taxonID	type	description	language	source
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	description	Figs 2 A, 3 A – E	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	materials_examined	Type material. Holotype: female on a slide, RUSSIA, Amurskaya Region, Blagoveschensk, sandy bank of Zeya River, on the sand in turf, (50.277257, 127.571377, 117 m a. s. l.), 24. iv. 2018, hand collection, cod. AO 2014 - 41 R- 01. Paratypes (same data as Holotype): 2 on a slide (AO 2014 - 41 R- 02 and 03), and 19 specimens in ethyl alcohol (AO 2014 - 41 R- 04 to 22). Kuznetsova, N. and Potapov, M. leg. Additional material. RUSSIA, Amurskaya Region, Arkhara, under bark of dead willow (coordinates 49.44424, 130.08451, 145 m a. s. l.), 17. viii. 2014, hand collection, 1 female on a slide (AO 2014 - 1 R- 01), Kuznetsova, N. and Potapov, M. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	diagnosis	Diagnosis. The unequivocal identification of the species can only be done using the abbreviated formula of 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) Mc, sensu Jordana & Baquero (2005), as: 4 - 1 - 0 - 3 - 2 / 3 - 4 / 2 - 4 (3) / 0 - 2 - 1 / 0 (4) - 3 - 1 0 4 - 1 0 3 - 4 (5).	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	description	Description. Body length (excluding antennae) 1.95 mm (Holotype); mean for n = 4: 2,07 mm. Ground colour white or very pale, with pigment as antennae darker than the body, three longitudinal stripes on the frontal head, five on Th II – Abd II, seven longitudinal or obliques on Abd III, irregular patches on Abd IV, and final area on Abd VI (Fig. 2 A). Head. Eight eyes, GH slightly smaller than EF (Fig. 3 A). Antennae length 1.28 mm, 3.18 times the length of the head (n = 4); Ant IV with bilobed apical vesicle and pin chaeta present; subapical organite very small; sensory organ of Ant III with the special sensilla long-ovoidal, and three guard additional sensilla; relative length of Ant I / II / III / IV = 1 / 1.25 / 1.01 / 1.15 (n = 4). Prelabral chaetae ciliated. Labral papillae smooth, but triangular in shape. Lateral process of labial papilla E just reaching its apex. Maxillary palp bifurcate, with three sublobal chaetae. Body. Length ratio of Abd IV / III = 6.7 (n = 4). Trochanteral organ with approximately 15 chaetae. Tibiotarsus not sub-segmented, without smooth chaetae, except for a smooth terminal chaeta on leg III. Claw with four inner teeth: paired at 55 % and first unpaired at 80 % from the basis, second unpaired tooth subapical; unpaired dorsal tooth basal (Fig. 3 E). Empodium lanceolate, with slightly serrated external lamella (pe) in leg III. Tenent hair clavate, longer than the claw. Length of manubrium and dens 0.40 and 0.52 mm, respectively (n = 1). Manubrial plate with four chaetae and two pseudopores. Mucro with teeth similar in size, mucronal spine reaching the tip of the subapical tooth; area not crenulated of dens two times the length of mucro. Macrochaetotaxy (Figs 3 A – D). Simplified Mc formula: 4 - 1 - 0 - 3 - 2 / 3 - 4 / 2 - 4 (3) / 0 - 2 - 1 / 0 (4) - 3 - 1 0 4 - 1 0 3 - 4 (5). Head: H 1 area with Mc An 2, An 3 a 1, An 3, and one additional chaeta; H 2 area with Mc A 5; H 4 area with three Mc (S 1, S 3, and S 4 i); H 4 ’ area with three Mc (S 5, S 5 i, and S 4); H 5 area with Ps 2 and Ps 5 Mc. Mesothorax: area T 1 with three Mc (m 1, m 2, and m 2 i); T 2 with four Mc (a 5, m 4, m 4 p, and m 5). Abdomen: Abd II area A 1 with two Mc (a 2 and a 3), area A 2 with four Mc (m 3, m 3 e, m 3 ep, and m 3 eai 2; in one specimen m 3 eai 2 absent); Abd III without Mc on A 3, two Mc on areas A 4 (a 2 and a 3) and one on A 5 (m 3), “ as sensilla present; Abd IV with or without Mc on A 6 area: if present up to four with asymmetric disposition; three Mc on A 7 (A e 3, B 3 and C 1); an unpaired Mc (A 04) and another four on A 8 (A 4, A e 4, B 4 and C 2 a); A 9 with an unpaired Mc (A 05) and three Mc (A 5, A e 5 pp and A i 1); the psp can be at a different location in the same specimen; A 10 with four or five Mc (A i 2, A 6, Ae 7, Ae 8, and B 6); sensillar formula from Th II to Abd V normal as in the rest of Entomobryinae (Zhang & Deharveng 2015): 2,2 / 1,2,2,7 - n, 3; microsensillar formula from Th. II to Abd III: 1,0 / 1,0,1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	biology_ecology	Ecology. The new species was recorded in mass occurrence on a sandy river bank.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	etymology	Etymology. The specific epithet refers to the Amur River, the largest river of the Far East of Russia.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F11FFB2FF2DFD47E8345FBF.taxon	discussion	Remarks. Ten species share with the new species the dorsal macrochaetotaxy of Abd II and III: E. erratica Brown, 1932; E. karlstetterae Baquero & Jordana, 2008; E. koreana Yosii, 1965; E. monopunctata Lee & Park, 1984; E. nana Lee & Park, 1992; E. oleniensis (Tshelnokov, 1987); E. regularis Stach, 1963; E. tokunagai Yosii, 1942; E. vigintiseta Lee & Park, 1984; and E. bicincta Jordana & Baquero sp. nov. (see below). From all of them, E. amurica sp. nov. can be separated for the presence of unpaired Mc on Abd IV (area A 8). From E. monopunctata and E. tokunagai, there is no information about the chaetotaxy of Th II, but they are different in the Mc of Abd IV: 0 - 2 - 1 - 2 - 2 for E. monopunctata and 1 - 3 - 2 - 2 - 2 for E. tokunagai. The only species with the same macrochaetotaxy on T 1 and T 2 on Th II is E. erratica. The remaining have 0 – 2 (E. karlstetterae), 4 – 4 (E. koreana), 3 – 2 (E. nana), 4 – 4 (5) (E. oleniensis), 2 – 4 (E. regularis), 4 – 5 (E. vigintiseta) and 3 – 5 (E. bicincta sp. nov.). E. erratica has 0 – 0 – 3 – 2 – 2 dorsal Mc on Abd IV. The differences in dorsal macrochaetotaxy (reduced formula of Jordana & Baquero 2005) for all these species are shown in the Table 1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	description	Figs 2 B, 4 A – E	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	materials_examined	Type material. Holotype: female on a slide, RUSSIA, Amurskaya Region, ~ 3 km NE Arkhara, top of a hill, dry young oak-forest, litter, (49.47551, 130.12499), 17. viii. 2014, cod AO 2014 - 2 R- 13. Paratypes: same data as Holotype, three females on slide (AO 2014 - 2 R- 14 to 16); 1 female on a slide (AO 2014 - 19 R- 01), Khingansky Reserve, Kundur, in grass turf (49.103646, 130.758800, 168 m a. s. l.), 19. iv. 2018, hand collection. All Potapov, M. and Kuznetsova, N. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	diagnosis	Diagnosis. The unequivocal identification of the species can only be done using the abbreviated formula of 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) Mc, that for it is: 3 - 1 (2) - 0 - 3 - 2 / 3 - 5 / 2 - 4 (3) / 0 - 2 - 1 / 0 - 0 - 2 - 2 - 2.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	description	Description. Body length (excluding antennae) 1.10 mm (n = 1). Ground colour white or very pale, with pigment between the eyes, antennae, front and anterior Th II, more than half posterior Th III, complete dorsal Abd III, two dorsolateral patches on Abd IV, and lateral bands on AbdV – VI. Head. Eight eyes, GH slightly smaller than EF. Antennae length 0.40 mm, 2.05 times the length of the head (n = 1); Ant IV with bilobed apical vesicle and pin chaeta present; subapical organite very small (drumstick shape); sensory organ of Ant III with the special sensilla long-ovoidal, and three guard additional sensilla; relative length of Ant I / II / III / IV = 1 / 2.00 / 2.00 / 3.00 (n = 1). Prelabral chaetae ciliated. Labral papillae almost smooth (a slight irregularity was observed). Lateral process of labial papilla E not reaching its apex. Maxillary palp bifurcate, with three sublobal chaetae. Body. Length ratio of Abd IV / III = 3.75 (n = 1). Trochanteral organ with approximately eight chaetae. Tibiotarsus not sub-segmented, without smooth chaetae, except for smooth terminal chaeta on leg III. Claw with four inner teeth: paired teeth at 50 % from the basis and first unpaired at 75 % from the basis, second unpaired; subapical unpaired dorsal tooth basal (Fig. 4 E). Empodium lanceolate, with smooth external lamella (pe) in leg III. Tenent hair clavate, longer than the claw. Length of manubrium and dens 0.20 and 0.21 mm, respectively (n = 1). Manubrial plate with three chaetae and two pseudopores. Mucro with teeth similar in size, mucronal spine reaching the tip of the subapical tooth; area not crenulated of dens two times the length of mucro. Macrochaetotaxy (Figs 4 A – D). Simplified Mc formula: 3 - 1 (2) - 0 - 3 - 2 / 3 - 5 / 2 - 4 (3) / 0 - 2 - 1 / 0 - 0 - 2 - 2 - 2. Head: H 1 area with Mc An 2, An 3 a 1, and An 3; H 2 area with one Mc (A 5) and sometimes an additional chaeta (A 6); H 4 area with three Mc (S 1, S 3, and S 4 i); H 4 ’ area with three Mc (S 5, S 5 i, and S 4); H 5 area with Ps 2 and Ps 5 Mc. Mesothorax: area T 1 with three Mc (m 1, m 2, and m 2 i); T 2 with five Mc (a 5, m 4, m 4 p, m 4 i, and m 5). Abdomen: Abd II area A 1 with two Mc (a 2 and a 3), area A 2 with four Mc (m 3, m 3 ep, m 3 e, and m 3 ea; one specimen from sample 2 R has lacked Mc m 3 ea); Abd III without Mc on A 3, two on A 4 (a 2 and a 3) and one on A 5 (m 3); Abd IV without Mc on A 6 and A 7 areas, two on A 8 (A 4 and B 4), two on A 9 (A 5 and B 5), two on A 10 (A 6 and B 6); sensillar formula from Th II to Abd V normal as in the rest of Entomobryinae: 2,2 / 1,2,2,7,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	biology_ecology	Ecology. Unknown.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	etymology	Etymology. The specific epithet refers to the pigmented transversal bands on Th III and Abd III.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F15FFB1FF2DFF2AE9155C11.taxon	discussion	Remarks. This species shares the dorsal macrochaetotaxy of Abd II – III with E. amurica sp. nov. Further comparisons are presented in the remarks of the late species (see also Table 1).	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	description	Figs 2 C, 5 A – E	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	materials_examined	Type material. Holotype: female on a slide, RUSSIA, ~ 3 km NE Arkhara, top of hill, dry young oak-forest, litter (49.47551, 130.12499, 242 m a. s. l.), 17. viii. 2014, hand collection, cod. AO 2014 - 2 R- 01. Paratypes (same data as Holotype): 2 females on the slides (AO 2014 - 2 R- 02 and 03) and 9 specimens in ethyl alcohol (AO 2014 - 2 R- 04 to 12); three specimens in ethyl alcohol (AO 2014 - 5 R- 01 to 03). Kuznetsova, N. and Potapov, M. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	diagnosis	Diagnosis. The unequivocal identification of the species can only be done using the abbreviated formula of 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) Mc, as: 3 - 1 - 0 - 3 - 2 / 4 - 5 / 2 - 5 / 0 - 2 - 1 / 1 (2) - 3 - 3 - 4 - 2.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	description	Description. Body length (excluding antennae) 2.50 mm (n = 2), up to 2.70 mm (Paratype). Ground colour pale yellowish, with violet pigment on antennae, and blue pigment on frontal head and the posterior area behind the eyes, lateral Th II – Abd I and lateral posterior Abd II, a dorsocentral line on Th II – Abd III broadening towards the posterior part, and other areas as in Fig. 2 C. Head. Eight eyes, GH smaller than EF (Fig. 5 A). Antennae length 1.50 mm, 2.9 – 3.0 times the length of the head (n = 2); Ant IV with bilobed apical vesicle and bifurcate pin chaeta present; subapical organite very small, as a drumstick, with a smooth chaeta below; sensory organ of Ant III with the special sensilla long-ovoidal, and three guard additional sensilla; relative length of Ant I / II / III / IV = 1 / 1.50 / 1.50 / 2.20 (n = 2). Prelabral chaetae ciliated. Labral papillae smooth and rounded. Lateral process of labial papilla E not reaching its apex. Maxillary palp bifurcate, with three sublobal chaetae. Body. Length ratio of Abd IV / III = 6.60 (n = 1). Trochanteral organ with approximately 25 chaetae. Tibiotarsus not sub-segmented, without smooth chaetae, except for smooth terminal chaeta on leg III. Claw with four inner teeth: paired at 50 % and first unpaired at 75 % from the basis, second unpaired minute and subapical; unpaired dorsal tooth basal (Fig. 5 E). Empodium lanceolate, with serrated external lamella (pe) in leg III. Tenent hair clavate, longer than the claw. Length of manubrium and dens 0.55 and 0.70 mm, respectively (n = 1). Manubrial plate with 13 – 15 chaetae and two pseudopores. Mucro with subapical tooth bigger than the apical one, mucronal spine reaching the tip of the subapical tooth; area not crenulated of dens less than two times the length of mucro. Macrochaetotaxy (Figs 5 A – D). Simplified Mc formula: 3 - 1 - 0 - 3 - 2 / 4 - 5 / 2 - 5 / 0 - 2 - 1 / 1 (2) - 3 - 3 - 4 - 2. Head: H 1 area with Mc An 2, An 3 a 1, and An 3; H 2 area with one Mc (A 5); H 4 area with three Mc (S 1, S 3, and S 4 i); H 4 ’ area with three Mc (S 5, S 5 i, and S 4); H 5 area with Ps 2 and Ps 5 Mc. Mesothorax: area T 1 with four Mc (m 1, m 2, m 2 i, and m 2 i 2); T 2 with five Mc (a 5, m 4, m 4 i, m 4 p, and m 5). Abdomen: Abd II area A 1 with two Mc (a 2 and a 3), area A 2 with five Mc (m 3, m 3 ep, m 3 e, m 3 ea, and m 3 ei 2); Abd III without Mc on A 3, two on A 4 (a 2 and a 3) and one on A 5 (m 3), a 6, m 6, m 7, and p 6 as Mc, ‘ s’ between m 6 and p 6, ‘ ms’ interiorly; Abd IV with one or two Mc on A 6 area (B 1 and sometimes B e 3), three on A 7 (A 3, B 3, and E 1), three on A 8 (A 4, B 4, and C 2 a), four on A 9 (A 5, A e 5 pp, B 5 and an additional under B 5), and two on A 10 (A 6 and B 6; sensillar formula from Th II to Abd V normal as in the rest of Entomobryinae: 2,2 / 1,2,2,7 - n, 3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	biology_ecology	Ecology. Unknown.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	etymology	Etymology. The specific epithet refers to the distinct dorsocentral line on the body.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F14FFBFFF2DFB3BEABE59D1.taxon	discussion	Remarks. Entomobrya mediostriata sp. nov. is similar to four other species that share a similar dorsal macrochaetotaxy of Abd II – III (E. emiliae Furgoł, 2017; E. pulcherrima Yosii, 1942; E. leviseta Ma & Shi, 2018, and E. umbroviolacea sp. nov.). E. emiliae has a different formula for Th II (3 - 6) and Abd IV 6 - 1 0 4 - 1 - 1 (2) - 4), labral papillae with a projection but not seta-like, a different shape for the claw (dorsal tooth not basal), and external empodium smooth; E. pulcherrima has a different macrochaetotaxy formula for the head and Abd IV (0 - 0 - 2 - 2 - 3), labral papillae simple and smooth, antennal apical vesicle simple and a significantly different number of Mc on the manubrial plate. E. leviseta has a different macrochaetotaxy formula for the head (and the formula for Abd IV is plurichaetotic (35 – 46 Mc) and eyes GH similar in size to EF. The color pattern is too very different when all these species are compared. From the separation of E. umbroviolacea sp. nov. see the remarks for this late species below.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	description	Figs 2 D, 6 A – F	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	materials_examined	Type material. Holotype: female on a slide, RUSSIA, Amurskaya Region, Zeysky Reserve, ~ up from 52 km of road Zeya-Beregovoy, “ 52 km ” station, the valley of Bolshaya Erakingra River, forest, under bark (coordinates 54.085668, 126.873681, 604 m a. s. l.), 21. vii. 2014, hand collection, cod. AO 2014 - 28 R- 01. Paratypes (same data as Holotype): one female on a slide (AO 2014 - 28 R- 02). Kuznetsova, N. and Potapov, M. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	diagnosis	Diagnosis. The unequivocal identification of the species can only be done using the abbreviated formula of 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) Mc, that for it is: 3 - 1 - 0 - 3 - 3 / 4 - 7 / 2 - 5 / 0 - 2 - 1 / 0 - 2 - 1 - 2 - 2.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	description	Description. Body length (excluding antennae) 1.78 mm (Holotype). Ground colour intense violet, darker on the frontal head, a fine posterior area behind the eyes and antennae; there are some small paler patches on anterior Abd IV (Fig. 2 D). Head. Eight eyes, GH slightly smaller than EF (Fig. 6 A). Antennae length 0.80 mm, 2.03 times the length of the head (n = 1); Ant IV with bilobed apical vesicle and pin chaeta present; subapical organite very small (drumstick shape); sensory organ of Ant III with the special sensilla long-ovoidal, and three guard additional sensilla; relative length of Ant I / II / III / IV = 1 / 2.00 / 2.40 / 2.70 (n = 1). Prelabral chaetae ciliated. Labral papillae with a long projection. Maxillary palp bifurcate, with three sublobal chaetae. Body. Length ratio of Abd IV / III = 6.9 (n = 1). Trochanteral organ with approximately 16 chaetae. Femur III with at least eight smooth chaetae as shown in Fig. 6 B. Tibiotarsus slightly sub-segmented, without smooth chaetae (a double row of wide chaetae with appressed ciliation is present), except for smooth terminal chaeta on leg III. Claw with four main teeth: inner paired at 50 – 60 % and first unpaired at 75 % from the basis, second unpaired minute and subapical; unpaired dorsal tooth basal. Empodium lanceolate, with almost smooth external lamella (pe) in leg III (two or three small indentations present). Tenent hair clavate (Fig. 6 C). Length of manubrium and dens 0.35 and 0.40 mm, respectively (n = 1). Manubrial plate with four chaetae and two pseudopores. Mucro with teeth similar in size, mucronal spine reaching the tip of the subapical tooth; area not crenulated of dens three times the length of mucro. Macrochaetotaxy (Figs 6 A, D – F). Simplified Mc formula: 3 - 1 - 0 - 3 - 3 / 4 - 7 / 2 - 5 / 0 - 2 - 1 / 0 - 2 - 1 - 2 - 2. Head: H 1 area with Mc An 2, An 3 a 1, and An 3; H 2 area with one Mc (A 5); H 4 area with three Mc (S 1, S 3, and S 4 i); H 4 ’ area with three Mc (S 5, S 5 i, and S 4); H 5 area with Ps 2, Ps 3, and Ps 5 as Mc. Mesothorax: area T 1 with four Mc (m 1, m 2, m 2 i, and m 2 i 2); T 2 with seven Mc (a 5, m 4, m 4 i, m 4 p, m 4 pi, and m 5; an additional Mc is present near m 4 i and m 4 pi). Abdomen: Abd II area A 1 with two Mc (a 2 and a 3), area A 2 with five Mc (m 3, m 3 ep, m 3 e, m 3 ea, and m 3 ei); Abd III without Mc on A 3, two Mc on areas A 4 (a 2 and a 3) and one on A 5 (m 3); Abd IV without Mc on A 6 area (B 1 and B e 3 as mes and could be confused with Mc), two on A 7 (A 3 and B 3), one on A 8 (B 4), two on A 9 (A 5 and B 5), and two on A 10 (A 6 and B 6); sensillar formula from Th II to AbdV normal as in the rest of Entomobryinae: 2,2 / 1,2,2,7,3; microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	biology_ecology	Ecology. Unknown.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	etymology	Etymology. The specific epithet refers to the uniform violet colour.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1AFFBCFF2DFDFBEB525989.taxon	discussion	Remarks. E. umbroviolacea sp. nov. is similar to four other species that share a similar dorsal macrochaetotaxy of Abd II – III (E. emiliae; E. pulcherrima; E. leviset a; and E. mediostriata sp. nov.). E. emiliae has a different formula for the head (3 - 2 - 0 - 3 - 2), Th II and Abd IV (3 - 6), labral papillae with a projection but not seta-like, shorter antennae, and a different shape for the claw (dorsal tooth not basal); E. pulcherrima has a different macrochaetotaxy formula for the head (4 - 1 - 0 - 3 - 2), Th II (4 - 4) and Abd IV (0 - 0 - 2 - 2 - 3), labral papillae simple and smooth, antennal apical vesicle simple, a different number of Mc on the manubrial plate and subapical tooth of mucro bigger than the apical one. E. leviseta has a different macrochaetotaxy formula for the head (3 - 1 - 0 - 3,1 b), (the dorsal Abd IV is plurichaetotic, and eyes GH similar in size to EF. The color pattern is too very different when all these species are compared.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	description	Figs 2 E, 7 A – F	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	materials_examined	Type material. Holotype: female on a slide, RUSSIA, Amurskaya Region, Arkhara, under the bark of dead willow (coordinates 49.44424, 130.08451, 145 m a. s. l.), 17. viii. 2014, hand collection, cod. AO 2014 - 1 R- 02. Paratypes (same data as Holotype): one male on the same slide of the holotype (AO 2014 - 1 R- 03), and six specimens in ethyl alcohol (AO 2014 - 1 R- 04 to 09). Kuznetsova, N. and Potapov, M. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	diagnosis	Diagnosis. The unequivocal identification of the species can only be done using the abbreviated formula of 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) Mc, as: 3 - 1 - 0 - 3 - 2 / 1 - 4 / 1 - 3 / 0 - 2 - 1 / 0 - 2 - 1 - 2 - 2.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	description	Description. Body length (excluding antennae) 2.24 mm (n = 1). Ground colour white or very pale, with pigment on the frontal head, antennae, lateral Th II – Abd III and Abd IV, all Th III and AbdV, dorsal Abd III, partially Abd IV, mid posterior AbdV (Fig. 2 E). Scales on dorsal head and dorsal body, 1 + 1 on anterior VT, and on anterior manubrium. Head. Eight eyes, GH slightly smaller than EF (Fig. 7 A). Antennae length 1.29 mm, 2.68 times the length of the head (n = 1); Ant IV with bilobed apical vesicle and a long pin chaeta present; subapical organite very small; sensory organ of Ant III with the special sensilla long-ovoidal, and three guard additional sensilla; relative length of Ant I / II / III / IV = 1 / 1.50 / 1.75 / 2.20 (n = 1); antennae without scales. Prelabral chaetae ciliated. Labral papillae triangular, with a long projection. Lateral process of labial papilla E not or just reaching its apex. Maxillary palp bifurcate, with three sublobal chaetae. Body. Length ratio of Abd IV / III = 4.0 (n = 1). Scale sculpture type B (short rib type, narrow scales, following Zhang et al. 2011) as in Fig. 7 E. Trochanteral organ triangular, with approximately 25 chaetae. Tibiotarsus not sub-segmented, without smooth chaetae, except for smooth terminal chaeta on leg III. Claw with four inner teeth: paired at 50 % and first unpaired at 75 % from the basis, second unpaired sub apical; unpaired dorsal tooth not totally basal, but far of the level of lateral ones (Fig. 7 F). Empodium lanceolate, with serrated external lamella (pe) in leg III. Tenent hair clavate, longer than the claw. Length of manubrium and dens 0.50 and 0.60 mm, respectively (n = 1). Manubrial plate with four chaetae and two pseudopores. Mucro with teeth similar in size, mucronal spine reaching the tip of the subapical tooth; area not crenulated of dens three times the length of mucro. Macrochaetotaxy (Figs 7 A – D). Simplified Mc formula: 3 - 1 - 0 - 3 - 2 / 1 - 4 / 1 - 3 / 0 - 2 - 1 / 0 - 2 - 1 - 2 - 2. Head: H 1 area with Mc An 2, An 3 a 1, and An 3; H 2 area with one Mc (A 5); H 4 area with three Mc (S 1, S 3, and S 4 i); H 4 ’ area with three Mc (S 5, S 5 i and S 4); H 5 area with Ps 2 and Ps 5 Mc. Mesothorax: area T 1 with one Mc (m 1); T 2 with four Mc (a 5, m 4, m 4 i, and m 5). Abdomen: Abd II area A 1 with one Mc (a 2), area A 2 with three Mc (m 3, m 3 ep, and m 3 e); Abd III without Mc on A 3, two on A 4 (a 2 and a 3) and one on A 5 (m 3); Abd IV without Mc on A 6 area, two on A 7 (A 3 and B 3), one on A 8 (B 4), two on A 9 (A 5 and B 5), and two on A 10 (A 6 and B 6); sensillar formula from Th II to Abd V normal as in the rest of Entomobryinae: 2,2 / 1,2,2,7 - n, 3, microsensillar formula from Th II to Abd III: 1,0 / 1,0,1.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	biology_ecology	Ecology. Accordingly to the most congeners (bark of the trees).	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	etymology	Etymology. The specific epithet refers to Marina Babykina, the researcher of Khingansky Reserve. Her friendly assistance helped us to collect the material this paper is based on.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F19FFBBFF2DF8A4E8405D29.taxon	discussion	Remarks. The macrochaetotaxy of Abd II – III is usually very stable within Willowsia, allowing species to be easily differentiated (Jordana & Baquero 2005). None of the known species of Willowsia with dorsal macrochaetotaxy formula described shares the formula for Abd II – III with this new species, and only for two species from the Palaearctic region this formula is unknown (W. brahma Imms, 1912 incerta sedis; W. yamashitai Uchida, 1969). The species that share with W. babykinae sp. n. the number and position of the dorsal Mc of Abd III are: W. fascia Pan & Zhang, 2016 (Hubei, Province, China); W. nigromaculata (Lubbock, 1873) Shoebotham, 1917 (Holarctic); W. nivalis Yosii, 1971 (= W. brahmides Yosii, 1966) (Himalaya); W. potapovi Zhang, Chen & Deharveng, 2011 (Caucasus, Azerbaijan); W. pseudosocia Stach, 1965 (Zhang 2015) (Vietnam); W. qui Zhang, Chen & Deharveng, 2011 (Zhejiang Prov., China); W. samarkandica Martynova, 1972 (Uzbekistan); W. similis Pan & Zhang, 2016 (Hunan Prov., China); W. yiningensis Zhang, Chen & Deharveng, 2011 (Xinjiang Prov., China); and W. zhaotongensis Chai & Ma, 2017 (Yunnan Province, China). Only three species share the number of Mc on Th II area T 1: the new species, W. pseudobuski Pan & Zhang, 2016 and W. similis, but the rest of the dorsal macrochaetae formula allows its differentiation. The differences in dorsal macrochaetotaxy (reduced formula of Jordana & Baquero 2005) for all these species are shown in Table 2.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1EFFBBFF2DFAE3E9B25F55.taxon	materials_examined	Material studied. RUSSIA, Amurskaya Region: ~ 3 km NE Arkhara, top of hill, dry young oak-forest, litter (49.47551, 130.12499, 242 m a. s. l.), 17. viii. 2014, hand collection, one female on a slide (AO 2014 - 2 R- 17) and 16 specimens in ethyl alcohol (AO 2014 - 2 R- 18 to 27, AO 2014 - 5 R- 04 to 09); Khingansky Reserve, near (3 km W) Kundur, the valley of Karapcha River, S slope, dry oak forest, under bark (49.11279, 130.72959, 185 m a. s. l.), 19. viii. 2014, hand collection, two specimens in ethyl alcohol (AO 2014 - 16 R- 01 and 02); Khingansky Reserve, Kundur, (49.103646, 130.758800, 168 m a. s. l.), 19. viii. 2014, hand collection in pools on road, seven specimens in ethyl alcohol (AO 2014 - 18 R- 01 to 07), in grass turf, seven specimens in ethyl alcohol (AO 2014 - 19 R- 02 to 08); Zeysky Reserve, ~ up from 52 km of road Zeya-Beregovoy, near “ Gol’tsy ” station, on the bark of birch (54.1239, 126.93059, 1360 m a. s. l.), 20. viii. 2014, hand collection, one specimen juvenile in ethyl alcohol (AO 2014 - 20 R- 01); and Blagoveschensk, sandy bank of Zeya River, on the sand in turf (50.277257, 127.571377, 117 m a. s. l.), 24. viii. 2014, hand collection, one female on a slide (AO 2014 - 41 R- 23) and seven in ethyl alcohol (AO 2014 - 41 R- 24 to 30). All Potapov, M. and Kuznetsova, N. leg.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
03F2A8555F1EFFBBFF2DFAE3E9B25F55.taxon	biology_ecology	Ecology. The species appears to be eurytopic in the Amurskaya Region.	en	Baquero, Enrique, Potapov, Mikhail, Jordana, Rafael (2021): New species and a new record of Entomobryinae (Collembola, Entomobryomorpha) from Amurskaya Region (the Far East of Russia). Zootaxa 4969 (1): 119-134, DOI: https://doi.org/10.11646/zootaxa.4969.1.6
