taxonID	type	description	language	source
03C97D25AD07FF82FF6E6155B6EAFEC6.taxon	materials_examined	Type species: Pygmephorus mesembrinae Canestrini, 1881, by original designation.	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD07FF8BFF6E61B8B5ECFEF0.taxon	description	Description. PHORETIC FEMALE (Figs. 1 – 4). Length of idiosoma 240, width 130. Gnathosoma (Figs. 1, 2). Gnathosomal capsule slightly widened distally, dorsally with 2 pairs of simple setae. Setae cha (9) slightly shorter than chb (10). Dorsal median apodeme present. Ventrally gnathosoma with 1 pair of subcapitular setae m (10). Palps freely articulated to gnathosomal capsule, with setae dFe and dGe dorsolaterally. Setae dGe slightly longer than dFe. Palpal tibiotarsus ventrally with large accessory setigenous structure (ass) and well-developed solenidion. Palps terminated with a small claw. Pharyngeal pump I small, situated on the level of posterior margins of trochanters I; pharyngeal pumps 2 and 3 well-developed, subequal in length, situated closely to each other (Fig. 2). Idiosomal dorsum (Fig. 1 A). Prodorsum with 3 pairs of setae, a pair of smooth capitate trichobothria, and one pair of oval one-chambered stigmata. All dorsal shields with numerous small dimples. Setae h 2 small, smooth, needle-like, other dorsal setae distinctly barbed and blunt-ended. Cupules ia on tergite D and ih on tergite H large, round. Cupules im on tergite EF not evident. An unusualy large well-sclerotized projection present inside body, beginning at posterior margin of body and reaching almost level of setal bases h 1. Lengths of dorsal setae: v 1 20, v 2 12, sc 2 49, c 1 41, c 2 40, d 41, e 18, f 50, h 1 52, h 2 5. Distances between setae: v 1 – v 1 8, v 2 – v 2 24, sc 2 – sc 2 26, c 1 – c 1 39, c 1 – c 2 22, d – d 72, e – f 12, f – f 57, h 1 – h 1 54, h 1 – h 2 9. Idiosomal venter (Fig. 1 B). All ventral plates with numerous small dimples. All setae of anterior and posterior sternal plates smooth, needle-like. Setae ps 2 barbed, blunt-ended. Setae ps 1 and ps 3 subequal, blunt-ended, ps 1 displaced distinctly anteriorly from bases of setae ps 2 and ps 3. Setae 1 c and 2 c absent. Apodemes 1 (ap 1) and apodemes 2 (ap 2) well developed and joined with prosternal apodeme (appr); appr and sejugal (apsej) apodemes well developed; apodemes 3 well developed, arch-like. Apodemes 4 (ap 4) well developed and long, apodemes 5 present, reaching posteriad bases of setae 4 a, weakly sclerotized. Posterior margin of posterior sternal plate with lobe in medial part. Posterior margin of aggenital plate almost v-shaped. Genital sclerite unusually small, bell-like, situated close to posterior margin of posterior sternal plate. Length of ventral setae: 1 a 12, 1 b 12, 2 a 15, 2 b 11, 3 a 10, 3 b 10, 3 c 14, 4 a 11, 4 b 14, 4 c 16, ps 1 4, ps 2 17, ps 3 4. Legs (Figs. 3, 4). Leg chaetotaxy typical for the genus, except the absence of setae v’ on trochanter IV. Leg I (Fig. 3 A). Tibiotarsus cylindrical, tarsal claw terminal. Length of solenidia ω 1 8> ω 2 3 <φ 1 8> φ 2 4; ω 2 and φ 2 baculiform, φ 1 clavate, ω 1 finger-shaped. Seta dFe spatulate distally. Seta k unusually long and pointed. Setae l’, l ” of genu, l’ of femur and v’ of trochanter blunt-ended. Leg II (Fig. 3 B). Tarsus with padded claws bifurcated at the tips and well-developed tongue-like empodium. Solenidion ω (5) finger-shaped, solenidion φ (4) weakly clavate. Setae v’ of trochanter, u’ of tarsus and all setae of femur blunt-ended. Leg III (Fig. 4 A). Claws of same shape as on tarsus II. Solenidion φ (4) weakly clavate. Setae v’ of trochanter, u’ of tarsus and all setae of femur blunt-ended. Femur divided into basi- and telofemur. Leg IV (Fig. 4 B). Tarsal claws simple, empodium small. Solenidion φ (3), weakly clavate. Setae of femur blunt-ended. Femur divided into basi- and telofemur. NON-PHORETIC FEMALE (Figs. 5, 7). Length of idiosoma 190 – 240 in 7 patratypes, width 120 – 140. Gnathosoma and pharyngeal pumps as in phoretic female. Length of setae: cha 8 – 12, chb 9 – 12, m 8 – 9. Idiosomal dorsum (Fig. 5 A). Similar with that of phoretic female, but dorsal setae v 1 shorter, subequal with v 2. Lengths of dorsal setae: v 1 12 – 17, v 2 11 – 14, sc 2 23 – 33, c 1 20 – 30, c 2 21 – 31, d 24 – 30, e 11 – 13, f 23 – 33, h 1 28 – 34, h 2 4 – 5. Distances between setae: v 1 – v 1 6 – 7, v 2 – v 2 18 – 23, sc 2 – sc 2 19 – 22, c 1 – c 1 35 – 37, c 1 – c 2 19 – 24, d – d 61 – 73, e – f 6 – 11, f – f 50 – 64, h 1 – h 1 47 – 57, h 1 – h 2 5 – 8. Idiosomal venter (Fig. 5 B). Similar with that of phoretic female. Lengths of ventral setae: 1 a 8 – 11, 1 b 9 – 11, 2 a 10 – 12, 2 b 8 – 9, 3 a 8 – 11, 3 b 8 – 10, 3 c 11 – 13, 4 a 8 – 10, 4 b 10 – 12, 4 c 10 – 13, ps 1 3 – 4, ps 2 11 – 16, ps 3 3 – 4. Legs (Figs. 6, 7). Leg I (Fig. 6 A) 5 - segmented. Tarsus I tapered distally, with simple sickle-like claw. Setae d of femur I long, not modified. Length of solenidia ω 1 7 – 10> ω 2 4 – 5 <φ 1 5 – 6 = φ 2 5 – 8; ω 2 and φ 2 baculiform, φ 1 clavate, ω 1 finger-shaped. Setae v’ of trochanter blunt-ended. Leg II (Fig. 6 B). Tarsus with simple sickle-like claws and well-developed empodium; empodium with distinct incision at the tip. Tarsus II with 7 setae (u ” present). Solenidion ω (5 – 7), finger-shaped, solenidion φ (3 – 4) weakly clavate. All setae of femur and v’ of trochanter bluntended. Leg III (Fig. 7 A). Claws of same shape as on tarsus II. Tarsus III with 7 setae (u ” present). Solenidion φ (3 – 4) weakly clavate. Setae of trochanter and femur blunt-ended. Leg IV (Fig. 7 B). Similar to that of a phoretic female. Setae of femur blunt-ended. MALE and LARVA unknown.	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD07FF8BFF6E61B8B5ECFEF0.taxon	materials_examined	Type material. Phoretic female holotype, slide AK 151114, RUSSIA: Tyumen Province, Tyumen, in rotten log of poplar (Populus nigra), 57 o 09 ’ 52.3 ” N, 65 o 31 ’ 01.6 ” E, 15 November 2014, coll. A. A. Khaustov. Paratypes: 7 non-phoretic females, same data.	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD07FF8BFF6E61B8B5ECFEF0.taxon	etymology	Etymology. The new species is named for the Russian acarologist Sergey Ermilov for his contribution to science. Differential diagnosis. The phoretic female of a new species is most similar to P. subarcanus Gao and Zou, 2000 by the absence of setae 1 c and 2 c, presence of apodemes 5, one-chambered stigmata, absence of setae v’ on trochanter IV. It differs from P. subarcanus by the setae e barbed and more than 3 times longer than h 2 (vs. smooth and subequal with h 2 in P. subarcanus), setae v 1 less than two times longer than setae v 2 (vs. more than 3 times longer than v 2), by cylindrical tibiotarsus I (vs. distinctly widened in basal part), and by the presence of setae ps 1 (vs. absent).	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD0FFF8FFF6E6730B69CFBD5.taxon	description	Description. PHORETIC FEMALE (Figs. 8 – 11). Length of idiosoma 280 (270 – 300 in 7 paratypes), width 130 (125 – 140). Gnathosoma (Figs. 8 – 9). Gnathosoma similar to that of P. ermilovi sp. nov., but dorsal gnathosomal setae needle-like and dorsal gnathosomal apodeme absent. Setae cha 7 (7 – 9) subequal to chb 8 (7 – 8). Setae m 9 (9 – 10). Pharyngeal pump I small, situated inside gnathosomal capsule; pharyngeal pumps 2 and 3 well-developed, subequal, situated closely to each other (Fig. 9). Idiosomal dorsum (Fig. 8 A). Prodorsum with 3 pairs of setae, a pair of smooth capitate trichobothria, and 1 pair of oval one-chambered stigmata. All dorsal shields with numerous small dimples. Setae e and h 2 small smooth, needle-like, other dorsal setae distinctly barbed. Setae c 2 pointed, other dorsal setae blunt-ended. Cupules ia on tergite D and ih on tergite H large, round. Cupules im on tergite EF weakly discernible. Setae e situated distinctly anteriorly to bases of setae f. Setae c 1 situated distinctly anterior to setae c 2. Length of dorsal setae: v 1 27 (26 – 32), v 2 24 (22 – 26), sc 2 53 (51 – 56), c 1 33 (32 – 42), c 2 58 (55 – 65), d 39 (38 – 43), e 7 (7 – 8), f 42 (42 – 45), h 1 36 (34 – 40), h 2 7 (7 – 8). Distances between setae: v 1 – v 1 9 (9 – 10), v 2 – v 2 19 (18 – 21), sc 2 – sc 2 34 (33 – 36), c 1 – c 1 46 (45 – 51), c 1 – c 2 25 (23 – 28), d – d 77 (74 – 86), e – f 6 (6 – 8), f – f 76 (76 – 83), h 1 – h 1 66 (65 – 72), h 1 – h 2 5 (5 – 6). Idiosomal venter (Fig. 8 B). All ventral plates with numerous small dimples. All setae of anterior and posterior sternal plates smooth, needle-like. Setae ps 2 barbed, blunt-ended. Setae ps 1 and ps 3 subequal, blunt-ended. Ap 1 and ap 2 well developed and joined with appr; appr and apsej well developed; ap 3 well developed, arch-like. Ap 4 well developed and long, ap 5 absent. Posterior margin of posterior sternal plate tripartite. Posterior margin of aggenital plate almost v-shaped. Genital sclerite long and narrow, with lateral projection. Lengths of ventral setae: 1 a 10 (10 – 11), 1 b 14 (14 – 16), 1 c 13 (12 – 14), 2 a 14 (12 – 14), 2 b 14 (13 – 14), 2 c 9 (8 – 9), 3 a 12 (11 – 12), 3 b 10 (10 – 12), 3 c 15 (14 – 16), 4 a 11 (11 – 12), 4 b 16 (1517), 4 c 14 (14 – 15), ps 1 5 (5 – 6), ps 2 26 (24 – 26), ps 3 5 (5 – 6). Legs (Figs. 10 – 11). Leg setation typical for genus. Leg I (Fig. 10 A). Tibiotarsus cylindrical, tarsal claw terminal. Lengths of solenidia ω 1 6 (6 – 7)> ω 2 5 (5 – 6) = φ 1 5 (5 – 7) = φ 2 5 (5 – 6); ω 2 and φ 2 baculiform, φ 1 clavate, ω 1 finger-shaped. Setae dFe spatulate distally. Setae k blunt-ended. Seate l’, l ” of genu, l’ of femur and v’ of trochanter blunt-ended. Leg II (Fig. 10 B). Tarsus with padded claws bifurcate at tips and well-developed empodium. Solenidion ω 5 (5 – 6) finger-shaped, solenidion φ 3 (3) weakly clavate. Setae v’ of trochanter, u’ of tarsus and d of femur blunt-ended. Leg III (Fig. 11 A). Claws of same shape as on tarsus II. Solenidion φ 3 (3) weakly clavate. Setae u’ of tarsus and all setae of femur blunt-ended. Femur divided into basi- and telofemur. Leg IV (Fig. 11 B). Tarsal claws simple, empodium small. Solenidion φ 3 (3), weakly clavate. Setae v’ of trochanter, d of femur, d and v ” of tibia blunt-ended. Femur divided into basi- and telofemur. MALE and LARVA unknown.	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD0FFF8FFF6E6730B69CFBD5.taxon	materials_examined	Type material. Female holotype, slide AK 170514, RUSSIA, Tyumen Province, vicinity of Tyumen, in rotten log of birch (Betula pendula), 57 o 09 ’ 50.5 ” N, 65 o 27 ’ 24.2 ” E, 17 May 2014, coll. A. A. Khaustov; paratypes: 7 phoretic females, same data.	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
03C97D25AD0FFF8FFF6E6730B69CFBD5.taxon	etymology	Etymology. The name of the new species is referring to habitat of a new species in the rotten wood. Differential diagnosis. Phoretic females of a new species are most similar to P. mesembrinae (Canestrini, 1881) based on redescription of P. mesembrinae by Camerik et al. (2006) by the absence of apodemes 5, three pairs of setae on coxal fields I and II, one-chambered stigmata, subequal and smooth setae e and h 1, subequal setae 2 a and 2 b, setae c 2 distinctly longer than c 1. It differs from P. mesembrinae by the position of setae e distinctly anterior to bases of setae f (vs. situated slightly posterior to bases of setae f in P. mesembrinae) and by the position of setae c 1 distinctly anterior to setae c 2 (vs. situated distinctly posterior to c 2).	en	Khaustov, Alexander A. (2015): Two new species of the genus Pediculaster (Acari: Pygmephoridae) from Western Siberia, Russia. Zootaxa 3926 (3): 413-429, DOI: 10.11646/zootaxa.3926.3.6
