A new species, new genus and new records of heterostigmatic mites (Acari: Heterostigmata) phoretic on scarab beetles of the subfamily Orphninae (Coleoptera: Scarabaeidae) Author Khaustov, Alexander A. Author Frolov, Andrey V. text Zootaxa 2018 2018-11-07 4514 2 181 201 journal article 28019 10.11646/zootaxa.4514.2.3 7e11cb7b-ab7c-4a1d-9e86-e00521d205b9 1175-5326 2607894 06EF10B9-0C0A-4850-8CF6-2F69B07BB642 Pseudopygmephorus peritrematus ( Mahunka, 1979 ) ( Figs 11–15 ) Bakerdania peritremata Mahunka, 1979 , p. 147 , Figs 14 A-G. Pseudopygmephorus peritrematus : Khaustov 2010 , p. 262 . Redescription . FEMALE ( Figs 11–15 ). Length of idiosoma 180–205, width 115–125. Gnathosoma ( Fig. 12 ). Gnathosomal capsule almost round in outline, length 22, width 21. Dorsum with two pairs of cheliceral setae cha 8 and chb 16. Setae chb weakly barbed, other gnathosomal setae smooth. Setae cha , dFe and pp blunt-ended, other gnathosomal setae pointed. Dorsal median apodeme present, weakly developed. Postpalpal setae ( pp ) situated anterolaterally to setae cha . Ventral gnathosoma with one pair of setae m 7 and round pits situated posteriorly to m . Palpi with setae dFe and dGe dorsolaterally; setae dGe distinctly longer than dFe . Palpi ventrally each with mushroom-like ass and small solenidion laterally to ass . Palpi terminated with small tibial claw and tiny eupathidium-like seta; palpal tibiotarsus usually completely covered by anterior part of femorogenu. Pharyngeal pumps separated, transversely striated; pharyngeal pump 1 small, butterfly-like, situated inside gnathosoma; pharyngeal pumps 2 and 3 oval, pump 3 slightly larger than pump 2. FIGURE 9 . Troxodania problematica (Mahunka, 1975) comb. nov. , female: A—left leg III in dorsal view, B—left leg IV in dorsal view. Idiosomal dorsum ( Figs 11A , 15A ). Only posterior part of prodorsum covered by anterior part of tergite C. All dorsal shields with numerous tiny, barely discernable dimples ( Fig. 15A ). Prodorsal shield with two pair of setae ( v 2 , sc 2 ), one pair of weakly barbed capitate trichobothria and one pair of elongate and constricted in central part stigmata ( Fig. 15A ); trichobothria with delicate longitudinal striation in distal half. Stigmata associated with well developed tracheal trunks. Setae v 2 smooth, other dorsal setae barbed. Setae v 2 needle-like and stiff, setae sc 2 , c 2 e and h 1 pointed, other dorsal setae blunt-ended. Cupules ia on tergite D and ih on tergite H small, round. Posterior margin of tergite H with short tongue-like median projection. Lengths of dorsal setae: v 2 11–14 , sc 2 41–45, c 1 26– 28 , c 2 45–48, d 30–34, e 27–33, f 39–44, h 1 40–46, h 2 23–24. Distances between setae: v 2 –v 2 28–30 , sc 2 –sc 2 24–26 , c 1 – c 1 37–40, c 1 – c 2 22–25 , d–d 42–46, e–f 9–12, f–f 40–42, h 1 – h 1 23–26 , h 1 – h 2 15–17. FIGURE 10 . DIC micrographs of Troxodania problematica (Mahunka, 1975) comb. nov. , female: A—prodorsum, Banterior part of posterior sternal plate, C—claw on tibiotarsus I. Idiosomal venter ( Figs 11B , 15B, C ). All ventral plates with numerous tiny dimples ( Fig. 15B ). Setae ps 3 bluntended, other ventral setae pointed. Setae 1 b thickened and flattened. Setae 3 a , 3 c , 4 a , 4 c smooth, other ventral setae barbed. Ap1, ap2 and apsej well developed and joined with appr; ap3 indistinct; ap4 well developed, reaching to bases of setae 3 b . Apodemes 5 absent. Ags bell-like, pgs large, elongate-triangular, mgs small, oval. Posterior margin of posterior sternal plate tripartite. Posterior margin of aggenital plate rounded. Setae ps 2 absent ( Fig. 15C ). Lengths of ventral setae: 1 a 21–24, 1 b 21–22, 2 a 27–32, 2 b 25–27, 3 a 24–25, 3 b 23–26, 3 c 18–21, 4 a 23–27, 4 b 31–36, 4 c 24–28, ps 1 20–21 , ps 3 15–16. Legs ( Figs 13 , 14 ). Leg I ( Fig. 13A ) distinctly thicker than leg II. Setal formula: 1–3–4–16 (4). Tibiotarsus enlarged, with massive blunt-ended claw. Setae tc’ and tc” situated on short and wide pinnaculum. Solenidion ω 1 completely fused with tibiotarsus forming sensory pit, other solenidia weakly clavate. Lengths of solenidia ω 1 10– 11 , ω 2 5–6, φ 1 9, φ 2 5–6. Seta d of femur hook-like; seta pl’ of tarsus smooth and attenuated, other setae (except eupathidia) pointed and barbed. Leg II ( Fig.13B ). Setal formula: 1–3–3–4(1)–6(1). Tarsus with thickened padded claws and flipper-like empodium. Solenidia ω 7 and φ 4 clavate. Seta tc” of tarsus smooth, other setae barbed; seta u’ of tarsus blunt-ended, other setae pointed. Leg III ( Fig. 14A ). Femur divided into basi- and telofemur. Setal formula: 1–2–2–4(1)–6. Claws and empodium of same shape as on tarsus II. Solenidia φ 4 weakly clavate Seta tc” of tarsus smooth, other setae barbed; setae d of femur and u’ of tarsus blunt-ended, other setae pointed. Leg IV ( Fig 14B ). Femur divided into basi- and telofemur. Setal formula: 1–2–1–4(1)–6. Claws simple, hooked, empodium slightly smaller than on tarsi II and III. Solenidion φ 4 weakly clavate. All setae barbed. Setae d of femur and v” of tibia blunt-ended, other setae pointed. MALE and LARVA unknown. Material examined . BURKINA FASO : 11 females on Orphnus macleayi Laporte de Castelnau and 1 female on Orphnus subfoveatus Fairmaire, Ouagadougou , 6.VI.1927 , G. Olsoufieff leg. Remarks . Pseudopygmephorus peritrematus ( Mahunka, 1979 ) was described from South Africa ( Mahunka 1979 ). Examined specimens from Burkina Faso matched the original description of P. peritrematus and are undoubtedly conspecific with it.