Premicrodispus (Premicrodispus) hajiqanbari Khaustov & Frolov 2018, sp. nov.
Creators: name: Khaustov, Alexander A.
name: Frolov, Andrey V.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Pygmephoridae
Premicrodispus

description: Premicrodispus (Premicrodispus) hajiqanbari sp. nov.
(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 dFe 7 (7–8) and dGe 8 (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.
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 1 and h 2 smooth, other setae weakly barbed, setae d sometimes with only one subapical barb. Setae d and f blunt-ended, other dorsal setae pointed. Cupules ia on tergite D not evident in all specimens, ih on 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 e associated with linear, oblique sclerotized ridge. Lateral plates with well developed oblique sclerotized lines. Lengths of dorsal setae: sc 2 31 (31–33), c 1 30 (29–32), c 2 37 (39–40), d 21 (19– 20), e 26 (26), f 23 (21–22), h 1 26 (26–28), h 2 16 (15–16). Distances between setae: sc 2 –sc 2 33 (33–35), c 1 – c 1 31 (31–32), c 1 – c 2 19 (20), d–d 32 (31–32), e–f 9 (9–10), f–f 43 (43–44), h 1 – h 1 18 (15–17), h 1 – h 2 16 (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 b and 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 a and ps 2 absent. Lengths of ventral setae: 1 a 8 (12), 1 b 16 (17–18), 2 a 22 (21–23), 2 b 29 (28–30), 3 a 15 (16–17), 3 b 11 (10–12), 3 c 11 (10–11), 4 b 15 (13–16), 4 c 11 (9–14), ps 1 16 (15–16), ps 3 26 (27–28).
Legs (Figs 3, 4). Leg I (Fig. 3A). Setal formula: 1–3–4–15 (3). Solenidion ω 2 absent. All solenidia fingershaped. Lengths of solenidia ω 1 7 (7), φ 1 8 (8–9) and φ 2 6 (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 ω 4 (4) and φ 5 (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 φ 3 (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 φ absent. Claws and empodium as on tarsus III, but smaller. All setae pointed. Setae d of femur, d, v’ of tibia, and tc’ of tarsus weakly barbed; other setae smooth.
MALE and LARVA unknown.
Type material. Female holotype, slide ZISP T-Mcd-001, on Orphnus luminosus Benderitter, Central African Republic, Haute-Sangha [Mambéré-Kadéï], P.A. Ferreire leg.; paratypes: 3 females, same data.
Type deposition. The holotype and one paratype are deposited in the collection of Zoological Institute of RAS, Saint Petersburg, Russia; two paratypes are 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. akermanae by the absence of setae ps 2 (vs. present in P. akermanae). The new species differs from all the described species of the genus Premicrodispus by its modified, thickened basally setae 1 a, 3 b, 3 c, 4 b, and 4 c (vs. simple in other Premicrodispus species).
Etymology. The new species is named after Iranian acarologist Hamidreza Hajiqanbar for his contribution to study of insect-associated heterostigmatic mites.
description: Published as part of Khaustov, Alexander A. & Frolov, Andrey V., 2018, A new species, new genus and new records of heterostigmatic mites (Acari: Heterostigmata) phoretic on scarab beetles of the subfamily Orphninae (Coleoptera: Scarabaeidae), pp. 181-201 in Zootaxa 4514 (2) on pages 183-187, DOI: 10.11646/zootaxa.4514.2.3, http://zenodo.org/record/2607894