Nasutidania orientalis, Khaustov & Frolov, 2018

Khaustov, Alexander A. & Frolov, Andrey V., 2018, New taxa of pygmephoroid mites (Acari: Pygmephoroidea: Pygmephoridae, Neopygmephoridae) phoretic on Enoplotrupes sharpi (Coleoptera: Geotrupidae) from Thailand, Zootaxa 4442 (2), pp. 277-292 : 285-287

Nasutidania orientalis sp. nov.

( Figs. 6–10 )

Description. FEMALE ( Figs 6–10 ). Length of idiosoma 185 (190–220), width 105 (110–125).

Gnathosoma ( Fig. 7 ). Length of gnathosoma 57 (57–59), width 21 (21–23). Dorsal median apodeme well developed. Cheliceral setae smooth and pointed. Setae сha 8 (8–13) distinctly shorter than сhb 14 (14–18). Postpalpal setae (pp) short, needle-like, situated anterolaterally to bases of сha. Setae dFe very short, needle-like; setae dGe, smooth and pointed. Subcapitular setae m 9 smooth and pointed.

Idiosomal dorsum ( Figs 6A , 10A, C, E, G ). All dorsal shields with numerous very small dimples ( Figs 10A, C, E, G ). Setae v 2 smooth, other dorsal setae barbed. Setae v 2, sс 2, с 2, and h 2 pointed, other dorsal setae moderately blunt-ended. Trichobothria with long stem, clavate, sparsely barbed, with pointed apex. Tergite C with two pairs of porous areas, one of which located between setae с 1 and с 2, and another pair located anteromedially to bases of с 1; tergite H with a pair of round porous areas in anterior part covered by tergite EF. Posterior margin of tergite H evenly rounded. Lengths of dorsal setae: v 2 8 (7–8), sс 2 48 (51–53), с 1 46 (45–49), с 2 58 (55–59), d 43 (45–47), e 24 (24–26), f 58 (60–62), h 1 58 (60–61), h 2 57 (57–60). Distances between setae: v 2 –v 2 26 (26–28), sс 2 –sс 2 30 (28–31), с 1– с 1 50 (49–52), с 1– с 2 19 (19–21), d–d 48 (50–52), e–f 9 (9–10), f–f 48 (51–53), h 1– h 1 29 (30–31), h 1– h 2 9 (9–10).

Idiosomal venter ( Figs 6B , 10B, D, F, H, I ). Ventral plates with numerous very small dimples ( Figs 10B, D, F, H ). All ventral setae pointed. Setae 1 a, 1 b, and 2 a barbed, other ventral setae smooth. Posterior margin of aggenital plate straight. Mgs very large, round, weaker sclerotized than ags and pgs ( Fig. 10I ). Lengths of ventral setae: 1 a 24 (27–29), 1 b 23 (27–29), 2 a 26 (30–31), 2 b 17 (19–21), 3 a 26 (20–22), 3 b 23 (22–25), 3 с 20 (20–22), 4 a 17 (19–22), 4 b 29 (30–33), 4 с 22 (23–26), ps 1, 2 26 (25–29), ps 3 19 (21–22).

Legs ( Figs. 8 , 9 ). Leg I ( Fig. 8A ). Lengths of solenidia ω 1 9 (9–10), ω 2 4 (3–4), φ 1 9 (9), φ 2 4 (4–5); φ 1 thick, clavate, ω 1 finger-shaped, ω 2 and φ 2 weakly clavate; ω 2 not striated. Seta l’ of femur short and blunt-ended; other leg setae (except eupathidia) pointed. Setae l’ of femur and k smooth; other leg setae (except eupathidia) barbed. Leg II ( Fig. 8B ). Tarsus with symmetrical padded claws and flipper-like empodium. Solenidia ω 7 (6–7) and φ 4 (4) weakly clavate. Seta d of femur blunt-ended; other leg setae pointed. Setae l’ of femur and tс” of tarsus smooth; other leg setae barbed. Trochanter with short spine-like projection near base of seta v’. Leg III ( Fig. 9A ). Claws and empodium as on tarsus II. Solenidion φ 4 (4) weakly clavate. All leg setae barbed. Seta d of femur blunt-ended; other leg setae pointed. Leg IV ( Fig. 9B ). Tarsus with symmetrical simple hooked claws and small flipper-like empodium. Solenidion φ 4 (4) weakly clavate. All leg setae barbed. Setae d of femur and v” of tibia blunt-ended; other leg setae pointed. Trochanter with short dorsal u-like projection.

MALE and LARVA unknown.

Type material. Female holotype, slide ZISP T-Neop-001, Thailand, Chiang Mai, Mae Ai , VII.1992, N.Kagana ; paratypes: 24 females, same data .

Type deposition. The holotype and four paratypes are deposited in the collection of the Zoological Institute of RAS, Saint Petersburg, Russia ; 20 paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen, Russia.

Etymology. The name of the new species refers to its distribution in the Oriental region.

Figures

FIGURE 6. Nasutidania orientalis sp. nov., female: A—dorsum of the body, B—venter of the body. Legs omitted.

FIGURE 7. Nasutidania orientalis sp. nov., female: A—gnathosoma in dorsal view, B—gnathosoma in ventral view.

FIGURE 8. Nasutidania orientalis sp. nov., female: A—right leg I in dorsal view, B—pretarsus and tarsal claw I in lateral view, C—right leg II in dorsal view.

FIGURE 9. Nasutidania orientalis sp. nov., female: A—right leg III in dorsal view, B—right leg IV in dorsal view.

FIGURE 10. DIC micrographs of Nasutidania orientalis sp. nov., female: A—general view dorsally, B—general view ventrally, C—prosoma in dorsal view, D—prosoma in ventral view, E—metapodosoma in dorsal view, F—metapodosoma in ventral view, G—opisthosoma in dorsal view, H—opisthosoma in ventral view, I—genital sclerites.