A new species, new genus and new records of heterostigmatic mites (Acari: Heterostigmata) phoretic on scarab beetles of the subfamily Orphninae (Coleoptera: Scarabaeidae) Khaustov, Alexander A. Frolov, Andrey V. Zootaxa 2018 2018-11-07 4514 2 181 201 Khaustov & Frolov, 2018 Khaustov & Frolov 2018 [151,705,325,351] Arachnida Pygmephoridae Premicrodispus GBIF Animalia Trombidiformes 2 183 Arthropoda subGenus sp. nov. Premicrodispus  ( Figs 1–5)  Description. FEMALE ( Figs 1–5). Length of idiosoma 135 (135–165), width 92 (88–98). Gnathosoma( Fig. 2). Gnathosomal capsule elongate, length 18 (19–20), width 12 (12–13). Dorsum with one pair of smooth and pointed cheliceral setae ( cha) 9 (9–11). Dorsal median apodeme present in posterior part. Postpalpal setae ( pp) stiff, setalike and weakly blunt-ended, situated anterolaterally to setae cha. Ventral gnathosoma with one pair of smooth, pointed subcapitular setae m(9). Palps with smooth, pointed and subequal setae dFe7 (7–8) and dGe8 (7–8) dorsolaterally. Palpi ventrally each with tube-like accessory setigenous structure ( ass). Palps terminated with small tibial claw and tiny eupathidium-like seta. Pharyngeal pumps grouped together. Pharyngeal pump 1 very small, with few transverse stria; pharyngeal pump 2 large, subrectangular, distinctly transversely striated; pharyngeal pump 3 oval, smooth, about two times shorter than pump 2.   FIGURE 1.  Premicrodispus( Premicrodispus) hajiqanbari  sp. nov., female: A—dorsum of the body, B—venter of the body. Legs omitted.   FIGURE 2.  Premicrodispus( Premicrodispus) hajiqanbari  sp. nov., female: A—gnathosoma in dorsal view, B—gnathosoma in ventral view.  Idiosomal dorsum( Figs 1A, 5A). Only posterior part of prodorsum covered by anterior part of tergite C. All dorsal shields with numerous tiny, barely discernable dimples ( Fig. 5A). Prodorsal shield with one pair of setae ( sc 2), one pair of weakly barbed capitate trichobothria and one pair of oval stigmata. Stigmata associated with well developed tracheal trunks. Setae c 1and h 2smooth, other setae weakly barbed, setae dsometimes with only one subapical barb. Setae dand fblunt-ended, other dorsal setae pointed. Cupules iaon tergite D not evident in all specimens, ihon tergite H large, rhombic. Posterior part of tergite C and central parts of tergites D and EF with few short sclerotized lines; bases of setae eassociated with linear, oblique sclerotized ridge. Lateral plates with well developed oblique sclerotized lines. Lengths of dorsal setae: sc 231 (31–33), c 130 (29–32), c 237 (39–40), d21 (19– 20), e26 (26), f23 (21–22), h 126 (26–28), h 216 (15–16). Distances between setae: sc 2 –sc 233 (33–35), c 1– c 131 (31–32), c 1– c 219 (20), d–d32 (31–32), e–f9 (9–10), f–f43 (43–44), h 1– h 118 (15–17), h 1– h 216 (18–20).  Idiosomal venter( Figs 1B, 5B, C). All ventral plates with numerous tiny dimples ( Fig. 5C). All ventral setae smooth and pointed. Setae 1 a, 3 b, 3 c, 4 band 4c distinctly thickened basally ( Figs 1B, 5B, C). Apodemes 1 (ap1) not visible, apodemes 2 (ap2) well developed and joined with prosternal apodeme (appr); sejugal apodeme (apsej) well developed, thick; apodemes 3 (ap3) very weak, linear, joined with poststernal apodeme (appo); apodemes 4 (ap4) well developed, exceeding beyond bases of setae 3 b. Apodemes 5 absent. Anterior genital sclerite (ags) small, cup-like; posterior genital sclerite (pgs) small, oval. Anterior margin of posterior sternal plate with large median lobe. Posterior margin of aggenital plate rounded. Setae 4 aand ps 2absent. Lengths of ventral setae: 1 a8 (12), 1 b16 (17–18), 2 a22 (21–23), 2 b29 (28–30), 3 a15 (16–17), 3 b11 (10–12), 3 c11 (10–11), 4 b15 (13–16), 4 c11 (9–14), ps 116 (15–16), ps 326 (27–28).   FIGURE 3.  Premicrodispus( Premicrodispus) hajiqanbari  sp. nov., female: A—left leg I in dorsal view, B—left leg II in dorsal view.   FIGURE 4.  Premicrodispus( Premicrodispus) hajiqanbari  sp. nov., female: A—left leg III in dorsal view, B—left leg IV in dorsal view.  Legs( Figs 3, 4). Leg I ( Fig. 3A). Setal formula: 1–3–4–15(3). Solenidion ω 2absent. All solenidia fingershaped. Lengths of solenidia ω 17 (7), φ 18 (8–9) and φ 26 (7). All setae (except eupathidia) pointed. Setae d, v”of femur, l’of genu and ( pv) of tibiotarsus weakly barbed, other setae smooth. Leg II ( Fig. 3B). Setal formula: 1–3–3– 4(1)–6(1). Tarsus with simple hooked claws and flipper-like empodium. Solenidia ω4 (4) and φ5 (5) weakly clavate. All setae pointed. Setae v’of trochanter, pl”and tc’of tarsus weakly barbed; other setae smooth. Leg III ( Fig. 4A). Femur divided into basi- and telofemur. Setal formula: 1–2–2–4(1)–6. Claws and empodium of same shape as on tarsus II. Solenidion φ3 (3) short, weakly clavate. All setae pointed. Setae v’, l’of genu and l’of tibia weakly barbed; other setae smooth. Leg IV ( Fig 4B). Femur divided into basi- and telofemur. Setal formula: 1–2– 1–4–6. Solenidion φabsent. Claws and empodium as on tarsus III, but smaller. All setae pointed. Setae dof femur, d, v’of tibia, and tc’of tarsus weakly barbed; other setae smooth. MALE and LARVA unknown.   Type material. Female  holotype, slide ZISPT-Mcd-001, on  Orphnus luminosusBenderitter, Central African Republic, Haute-Sangha [ Mambéré-Kadéï], P.A. Ferreireleg.;  paratypes: 3 females, same data.  Type deposition. The holotypeand one paratypeare deposited in the collection of Zoological Institute of RAS, Saint Petersburg, Russia; two paratypesare deposited in the collection of the Tyumen  State University Museum of Zoology, Tyumen, Russia.   Differential diagnosis. The new species is most similar to  P. akermanae(Sevastianov and Zahida Al Douri, 1988)by the presence of only three solenidia on tibiotarsus I. The new species differs from  P. akermanaeby the absence of setae ps 2(vs. present in  P. akermanae). The new species differs from all the described species of the genus  Premicrodispusby its modified, thickened basally setae 1 a, 3 b, 3 c, 4 b, and 4 c(vs. simple in other  Premicrodispusspecies).   Etymology. The new species is named after Iranian acarologist Hamidreza Hajiqanbar for his contribution to study of insect-associated heterostigmatic mites. 2028142431 ZISP P. A. Ferreire Central African Republic Mambere-Kadei 6 187 1 Mambere-Kadei holotype 2028142436 [853,1212,476,501] ZISP P. A. Ferreire Central African Republic Mambere-Kadei 6 187 3 3 Mambere-Kadei paratype 2028142434 Russia State University Museum of Zoology 6 187 1 Tyumen'