolute (uw/dm =0.41) with a very high coiling rate (WER =2.35). The whorl profile is compressed hexagonal (ww/wh =0.93) and widest at the rounded umbilical margin. The flanks stand almost parallel and converge barely towards the angular ventrolateral shoulder that separates the flanks from the weakly concave venter. The umbilical wall is convexly rounded.</p> <p>Two ontogenetic stages of the ornament development can be separated: up to 17 mm conch diameter, six coarse, crenulated spiral lines on the flank are the dominant elements in the juvenile stage. Thereafter, fine but sharp narrow-standing growth lines with weakly biconvex course form the ornament on the flanks, but the venter bears very delicate growth lines with a deep ventral sinus. The suture line shows a shallow ventral lobe and a shallow lateral lobe. The siphuncle is almost central.</p> <p>Remarks</p> <p>Maccoyoceras concavum sp. nov. has conch proportions very similar to those of M. pentagonum from the contemporaneous ‘Dalle à Merocanites ’ of Timimoun. However, the new species differs from this and from the other species of the genus by the concave venter.</p> </div>	http://treatment.plazi.org/id/9327592FF4091976FD961870FC285403	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF40F1977FD6D1F44FCD15227.text	9327592FF40F1977FD6D1F44FCD15227.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Lispoceras Hyatt 1893	<div><p>Genus Lispoceras Hyatt, 1893</p> <p>Type species</p> <p>Lispoceras trivolve Hyatt, 1893; original designation.</p> <p>Diagnosis</p> <p>Genus of the family Trigonoceratidae with evolute conch; whorls just touching each other; whorl profile weakly depressed elliptical or circular. Ornament in the adult stage with fine growth lines, in the preadult stage with fine spiral lines. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended by Korn et al. 2022).</p> <p>Included species</p> <p>Lispoceras orbis Korn, Miao &amp; Bockwinkel, 2022, Algeria; Lispoceras proconsul Shimansky, 1967, Kazakhstan; Lispoceras rotundum Hyatt, 1893, Ireland; Lispoceras trivolve var. simplum Hyatt, 1893, Belgium; Lispoceras trivolve Hyatt, 1893, Belgium.</p> </div>	http://treatment.plazi.org/id/9327592FF40F1977FD6D1F44FCD15227	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF40F1977FD3E1DECFDE554F4.text	9327592FF40F1977FD3E1DECFDE554F4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Lispoceras undefined-1	<div><p>Lispoceras sp. 1</p> <p>Fig. 30, Table 18</p> <p>Material examined</p> <p>ALGERIA • 1 specimen; Mouydir, south of Oued Temertasset (locality MOU-C1); Argiles de Teguentour (Helicocyclus-Ouaoufilalites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 30; MB.C.30487.</p> <p>Description</p> <p>Specimen MB.C.30487 is a body chamber fragment that belonged to a conch approximately 10 mm diameter (Fig. 30). It has an almost circular whorl profile with a slightly clearer umbilical margin. The last whorl only slightly encompassed the previous one, recognisable by the very small dorsal whorl zone. The shell surface, although marred by desert grinding, is clearly recognisable. The ornament consists of fine growth lines running in a slightly posterior direction across the umbilical wall and flanks, then forming a deep ventral sinus.</p></div> 	http://treatment.plazi.org/id/9327592FF40F1977FD3E1DECFDE554F4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
9327592FF40C1974FD3E1C61FB6B5559.text	9327592FF40C1974FD3E1C61FB6B5559.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Lispoceras undefined-2	<div><p>Lispoceras sp. 2</p> <p>Fig. 31, Table 19</p> <p>Material examined</p> <p>ALGERIA •Ahnet, west-southwest of Gara Azzel Matti; ‘Dalle des Iridet’ (Ammonellipsites-Merocanites Assemblage; Tournaisian–Viséan boundary interval); Wendt and Kaufmann 1995 Coll.; illustrated in Fig. 31; MB.C.30488.</p> <p>Description</p> <p>Specimen MB.C.30488 is a fragmented conch with a diameter of almost 70 mm, it consists of a part of the body chamber, the phragmocone of the last whorl and a small piece of the second last whorl (the best-preserved piece is illustrated in Fig. 31). The conch is discoidal and subevolute (ww/dm=0.46; uw/ dm =0.41) with a depressed rectangular whorl profile. The flanks are almost parallel and separated from the flattened venter by a rounded but distinct ventrolateral shoulder. Any overlap of the whorls is not visible. The suture line shows a broadly rounded external lobe and a rounded lateral lobe.</p></div> 	http://treatment.plazi.org/id/9327592FF40C1974FD3E1C61FB6B5559	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Dieter;Bockwinkel, Jürgen	Korn, Dieter, Bockwinkel, Jürgen (2022): Early Carboniferous nautiloids from the Central Sahara, southern Algeria. European Journal of Taxonomy 831: 67-108, DOI: https://doi.org/10.5852/ejt.2022.831.1871, URL: http://dx.doi.org/10.5852/ejt.2022.831.1871
