taxonID	type	description	language	source
FCFBA1C04E115B478C86BE5FCFDACFFA.taxon	description	Figs 2, 3, 4	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
FCFBA1C04E115B478C86BE5FCFDACFFA.taxon	diagnosis	Diagnosis. Body orange-yellow, with thin dark dorsal centreline, dark transverse stripes anteriorly on Th II-Abd IV and Abd VI, and dorsomedial rectangular patch posteriorly on Abd IV. Ventral body entirely dark in adults. Ant IV with trilobed apical bulb. Labral papillae with spine-like projection. Lateral process on labial papilla E not reaching apex of papilla. Claw with four inner teeth. Paired lateral teeth and dorsal tooth intermediate. The exact identification of the species can be made by using the abbreviated macrochaetotaxy formula (sensu Jordana and Baquero 2005) of the head (H 1 - 5 areas), Th II (T 1 - 2 areas), Abd II (A 1 - 2 areas), Abd III (A 3 - 5 areas), and Abd IV (A 6 - 10 areas) as: 5 (6) - 1 (2) - 0 - 3 - 2 / 4 - 5 (6) / 2 - 5 (6) / 0 - 2 - 2 / 0 - 4 (6) - 10 (0) 4 - 10 (0) 3 (5) - 2.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
FCFBA1C04E115B478C86BE5FCFDACFFA.taxon	description	Description. Habitus. Adult body length (excluding antennae) 2.79 - 3.41 mm (n = 8), holotype 3.41 mm. Adult body ground colour orange-yellow (Fig. 2 A, B), juveniles and subadults pale yellow (Fig. 2 C, D). Pattern with a thin dark longitudinal line along dorsal centreline of Th II-Abd IV, widened towards end of Abd IV segment (in juvenile specimens, thin middle dorsal line purple and from Th II to Abd III only). Dark narrow, continuous, or occasionally interrupted transverse stripes on anterior margins of Th II-Abd IV and Abd VI. In juveniles, transverse stripes either very thin or missing. Posteriorly on Abd IV, a dorsomedial dark rectangular patch always present, both in adult and juvenile specimens. Antenna base black, black spot between bases of antennae. Dark violet pigment on antennae with increasing intensity from base to apex of segments. Lateral parts of abdominal segments and ventral body entirely dark in adult specimens. Ventral side in juveniles with no dark pigmentation, appearing first between legs in later developmental stages (Fig. 2 D). In adults, dark pigmentation also on coxae and manubrial base. Head. 8 + 8 eyes, GH smaller than EF (Fig. 3 A). Interocular chaetotaxy with five chaetae (s, t, p, q, r). Antennae length 1.41 - 1.73 mm (n = 8), holotype 1.73 mm. Antennal length to head diagonal length ratio 2.50 - 2.77 (n = 8), holotype 2.50. Relation of antennal joints I-IV as 1: 1.8 - 2.3: 1.4 - 2.0: 1.8 - 2.3 (n = 7). Ant IV with trilobed apical bulb (Fig. 3 B). Ant III sensillary organ composed of two sensory rods partially behind a cuticular fold, guarded by three short sensilla (Fig. 3 C). Arrangement of chaetae on labrum 4 / 554, prelabral chaetae ciliated, posterior, median and anterior labral chaetae smooth (Fig. 3 D). Labrum with four rounded labral papillae with strong, armed spine-like projection (Fig. 3 D). Outer maxillary palp with two smooth chaetae and three smooth sublobal chaetae. Lateral process (sensu Fjellberg 1999) on labial papilla E not reaching apex of papilla (Fig. 3 E). Labium chaetotaxy formed by five smooth " a " chaetae and, in the basal row, by ciliated chaetae M 1, M 2, R, E, L 1 and L 2 (Fig. 3 F); M 2 thinner and shorter than M 1, R reduced. Chaeta M 2 present in four of eight type specimens, bilaterally present in two specimens, and absent in two specimens. Body. Ratios of Abd IV / III length 3.57 - 4.47 (n = 8), holotype 4.23. No differentiated chaetae on tibiotarsus III, with exception of smooth terminal chaeta opposite to tenent hair. Trochanteral organ with up to 29 spine-like chaetae (Fig. 4 A). Unguis and unguiculus of claw III as in Fig. 4 B. Unguis inner side with sub-equal paired basal teeth at 54 % from inner edge, and with two more unpaired teeth at 71 % and 86 % from inner edge, respectively. Paired lateral teeth intermediate, at level slightly below the paired internal teeth. Unpaired dorsal tooth located approximately at 35 - 45 % of distance from base. A small pretarsal chaeta present on both anterior and posterior surfaces. Unguiculus lanceolate, outer lamella serrated. Tibiotarsal tenent hair clavate, as long as claw. Ratio of smooth terminal chaeta / unguiculus around 1. Ventral tube with 19 + 19 ciliated chaetae on anterior side and 9 + 9 ciliated chaetae on posterior side (Fig. 4 C); lateral flap with nine ciliated and seven smooth chaetae (Fig. 4 D). Manubrial plate with eight or nine chaetae, including two larger inner chaetae and six or seven chaetae outer two psp (Fig. 4 E). Length of not ringed terminal dens ~ 2 x the length of mucro. Mucro with distal tooth larger than anteapical one; basal spine just reaching tip of anteapical tooth (Fig. 4 F). Macrochaetotaxy (Figs 3 A, 5 A-D). Simplified Mac formula: 5 (6) - 1 (2) - 0 - 3 - 2 / 4 - 5 (6) / 2 - 5 (6) / 0 - 2 - 2 / 0 - 4 (6) - 10 (0) 4 - 10 (0) 3 (5) - 2. Head (Fig. 3 A): H 1 area with five Mac (An 2, An 3 a 1, An 3 a 2, An 3 and one additional Mac from the An series); H 2 area regularly with one Mac (A 5) and occasionally (and always bilaterally) also with A 6 as Mac; H 3 area without Mac; H 4 area with three Mac (S 1, S 3 and S 4 i); H 5 area with two Mac (Ps 2 and Ps 5). Mesothorax (Fig. 5 A): area T 1 with four Mac (m 1, m 2, m 2 i and m 2 i 2); T 2 with 5 - 6 Mac (a 5, m 4, m 4 i, m 4 p always present, m 4 pi present or absent). Abdomen: Abd II (Fig. 5 B) area A 1 with two Mac (a 2 and a 3); area A 2 with 5 - 6 Mac (m 3, m 3 e, m 3 ep, m 3 ei and m 3 ea always present, m 3 eai present or absent); Abd III (Fig. 5 C) area A 3 without Mac; area A 4 with two Mac (a 2 and a 3), and area A 5 with two Mac (m 3 and m 3 e); Abd IV (Fig. 5 D) area A 6 without Mac; area A 7 with 4 - 6 Mac (A 3, B 2, C 1 and E 1 always present; Ae 3 present in half of the studied specimens while B 3 in a quarter); area A 8 with unpaired central Mac A 04 present or absent, and four Mac (A 4 a, Ae 4, B 4 and C 2 a); area A 9 with unpaired central Mac A 05 present or absent, and 3 - 5 Mac (A 5, B 5 and one Mac of uncertain homology always present, Ae 5 and Ae 5 pp present or absent); and area A 10 with two Mac (A 6 and B 6); sensillar formula from Th II to Abd V: 2,2 / 1,2,2,12,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
FCFBA1C04E115B478C86BE5FCFDACFFA.taxon	etymology	Etymology. The name of the new species refers to the habitat, Pannonic open sand steppes, where E. arenaria is one of the most dominant epigeic Collembola species.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
AC6C3F5BEA525990ABDE8E0C53141D66.taxon	description	Figs 10, 11	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
AC6C3F5BEA525990ABDE8E0C53141D66.taxon	materials_examined	Material. Five ♂♂ and five ♀♀ on three slides (Nr. HNHM-collpr- 919 to HNHM-collpr- 920; and WD-coll- 149), 17 specimens in 96 % ethyl alcohol (Vial WD 179). Hungary, Osli, com. Gyor-Moson-Sopron, 112 m asl, 47 ° 39 ' 05 " N, 17 ° 06 ' 15 " E, D-vac sample, 12 Jul. 2020, leg. D. Winkler. Two slides are stored at HNHM, one slide and the specimens in alcohol are preserved at SOE.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
AC6C3F5BEA525990ABDE8E0C53141D66.taxon	description	Description. Habitus. Adult body length up to 3.62 mm excluding antennae. Base colour pale yellow to orange-brown. Colour pattern typically with five longitudinal stripes running from the anterior part of Th II: the central stripe thin and often reaching the posterior part of Abd IV, the dorsolateral stripes reach the mid Abd II. Irregular oblique patches typical for the species on both Abd II and III. Abd IV with four or five irregular patches separated or connected (Fig. 10 A). Ventral body entirely dark in most of the adult specimens (Fig. 10 B) Head. 8 + 8 eyes, GH smaller than EF (Fig. 11 A). Interocular chaetotaxy with five chaetae (s, t, p, q, r). Antennae length 1.30 - 1.99 mm (n = 7). Antennal length to head diagonal length ratio 2.49 - 3.26 (n = 7). Relation of antennal joints I-IV as 1: 2.2: 1.9: 2.2. Ant IV with bilobed apical bulb. Ant III sensillary organ composed of two sensory rods partially behind a cuticular fold, guarded by three short sensilla. Arrangement of chaetae on labrum 4 / 554, prelabral chaetae ciliated, posterior, median and anterior labral chaetae smooth. Labrum with four labral papillae with spine-like expansion (as in Fig. 8 B). Outer maxillary palp with two smooth chaetae and three smooth sublobal chaetae. Lateral process on labial papilla E not reaching apex of papilla (as in Fig. 3 E). Labium chaetotaxy formed by 5 smooth " a " chaetae and, in basal row, by ciliated chaetae M, R, E, L 1, and L 2 with R smaller than other chaetae (ratio of R / M ~ 0.7). Body. Ratio of Abd IV / III length 3.14 - 3.89 (n = 9). No differentiated chaetae on tibiotarsus III, except for smooth terminal chaeta opposite to tenent hair. Trochanteral organ with up to 24 spine-like chaetae (Fig. 11 B). Unguis with sub-equal paired basal teeth at 52 % from the inner edge and with two more unpaired teeth at 76 % and 89 % from inner edge, respectively. Unpaired dorsal and paired lateral teeth intermediate, at level slightly below the paired internal teeth. A small pretarsal chaeta present on both anterior and posterior surfaces. Unguiculus lanceolate, outer lamella smooth (Fig. 11 C). Tibiotarsal tenent hair clavate, as long as claw. Ratio of smooth terminal chaeta / unguiculus 0.9. Ventral tube with 17 + 17 ciliated chaetae on anterior side and 9 + 9 ciliated chaetae on posterior side; lateral flap with 6 ciliated and 11 smooth chaetae. Manubrial plate with 5 - 6 chaetae and two psp (Fig. 11 D). Length of not ringed terminal dens ~ 2.5 x the length of mucro. Mucro with apical tooth markedly larger than anteapical; basal spine just reaching tip of anteapical tooth. Macrochaetotaxy (Fig. 11 A, E-H). The studied population can be described by the following abbreviated formula: 4 - 1 - 0 - 3 - 2 / 4 - 5 (6) / 2 - 5 (7) / 0 - 2 - 2 / 0 - 10 (0) 4 (5) - 10 (0) 4 - 10 (0) 3 (5) - 2. Head (Fig. 11 A): H 1 area with four Mac (An 2, An 3 a 1, An 3 a 2, An 3); H 2 area with one Mac (A 5); H 3 area without Mac; H 4 area with three Mac (S 1, S 3, S 4 i); H 5 area with two Mac (Ps 2 and Ps 5). Mesothorax (Fig. 11 E): area T 1 with four Mac (m 1, m 2, m 2 i, m 2 i 2); T 2 with 5 - 6 Mac (a 5, m 4, m 4 i, m 4 p, m 5 always present, m 4 pi present or absent). Abdomen: Abd II (Fig. 11 F) area A 1 with two Mac (a 2 and a 3); area A 2 with 5 - 7 Mac (m 3, m 3 e, m 3 ep, m 3 ei, m 3 ea always present, m 3 eai and m 3 eai 2 present or absent); Abd III (Fig. 11 G) area A 3 without Mac; area A 4 with two Mac (a 2 and a 3), and area A 5 also with two Mac (m 3 and m 3 e); Abd IV (Fig. 11 H) area A 6 without Mac; area A 7 with unpaired central Mac A 03 present or absent, and with 4 - 5 Mac (A 3, B 2, C 1, E 1 always present; Ae 3 present or absent); area A 8 with unpaired central Mac A 04 present or absent, and with four Mac (A 4 a, Ae 4, B 4, C 2 a); area A 9 with unpaired central Mac A 05 present or absent, and with 3 - 5 Mac (A 5, B 5, and one Mac of uncertain homology always present, Ae 5 p and Ae 5 pp present or absent); and area A 10 with two Mac (A 6 and B 6); sensillar formula from Th II to Abd V: 2,2 / 1,2,2,10,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
6F4164B38B895EA0B29D5BC542B4442A.taxon	description	Figs 7, 8, 9	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
6F4164B38B895EA0B29D5BC542B4442A.taxon	materials_examined	Material examined. Nine topotypic specimens from type locality in Hungary, Simontornya, com. Tolna, Barcsi Valley, hillside with loess steppe meadow, 120 m a. s. l., 46 ° 45 ' 59 " N, 18 ° 31 ' 50 " E, D-vac sample, 10 Aug. 2021 (leg. D. Winkler, N. Szigeti and G. Traser): three ♂♂ on slides (slide numbers as Nr. HNHM-collpr- 915 to HNHM-collpr- 916; and WD-coll- 145); two ♀♀ on slide (slide numbers as Nr. HNHM-collpr- 917; and WD-coll- 146); three juveniles on slide (slide numbers as Nr. HNHM-collpr- 918; WD-coll- 147 to WD-coll- 148), deposited at HNHM, and in the first author's collection at SOE.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
E1174CA12B51513D842DEE4DB290DF77.taxon	description	Figs 12, 13	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
E1174CA12B51513D842DEE4DB290DF77.taxon	materials_examined	Material. Five ♂♂ on two slides (Nr. HNHM-collpr- 922 to Nr. HNHM-coll- 923) preserved at HNHM, Hungary, Szarhalmi forest, Sopron, com. Gyor-Moson-Sop-ron, 47 ° 41 ' 54 " N, 16 ° 38 ' 22 " E, 214 m above sea level. D-vac sample, 13 Oct. 2018, leg. D. Winkler.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
E1174CA12B51513D842DEE4DB290DF77.taxon	description	Description. Habitus. Adult body length 1.73 - 2.05 mm excluding antennae. Body ground colour pale yellow or yellowish brown, with five dark longitudinal stripes: the dorsal and two dorsolateral from Th II to posterior margin of Abd III, lateral ones from Th II to posterior margin of Abd IV. Dorsal and dorsolateral stripes may widen here and there, especially on Th III-Abd III. Abd IV with some irregular patches, anterior part often entirely dark (Fig. 12 A). Ventral body partly or entirely dark in most adult specimens (Fig. 12 B). Violet pigments on antennae with increasing intensity from base to apex of segments. Head. 8 + 8 eyes, GH smaller than EF (Fig. 13 A). Interocular chaetotaxy with five chaetae (s, t, p, q, r). Antennae length 1.11 - 1.20 mm. Antennal length to head diagonal length ratio 2.58 - 2.95 (n = 5). Relation of antennal joints I-IV as 1: 2.1 - 2.3: 1.5 - 2.0: 1.7 - 2.5 (n = 5). Ant IV with bilobated apical bulb. Ant III sensillary organ composed of two sensory rods partially behind a cuticular fold, guarded by three short sensilla. Arrangement of chaetae on labrum 4 / 554, prelabral chaetae ciliated, posterior, median and anterior labral chaetae smooth. Labrum with four rounded labral papillae (Fig. 13 B). Outer maxillary palp with two smooth chaetae and three smooth sublobal chaetae. Curved lateral process on labial papilla E not reaching apex of papilla. Labium chaetotaxy formed by five smooth " a " chaetae and, in basal row, by ciliated chaetae M, R, E, L 1, and L 2 with R smaller than other chaetae (ratio of R / M ~ 0.6). Body. Ratio of Abd IV / III length 3.77 - 4.54 (n = 5). Trochanteral organ with up to 22 spine-like chaetae (Fig. 13 C). Unguis and unguiculus of claw III as in Fig. 13 D. Unguis with sub-equal paired basal teeth at 59 % from the inner edge, and with two more unpaired teeth at 80 % and 92 % from inner edge, respectively. Paired lateral teeth intermediate at level slightly below the paired internal teeth. Unpaired dorsal tooth basal, located approximately at one-quarter of distance from base. A small pretarsal chaeta present on both anterior and posterior surfaces. Unguiculus lanceolate, outer lamella smooth. Tibiotarsal tenent hair clavate, longer than claw. Ratio of smooth terminal chaeta / unguiculus ~ 1. Ventral tube anteriorly with 11 + 11 chaetae (4 + 4 ciliated Mac and 7 + 7 finely ciliated mic) and with 4 + 4 thin, finely ciliated chaetae on posterior side; lateral flap with 3 ciliated and 6 smooth chaetae. Manubrial plate with four chaetae and two pseudopores. Length of not ringed terminal dens ~ 3 x the length of mucro. Mucro with distal tooth equal to anteapical; basal spine just reaching tip of anteapical tooth. Macrochaetotaxy (Fig. 13 A, E-H). Simplified Mac formula: 3 - 1 - 0 - 2 (3) - 2 / 2 - 3 / 2 - 2 / 1 - 2 - 1 / 0 - 4 (5) - 4 - 2 - 2. Head (Fig. 13 A): H 1 area with three Mac (An 2, An 3 a 1, An 3); H 2 area with one Mac (A 5); H 3 area without Mac; H 4 area with 3 Mac (S 1, S 3, S 4 i); H 5 area with two Mac (Ps 2 and Ps 5). Mesothorax (Fig. 13 E): area T 1 with two Mac (m 1 and m 2 i); T 2 with three Mac (a 5, m 4 and m 4 i). Abdomen: Abd II (Fig. 13 F) area A 1 with two Mac (a 2 and a 3); area A 2 also with two Mac (m 3 and m 3 e); Abd III (Fig. 13 G) area A 3 with one Mac (a 1); area A 4 with two Mac (a 2 and a 3), and one Mac (m 3) on A 5; Abd IV (Fig. 13 H) area without Mac; area A 7 with 4 - 5 Mac (A 3 p, Ae 3, C 1, E 1 always present, B 2 present or absent); area A 8 with four Mac (A 4 a, Ae 4, B 4, C 2 a); area A 9 with two Mac (A 5 and B 5); and area A 10 with two Mac (A 6 and B 6). Sensillar formula from Th II to Abd V: 2,2 / 1,2,2,9,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
BF8EAF45DE025E92A6EBEE16636CD03A.taxon	description	Figs 14, 15	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
BF8EAF45DE025E92A6EBEE16636CD03A.taxon	materials_examined	Material. Four ♂♂ and four ♀♀ on three slides (slide numbers as HNHM-collpr- 923 to HNHM-collpr- 924; and WD-coll- 150), ~ 80 specimens in 96 % ethyl alcohol (Vial WD 180). Hungary, Budapest, 307 m asl, 47 ° 29 ' 14 " N, 18 ° 59 ' 23 " E, D-vac sample, 14 Mar. 2023, leg. D. Winkler. Two slides are preserved at HNHM, one slide and the specimens in alcohol are stored at SOE.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
BF8EAF45DE025E92A6EBEE16636CD03A.taxon	description	Description. Habitus. Adult body length up to 3.91 mm excluding antennae. Colour polymorphic. Ground colour usually pale yellow (Fig. 14 A). Transitional form (Fig. 14 B, C) with yellow head and Th II, and dark purple from Th III-Abd IV and dark ventral side not rare. Completely dark form (Fig. 14 D) occasional, with head and body dorsally and ventrally dark purplish black, dark shades also on ventral tube and manubrium. Pattern typically with narrow medial longitudinal stripe extending from Th II to posterior margin of Abd IV. Broad transverse stripe on posterior margin of Abd II, occasionally also with thin transverse stripes on posterior margins of Th II-Abd I and Abd III-IV. Posteriorly on Th II-Abd III, often with irregular or trapezoidal patches along centreline, usually broadest on Abd III. Pattern on darker specimens barely detectable. Head. 8 + 8 eyes, GH smaller than EF, Interocular chaetotaxy with six chaetae (s, t, p, q, r, v) (Fig. 15 A). Antennae length 1.80 - 2.27 mm (n = 7). Antennal length to head diagonal length ratio 2.56 - 3.20 (n = 7). Relation of antennal joints I-IV as 1: 2.1 - 2.3: 1.8 - 2.1: 2.4 - 3.0 (n = 7). Ant IV with bilobed apical bulb. Ant III sensillary organ composed of two sensory rods partially behind a cuticular fold, guarded by three short sensilla. Arrangement of chaetae on the labrum 4 / 554, prelabral chaetae ciliated, posterior, median and anterior labral chaetae smooth. Labrum with four labral papillae with 1 - 3 setulae expansion (Fig. 15 B). Outer maxillary palp with two smooth chaetae and three smooth sublobal chaetae. Lateral process on labial papilla E barely reaching or slightly beyond apex of papilla. Labium chaetotaxy formed by 5 smooth " a " chaetae and, in the basal row, by ciliated chaetae M, R, E, L 1 and L 2 with R smaller than other chaetae (ratio of R / M ~ 0.6). Body. Ratio of Abd IV / III length 4.04 - 5.57 (n = 8). No differentiated chaetae on tibiotarsus III, with exception of the smooth terminal chaeta opposite to tenent hair. Trochanteral organ with up to 33 spine-like chaetae forming a + / - V-shaped pattern. Unguis with sub-equal paired basal teeth at 47 % from the inner edge, and with two more unpaired teeth at 74 % and 87 % from inner edge, respectively. Unpaired dorsal and paired lateral teeth intermediate, at a level below the paired internal teeth. A small pretarsal chaeta present on both anterior and posterior surfaces. Unguiculus lanceolate, outer lamella smooth or serrate (Fig. 15 C). Tibiotarsal tenent hair clavate, ~ 0.8 as long as claw. Ratio of smooth terminal chaeta / unguiculus 0.9. Ventral tube with 30 + 30 ciliated chaetae on anterior side and 19 + 19 ciliated chaetae on posterior side; lateral flap with 12 chaetae. Manubrial plate with three chaetae and two psp. Length of not ringed terminal dens ~ 2.5 x the length of mucro. Mucro with anteapical tooth markedly smaller than apical; basal spine just reaching tip of anteapical tooth (Fig. 15 D). Macrochaetotaxy (Fig. 15 E-H). The studied population can be described by the following abbreviated formula: 3 (4) - 1 (2) - 0 - 3 - 2 / 1 - 4 / 2 - 4 (5) / 1 - 0 - 1 / 4 (5) - 104 (5) - 102 - 102 - 2. Head (Fig. 15 A): H 1 area with 3 - 4 Mac, An 2, An 3 a 1, and An 3 always present, An 3 a 2 present or absent. H 2 area with 1 - 2 Mac, A 5 always present, A 6 present or absent; H 3 area without Mac; H 4 area with three Mac (S 1, S 3, S 4 i); H 5 area with two Mac (Ps 2 and Ps 5). Mesothorax (Fig. 15 E): area T 1 with one Mac (m 2 i 2); T 2 with four Mac (a 5, m 4, m 4 i, m 5). Abdomen: Abd II (Fig. 15 F) area A 1 with two Mac (a 2 and a 3); area A 2 with 4 - 5 Mac (m 3, m 3 e, m 3 ep, m 3 ea always present, m 3 ei present or absent); Abd III (Fig. 15 G) area A 3 with one Mac (a 1); area A 4 without Mac, and area A 5 with one Mac (m 3); Abd IV (Fig. 15 H) area A 6 with 4 - 5 Mac (A 1, B 1, Be 3, D 1 always present, one Mac of uncertain homology present or absent; area A 7 with unpaired central Mac A 03, and with 4 - 5 Mac (A 2, B 2, C 1, E 1 always present; B 3 present or absent); area A 8 with unpaired central Mac A 04, and two Mac (A 4 and B 4); area A 9 with unpaired central Mac A 05, and two Mac (A 5 and B 5); and area A 10 with two Mac (A 6 and B 6); sensillar formula from Th II to Abd V: 2,2 / 1,2,2,14,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Winkler, Daniel, Sternalski, Jakub, Onodi, Gabor, Szigeti, Nora, Florian, Norbert, Danyi, Laszlo (2023): Investigation on the true identity of Entomobrya nigriventris Stach, 1929 (Collembola, Entomobryidae) with the description of a new species. ZooKeys 1185: 321-353, DOI: http://dx.doi.org/10.3897/zookeys.1185.112279, URL: http://dx.doi.org/10.3897/zookeys.1185.112279
