Paravillersia jamaliensis Khaustov, sp. nov.

• Main Author: Khaustov, Alexander A.
• Format: Text
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Prostigmata; Stigmaeidae; Paravillersia; Paravillersia jamaliensis; Katravozh; Seta; nenets; Nenets Autonomous Okrug; Yamalo Nenets; Yamalo-Nenets Autonomous Okrug; Mite; Siberia
• Online Access: https://dx.doi.org/10.5281/zenodo.6125482; https://zenodo.org/record/6125482

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, 5 A–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, 5 D, 5 F). 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, 5 E) 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 ). : Published as part of Khaustov, Alexander A., 2014, A new species of the genus Paravillersia (Acari: Prostigmata: Stigmaeidae) from Western Siberia, with supplementary description of Paravillersia grata Kuznetsov, 1978 in Zootaxa 3873 (1) , DOI: 10.11646/zootaxa.3873.1.5, http://zenodo.org/record/228781