taxonID	type	description	language	source
AC616F221577671BFF410E2AFAFFE473.taxon	discussion	Adapted from Zaragoza-Caballero & Pérez-Hernández (2014), with modifications on couplet 16 and the addition of a new couplet. The key is presented here starting at couplet 12, which includes the Mastinocerinae with 12 - segmented antennae and first pro- and mesotarsomere with ventral combs.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	description	urn: lsid: zoobank. org: act: 8 E 421 AB 8 - 7 EE 1 - 4492 - 92 A 8 - 2 D 74 E 89 A 462 A Figs 1 – 5	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	type_taxon	Type species Iviephengus ferreirai gen. et sp. nov., here designated.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	diagnosis	Diagnosis Interantennal distance close to 3 × the antennal socket length (Figs 1 D, 2 A); antenna 12 - segmented, IV to XI each with two long symmetrical compressed and apically slightly enlarged branches, longer than respective antennomere (Fig. 2 G); labrum fused to frontoclypeus (Fig. 2 A); mandible short, not projecting and obliquely crossed, each with a notch on the external margin to fit the other mandible and without extra teeth (Fig. 2 H – I); maxillary palpi 4 - segmented, last segment digitiform (Fig. 2 J); labial palpi 2 - segmented (Fig. 2 K); posterior tentorial pit consisting of a single small fossa (Fig. 2 B); elytron around 2.5 × longer than wide, slightly convergent posteriorly and slightly thickened apically (Fig. 1 A); wing with radial cell closed and transverse, vein r 4 interrupted, r 3 absent (Fig. 1 E); first tarsomere of pro- and mesotarsus with a ventral comb covering the posterior half of the tarsomere (Fig. 3 A – B); claws simple, without any teeth (Fig. 3 C); aedeagus with paramere symmetrical, apex unevenly round, toothed inward, with short and sparse bristles (Fig. 4 D, G – H).	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	etymology	Etymology The name is in honour of the entomologist Michael Ivie, a great Coleoptera researcher who has contributed largely to the knowledge of world beetles, including phengodids, with a major focus on morphology and taxonomy. Michael kindly received me during my visit to the Montana State University and allowed the loan of several Phengodidae specimens. The suffix phengus is found in several Phengodidae genera. Singular genitive, masculine.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	description	Description Male HEAD (Figs 1 D, 2). Head wider than long, with posterior margin subparallel, slightly convergent posteriorly, usually covered by pronotum, as wide as the pronotum; antenna slightly longer than elytron; 12 - segmented, antennomeres IV – XI with two symmetrical compressed and apically slightly enlarged branches, longer than respective antennomere (Fig. 2 G); eyes moderately protruding, finely faceted (Fig. 2 A – F), frontoclypeus with a declivity between the antennae before labrum, interantennal space close to 3 × antennal socket width; labrum small, fused with frontoclypeus but with vestigial lateral sutures, bilobate (Fig. 2 A); mandibles moderately long, continuously tapered towards the apex, around 4 × longer than basal width, slightly projected and obliquely crossed, with an external notch to fit the other mandible (Fig. 2 H – I); maxilla with palpi 4 - segmented, last palpomere digitiform, palpifer distinct, galea distinct, extremely short and free, highly setose, lacinia almost fused with the stipe, highly setose, cardo semitriangular, 2 × as wide as long (Fig. 2 J); labium with palpi 2 - segmented, short, not covered by mandibles, last palpomere digitiform, ligula absent, prementum oval, palpiger absent, mentum and submentum fused in a single piece, which is fused with the head (Fig. 2 K); one gular suture, tentorial pit with single fossa (Fig. 2 B). THORAX (Figs 1 A – D, 3). Pronotum trapezoidal, slightly wider than long, anterior angles dorsally concave, rounded, lateral margins subparallel, laterally curved down in the anterior angles (Fig. 1 D); elytron surpassing the fourth abdominal segment, around 2.5 × as long as wide, wider in anterior half, slightly convergent posteriorly, subparallel, apex slightly swollen (Fig. 1 A); posterior wings with radial cell closed, moderately elongated and transverse, around 2.5 × as wide as long, r 4 interrupted both in the radial cell and RP, r 3 absent, RP reaching one third of MP 1 + 2 length, medial field containing five main veins: MP 3, MP 4, CAS and AA 4; CuA 1 and CuA 2 absent, anal lobe well developed, AP 3 + 4 long, J absent (Fig. 1 E); legs increasing in length from proleg to metaleg, pro- and mesotarsomere I with a ventral comb covering the posterior half of the tarsomere (Fig. 3 A – B), protarsomere I 2 × as long as II, II – IV decreasing in length, tarsomere IV of all legs with ½ V length, claws simple, without any teeth (Fig. 3 C). ABDOMEN (Fig. 4). Subparallel, tergites and ventrites extremely transverse, around 3 – 4 × as wide as long, slightly increasing in length from the first to the last, tergite VIII as wide as long; tergites with anterior margin slightly emarginate, lateral margins subparallel, posterior margin straight to slightly rounded (Fig. 4 A); tergite IX transverse, with a membranous division in the middle, anterior margin oblique inward, posterior margin curved inwards; tergite X short, conical, lateral margins subparallel (Fig. 4 E); sternites each with anterior margin straight, lateral margins subparallel, posterior margin straight to slightly rounded (Fig. 4 B), sternite VIII with a membranous, densely setose projection on anterior margin (Fig. 4 C), sternite IX elongate, posterior margin slightly emarginate (Fig. 4 F); aedeagus trilobed, basal piece attached to the median lobe, feebly sclerotized, and shaped as a ribbon-like stripe, median lobe cylindrical, strongly curved at base, rounded apically; flagellum encircled around median lobe at rest; about 2 × as long as median lobe length; parameres symmetrical, narrowing slightly past the middle towards the apex, which is truncate, toothed inward, with short and sparse bristles (Fig. 4 D, G – H). Female and immature stages Unknown.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	biology_ecology	Biology and distribution No specimens of Iviephengus gen. nov. were seen alive, so there is no data regarding their habits. The genus is only known to occur in the Peruvian Amazon. All specimens were collected in March, the end of the summer in the southern hemisphere.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221574671CFD920CCCFAD4E18B.taxon	discussion	Remarks Iviephengus gen. nov. can easily be separated from most of the genera of Mastinocerinae by the presence of a ventral comb in the pro- and mesotarsomere I. When compared with other genera with combs on pro- and mesotarsomere I, it can be separated from all of them, with the exception of Cephalophrixothrix Wittmer, 1976, by the comb covering half of the ventral pro- and mesotarsomere I (vs covering the entire ventral pro- and mesotarsomere I in the other genera). It can be differentiated from Cephalophrixothrix by the mandible with a notch on the external margin to fit the other mandible (vs without a notch in Cephalophrixothrix), the labial palpi with two palpomeres (vs three in Cephalophrixothrix), and the tarsomere II half the length of tarsomere I (vs subequal to tarsomere I length in Cephalophrixothrix).	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	description	urn: lsid: zoobank. org: act: B 494 D 7 AF- 5567 - 4 E 31 - B 733 - 450 E 353 A 4 F 1 A Figs 1 – 5	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	diagnosis	Diagnosis Body overall yellowish brown, with meso- and metanotum, anterior half of metasternum, and abdominal tergites and ventrites dark brown (with the exception of the last two) (Fig. 1 A – C). Eyes occupying about 1 / 5 of head width in dorsal view; in lateral view, posterior margin vertical, slightly reniform (Fig. 2 D). Antennomere IV length subequal to III, crescent until X, X – XII decrescent (Fig. 2 G). Pronotum slightly wider than long, anterior margin straight, posterior margin slightly curved (Fig. 1 D). Elytron 2.5 × as long as wide (Fig. 1 A).	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	etymology	Etymology The species name is given in honour of Vinicius S. Ferreira, a good friend and fellow Coleoptera researcher (Lycidae specialist). Vinicius received me during my visit to MAIC and guided my search through the available material. Vinicius also has contributed to my research through collaborations, discussions, and other contributions. Singular genitive, masculine.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	materials_examined	Type material Holotype PERU • ♂; San Martín, 30 km S of Picota; 6 – 16 Mar. 2005; M. E. Irwin leg.; Malaise trap; PE 11 - 02; MUSM. Paratypes PERU • 2 ♂♂; same collection data as for holotype; DZRJ • 13 ♂♂; same collection data as for holotype; MAIC. Type locality Picota, San Martín, Peru.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	description	Description Male MEASUREMENTS (n = 13). Total length: 3.3 – 3.8 mm (aver. 3.6 mm). Head length: 0.63 – 0.68 mm (aver. 0.66 mm). Head width: 0.80 – 0.90 mm (aver. 0.87 mm). Pronotum length: 0.77 – 0.84 mm (aver. 0.80 mm). Pronotum maximum width: 0.93 – 0.96 (aver. 0.95 mm). Elytron length: 1.61 – 1.64 mm (aver. 1.63 mm). Elytron maximum width: 0.62 – 0.65 mm (aver. 0.64 mm). MORPHOLOGY. Head slightly wider than long, integument glossy, smooth, coarsely punctate, eyes small, feebly protruding, occupying 1 / 5 of the width in dorsal view (Figs 1 D, 2 A) post-ocular area subequal to eye length in lateral view, posterior margin straight, slightly reniform (Fig. 2 D); antennomere IV length subequal to III, progressively longer from IV to X, X – XII decrescent, XII slightly lanceolate, antennomere IV flabellae 4 × as long as antennomere body (Fig. 2 G); maxilla with last palpomere as long as the three preceding ones (Fig. 2 J); labium with last palpomere five times longer than the first one (Fig. 2 K). Pronotum slightly wider than long, integument glossy, smooth, coarsely punctate, anterior margin straight, lateral margins dorsally subparallel, posterior margin slightly curved (Fig. 1 D). Elytron heavily setigerous punctate, around 2.5 × as long as wide (Fig. 1 A). Posterior wings with venation as in the genus description (Fig. 1 E). Tergite IX transverse, 3 × as wide as long in the middle line; tergite X 1.5 × as long as wide (Fig. 4 E). Sternite VIII with posterior margin slightly curved (Fig. 4 C); sternite IX 2 × times as long as wide when including membranous area, posterior margin slightly emarginate (Fig. 4 F). Aedeagus as in the genus description (Fig. 4 D, G – H). COLORATION. Body overall yellowish brown, with meso- and metanotum, anterior half of metasternum, and tergites and ventrites dark brown (with the exception of the last two). Immatures and females Unknown.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
AC616F221573671EFDC209B5FCEDE2EF.taxon	biology_ecology	Biology and distribution Iviephengus ferreirai gen. et sp. nov. is only known to occur in the Peruvian Amazon (Fig. 5). All specimens were collected in March, the end of the Summer in the southern hemisphere. Specimens were never seen alive, so there is no data regarding their habits.	en	Roza, André Silva (2023): A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae). European Journal of Taxonomy 864 (1): 64-76, DOI: https://doi.org/10.5852/ejt.2023.864.2087, URL: http://zoobank.org/05ed98f7-dec6-4285-a7ce-2f1ce3d4dede
