Paravillersia jamaliensis Khaustov, sp. nov.

Paravillersia jamaliensis Khaustov sp. nov.

(Figs. 1–5)

Description. FEMALE (Figs. 1–5). Idiosoma oval in outline. Length of idiosoma 355 (310–370), width 280 (235–280). Idiosomal dorsum (Figs. 1 A, 5A–C). Idiosoma almost completely covered by 3 large and weakly sclerotized shields. Prodorsal and hysterosomal shields with weakly developed dimples in lateral parts. Central parts of prodorsal and hysterosomal shields smooth. Diameter of eyes 9 (8–9). Dorsal setae sparsely barbed, distinctly blunt-ended. Setae f 1, h 1, and h 2 distinctly longer and thicker than other hysterosomal setae. Suranal plate dorsal (Fig. 5 C). Length of dorsal setae: vi 24 (19–24), ve 29 (23–29), sci 21 (15–21), sce 21 (19–21), c 1 21 (18–21), c 2 14 (13–15), d 1 16 (14–16), d 2 16 (14–16), e 1 13 (12–13), e 2 10 (9–10), f 1 31 (30–33), h 1 35 (26–36), h 2 30 (26–31). Distances between setae: vi– vi 50 (48–53), ve–ve 98 (86–100), sci–sci 180 (160–180), c 1– c 1 76 (65–76), d 1– d 1 100 (81–100), d 2– d 2 240 (225–250), e 1– e 1 115 (96–115), e 2– e 2 160 (155–175), f 1– f 1 94 (83–95). Idiosomal venter (Figs. 1 B, 5D, 5F). With 2 pairs of round callosities between hysterosomal and humeral shields (Fig. 5 F). Anterior callosity distinctly larger than posterior one. Endopodal plates separated medially, weakly reticulated. Humeral shields smooth. All ventral setae smooth, pointed. With 2 pairs of subequal aggenital, and 3 pairs of subegual pseudanal setae. Setae ps 1 slightly thicker than ps 2 and ps 3. Striae in centre between coxal fields I-II and III-IV, and posteriorly to subcapitulum with microtubercles (Fig. 5 E). Length of ventral setae: 1 a 23 (22–27), 1 b 19 (19–21), 1 c 13 (12–14), 2 b 11 (11–14), 2 c 12 (12–15), 3 a 30 (24–31), 3 b 12 (11–13), 3 c 11 (11–13), 4 a 18 (14–18), 4 b 10 (9–12), 4 c 10 (10–12), ag 1 10 (9–11), ag 2 10 (9–11), ps 1 17 (16–19), ps 2 11 (10–14), ps 3 12 (11–14). Gnathosoma (Figs. 2, 5 E). Tibial claw well-developed. Setae l’ on palpal tibia spine-like (Fig. 2 A). Setae d on palpal femur distinctly blunt-ended and strongly barbed on distal half, other palpal setae pointed. Palpal supracoxal setae (ep) seta–like. Rostrum of smooth subcapitulum (Figs. 2 B, 5E) very long. Subcapitular setae or 1 smooth, distinctly thickened, curved and blunt-ended; other subcapitular setae simple, pointed. Length of subcapitular setae: m 30 (30–33), n 20 (19–23), or 1 8 (8–9), or 2 14 (13–16). Legs (Figs. 3–4). Empodial raylets capitate. Leg I (Fig. 3 A). Coxae I posterodorsally with seta-like leg supracoxal setae (el). Setae d on tibia and (p), (tc), (ft) on tarsus eupathidia. Setae d on genu and femur distinctly thickened, baculiform, sparsely barbed. Seta k of genu I 11 (11–13) long. Solenidion ω relatively short 15 long (13–15), finger-shaped; solenidion φ 8 long (7–10) baculiform, φp attenuate 21 long (17–23). Leg II (Fig. 3 B). Setae d of tibia, p’ and tc’ of tarsus represented by eupathidia. Setae d on genu, d and l” on femur distinctly thickened, baculiform, sparsely barbed. Solenidion ω 13 long (11–13) finger-shaped; solenidion φ 19 long (16–19), attenuate. Seta k 6 long (6–7). Leg III (Fig. 4 A). Solenidion ω 7 long (6–7), baculiform; solenidion φ 15 long (14–15), attenuate. Setae d on tibia and genu distinctly thickened, baculiform, sparsely barbed. Leg IV (Fig. 4 B). Solenidion ω 4 long (4–5) baculiform; solenidion φ 13 long (15–16) attenuate. Setae d on tibia, genu and femur distinctly thickened, baculiform, sparsely barbed.

MALE and IMMATURES unknown.

Type material. Holotype female, slide № EB 030814, RUSSIA: Yamalo-Nenets Autonomous Okrug, Priuralskiy Region, vicinity of settlement Katravozh, 66 0 19’40”N, 66 0 05’60”E, from mosses on fen, 3 July 2014, coll. E.A. Bragin. Paratypes: 12 females, same data as holotype.

Type deposition. The holotype and 7 paratypes are deposited in the mite collection of the Tyumen State University Museum of Zoology, Tyumen, Russia; 5 paratypes are deposited in the mite collection of the Zoological Institute of Eussian Academy of Sciences, St.-Petersburg, Russia.

Etymology. The new species name refers to Yamal, the large peninsula in Western Siberia where this species was collected.

Differential diagnosis. The new species differs from P. gr a t a by the dorsal position of the suranal plate (vs. ventral in P. gr a t a); by 2 pairs of the aggenital setae (vs. 3 pairs in P. grata), and by distinctly shorter dorsal idiosomal setae c 1, d 1, d 2, e 1, and e 2 (10–16 vs. 20–53 in P. g r at a).