Pavania neotropica, Khaustov & Frolov, 2017

Khaustov, Alexander A. & Frolov, Andrey V., 2017, New species of heterostigmatic mites (Acari: Heterostigmata: Athyreacaridae, Dolichocybidae, Pygmephoridae) associated with scarab beetles (Coleoptera: Geotrupidae, Scarabaeidae) from Brazil, Zootaxa 4294 (5), pp. 501-521 : 508-511

Pavania neotropica sp. nov.

( Figures 7–10 )

Description. Female ( Figures 7–10 ). Body weakly sclerotized. Length of idiosoma 120 (115–125), width 75 (70– 80). Gnathosoma ( Figure 7 ). Gnathosomal capsule, excluding palps, almost round, its length 26 (26–28), width 26 (26–31). Dorsally with two pairs of blunt-ended cheliceral setae (cha, chb). Setae cha 15 (15–16) barbed, distinctly longer than smooth chb 6 (6). Dorsal median apodeme well developed. Postpalpal setae (pp) rod-like, situated posterolaterally to setae cha. Venter of gnathosoma with one pair of smooth, pointed subcapitular setae m 10 (10– 11). Palps freely articulated to gnathosomal capsule, with smooth setae dFe and dGe dorsolaterally, setae dGe pointed, more than three times longer than blunt-ended dFe. Palps ventrally with two subequal solenidia. Palps terminated with well-developed tibial claw. Cheliceral stylets strong, curved. Pharynx thin-walled, with divided into four weak lateral projections situated close to each other inside gnathosomal capsule.

Idiosomal dorsum ( Figures 7 A, 10A, C). All dorsal shields with sparsely distributed dimples ( Figures 7 A, 10C). Prodorsal shield with three pairs of setae (v 1, v 2, sc 2); setae sc 1 completely absent ( Figure 10 C). Setae sc 2 pointed; other dorsal setae blunt-ended. Setae v 2, e, h 1 and h 2 smooth, other dorsal setae weakly barbed. Cupules ia on tergite D, im on tergite EF and ih on tergite H small, round. Posterior margin of tergite D with several very weak projections. Lengths of dorsal setae: v 1 17 (17–18), v 2 3 (3), sc 2 44 (41–44), c 1 20 (20–21), c 2 20 (19–20), d 16 (16– 17), e 8 (8–9), f 18 (18–19), h 1 7 (7–8), h 2 60 (59–61). Distances between setae: v 1 –v 1 25 (24–25), v 2 –v 2 34 (34–35), sc 2 –sc 2 37 (36–37), c 1– c 1 24 (22–24), d–d 53 (53–54), e–e 43 (43–44), f–f 33 (32–33), h 1– h 1 11 (11–12), h 1– h 2 7 (7).

Idiosomal venter ( Figures 7 B, 10B, D). All ventral plates with sparsely distributed dimples. All ventral setae smooth, needle-like. Ap1 and ap2 well developed and joined with appr, apsej well developed only in lateral parts; ap3 and ap4 well developed. Poststernal apodeme absent. Coxal fields I and II each with two pairs of setae (1 c and 2 c absent) ( Figure 10 D). Coxal fields III and IV each with three pairs of setae. Lengths of ventral setae: 1 a 7 (7–8), 1 b 6 (6), 2 a 11 (11–12), 2 b 4 (4–5), 3 a 9 (8–9), 3 b 8 (8–9), 3 c 8 (8–9), 4 a 9 (8–9), 4 b 8 (8–9), 4 c 8 (8–9), ag 5 (5– 7), g 1 2 (2–3), g 2 3 (3), ps 3 (3).

Legs ( Figures 8 , 9 ). All legs subequal in length. Leg I ( Figure 8 A). Setal formula: 0–4–1–6(2) –11(2). Tarsus with two small claws and semioval empodium. Setae (u) and (pv) with widened and flattened tips. Setae d of femur weakly barbed; other leg setae smooth. Setae l’ of femur, l’ of genu, k, v’, l” of tibia blunt-ended; other leg setae (except eupathidia) pointed. Trochanter dorsolaterally with short projection. Tarsus I with ventrodistal membranous flange. Lengths of solenidia ω 1 6 (6)> ω 2 4 (4–5) <φ 1 6 (6)> φ 2 4 (4); Solenidion φ 2 baculiform, other solenidia clavate. Leg II ( Figure 8 B). Setal formula: 0–2–1–4(1)–6(1). Tarsal claws simple, hooked; empodium large. Solenidion ω 4 (4–5), clavate, solenidion φ 4 (4) baculiform. Trochanter dorsolaterally with short projection. Setae tc”, u’ and (pv) slightly widened and flattened distally. Setae l’ of tibia and tc’ of tarsus slightly thickened. Seta v” of femur blunt-ended; other setae pointed. Setae v” of femur, d, l’ of tibia, tc’ and pl” of tarsus weakly barbed; other leg setae smooth. Leg III ( Figure 9 A). Setal formula: 0–1–1–4–5. Claws and empodium of same shape as on tarsus II. Setae d of femur, l” of genu and all tarsal setae blunt-ended; other leg setae pointed. Setae l’ and v” of tibia weakly barbed; other leg setae smooth. Leg IV ( Figure 9 B). Setal formula: 0–1–1–4–5. Claws and empodium of same shape as on tarsus III. Setae d of femur and all tarsal setae blunt-ended; other leg setae pointed. Seta v” of tibia weakly barbed; other leg setae smooth.

Male unknown.

Type material. Female holotype, slide No. 10721, Brazil, Mato Grosso, Cuiabá municipality, October 2016, A. Frolov leg., on Canthon histrio . The mites were attached to the membrane connecting pro- and mesothorax of the beetles; paratypes: 11 females, same data.

Type deposition. The holotype and three paratypes are deposited in the collection of UNESP—Universidade Estadual Paulista , Department of Zoology and Botany, 15054–000 São José do Rio Preto –SP, Brazil ; five paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen, Russia ; two paratypes are deposited in the collection of the Zoological Institute of RAS, Saint Petersburg, Russia .

Differential diagnosis. The new species considerably differs from all known species of the genus by the absence of setae 1 c and 2 c on coxal fields I and II (vs. present in other species). The female of the new species is most similar to P. sabzevarensis Hajiqanbar and Khaustov, 2010 , described from Iran ( Hajiqanbar & Khaustov 2010), by the absence of setae sc 1 and the same leg setation. In addition to the absence of setae 1 c and 2 c, the new species differs from P. sabzevarensis by its blunt-ended dorsal idiosomal setae c 1 and d (vs. pointed in P. sabzevarensis ).

Etymology. The name of the new species referring to its distribution in Neotropical region.

Figures

FIGURE 7. Pavania neotropica sp. nov., female: A—dorsum of the body, B—venter of the body.

FIGURE 8. Pavania neotropica sp. nov., female: A—left leg I in dorsal view, B—left leg II in dorsal view.

FIGURE 9. Pavania neotropica sp. nov., female: A—left leg III in dorsal view, B—left leg IV in dorsal view.

FIGURE 10. DIC micrographs of Pavania neotropica sp. nov., female: A—general view dorsally, B—general view ventrally, C—gnathosoma and podosoma in dorsal view, D—gnathosoma and podosoma in ventral view.