Spatulaphorus enoplotruporum

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: 278-281

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Spatulaphorus enoplotruporum

sp. nov.

Spatulaphorus enoplotruporum  sp. nov.

( Figs 1–5View FIGURE 1View FIGURE 2View FIGURE 3View FIGURE 4View FIGURE 5)

Description. FEMALE ( Figs 1–5View FIGURE 1View FIGURE 2View FIGURE 3View FIGURE 4View FIGURE 5). Body well sclerotized. Length of idiosoma 205 (175–240), width 120 (100–140). Gnathosoma ( Fig. 2 View Figure ). Gnathosomal capsule, excluding palps, subrectangular, length 22 (19–24), width 22 (19–24). Dorsum with one pair of needle-like cheliceral setae (сha) 7 (5–7). Dorsal median apodeme absent. Postpalpal setae (pp) spine-like, situated laterally to setae сha. Ventral gnathosoma with one pair of smooth, pointed subcapitular setae m 6 (5–7) and round pits situated posteriad to m. Palps with smooth setae dFe and dGe dorsolaterally, setae dGe pointed, about twice longer than needle-like dFe. Palps ventrally each with mushroomlike accessory setigenous structure (ass) and tiny solenidion. Palps terminated with small tibial claw and tiny eupathidium-like seta. Pharyngeal pump 2 with weak transverse striation; pharyngeal pump 1 small, butterfly-like; pharyngeal pump 3 oval, slightly smaller than oval pump 2 ( Fig. 2C View Figure ).

Idiosomal dorsum ( Figs 1A View Figure , 5A, C, E, G View Figure ). All dorsal shields with numerous tiny, barely discernable dimples ( Figs 5A, C, E, G View Figure ). Prodorsal shield with three pairs of setae (v 1, v 2, sс 2), one pair of weakly barbed capitate trichobothria and one pair of round stigmata ( Fig. 5 C View Figure ). Stigmata associated with well developed tracheal trunks. All dorsal idiosomal setae blunt-ended and barbed. Cupules ia on tergite D, im on tergite EF and ih on tergite H large, round. Tergites D, EF and H each with one pair of oval porous areas. Lengths of dorsal setae: v 1 23 (21–23), v 2 13 (10–13), sс 2 49 (45–54), с 1 37 (30–38), с 2 49 (44–54), d 42 (39–48), e 25 (23–31), f 54 (44–58), h 1 51 (45–57), h 2 16 (16–21). Distances between setae: v 1– v 1 22 (20–23), v 2 –v 2 39 (34–42), sс 2 –sс 2 47 (39–49), с 1– с 1 46 (39–47), с 1– с 2 27 (23–29), d–d 68 (55–74), e–f 17 (14–17), f–f 40 (31–46), h 1– h 1 26 (22–32), h 1– h 2 18 (14–20).

Idiosomal venter ( Figs 1B View Figure , 5B, D, F, H, I View Figure ). All ventral plates with numerous tiny dimples. Setae 1 b and 2 с pointed; other ventral setae with slightly rounded tips. Setae 1 b and ps 3 with a few barbs; setae ps 1, 2 strongly barbed; other ventral setae smooth. Bases of setae ps 3 situated distinctly anteriad bases of setae ps 1-2. Apodemes 1 (ap1) and apodemes 2 (ap2) well developed and joined with thick prosternal apodeme (appr); sejugal apodeme (apsej) developed only laterally; apodemes 3 (ap3) weak, not reaching to poststernal apodeme (appo); apodemes 4 (ap4) well developed, exceeding beyond bases of setae 3 b. Apodemes 5 (ap5) well developed, joined with appo and reaching beyond setae 4 a. Anterior genital sclerite (ags) small, cup-like; posterior genital sclerite (pgs) small, oval, with lateral processes ( Figure 5I View Figure ). Posterior margins of posterior sternal plate weakly concave in middle part. Posterior margin of aggenital plate rounded. Lengths of ventral setae: 1 a 9 (9–10), 1 b 17 (15–21), 1 с 11 (10–12), 2 a 10 (10–11), 2 с 23 (18–23), 3 a 14 (12–16), 3 b 10 (9–11), 3 с 12 (11–14), 4 a 11 (10–13), 4 b 15 (14–17), 4 с 12 (12–14), ps 1 22 (21–25), ps 2 23 (21–25), ps 3 18 (17–20).

Legs ( Figs 3 View Figure , 4 View Figure ). Leg I ( Fig. 3A View Figure ) slightly thicker than leg II. Setal formula: 1–4–2–17 (4). Tibiotarsus enlarged, with large claw. Setae (u) consolidated into a horn-like structure opposing to claw. Tarsal claw blunt-tipped. Seta s distinctly foliate distally; seta pv” slightly foliate distally. Seta d of femur spatulate, with short subterminal projection. Setae l’ of femur pl’ and k of tibiotarsus smooth; other leg setae (except eupathidia) sparsely barbed. Setae l’ of femur, (l) of genu and k of tibiotarsus blunt-ended; other leg setae (except eupathidia) pointed. Lengths of solenidia ω 1 8 (7–9), ω 2 6 (5–7), φ 1 8 (8–9), φ 2 6 (5–6); Solenidion φ 1 thick, clavate, other solenidia weakly clavate. Leg II ( Fig. 3B View Figure ). Setal formula: 1–3–1–4–6(1). Tarsus with padded claws and empodium with three lobes, one distal and two lateral. Solenidion ω 6 (5–7), weakly clavate, solenidion φ absent. Setae (pv) of tarsus distinctly foliate distally; setae d and l’ of femur blunt-ended; other leg setae pointed. Seta u’ of tarsus smooth and thin; other leg setae barbed. Leg III ( Fig. 4A View Figure ). Femur divided into basi- and telofemur. Setal formula: 1–2–1–4–6. Claws and empodium of same shape as on tarsus II. Setae (pv) of tarsus distinctly foliate distally; setae v’ of trochanter, d, v’ of femur and l‘ of genu blunt-ended; other leg setae pointed. Seta u’ of tarsus smooth; other leg setae barbed. Leg IV ( Fig 4B View Figure ). Femur divided into basi- and telofemur. Setal formula: 1–2–0–4–6. Claws simple, empodium round, stalked. Setae tс”, u’, and (pv) slightly foliate distally (flattened tips difficult to discern in some specimens); setae l’, v’ of tibia and t с’ of tarsus pointed; other leg setae blunt-ended. Seta pl” of tarsus smooth, spiniform; other leg setae barbed.

MALE unknown.

Type material. Female holotype, slide ZISPAbout ZISP T-Pygm-001, Thailand, Chiang Mai, X.1986  ; paratypes: 19 females, same data  , 4 females, Thailand, Chiang Mai, Mae Ai , VII.1992, N.Kagana. 

Type deposition. The holotype and four paratypes are deposited in the collection of Zoological Institute of RASAbout RAS, Saint Petersburg, Russia  ; 19 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 S. сamerikae Dastych and Rack, 1993, described from Botswana ( Dastych & Rack 1993), by the similar modifications of setae on tibiotarsus I and tarsus II, presence of apodemes 5, and characteristic position of setae ps 3 anteriorly to ps 1, 2. The new species differs from S. сamerikae by distinctly barbed setae ps 1, 2 (vs. smooth in S. сamerikae), foliate setae on tarsi III and IV (vs. nonmodified in S. сamerikae) and by distinctly longer dorsal setae d 39–48, f 44–58, h 1 45–57 (vs. d 25–30, f 24–31, h 1 24–31 in S. сamerikae). The new species also similar to S. langi Dastych and Rack, 1993  , described from Vietnam ( Dastych & Rack 1993), by the similar relative lengths of dorsal idiosomal setae and by the same number of modified foliate setae on tibiotarsus I and tarsi I and II. The new species differs from S. langi  by non-modified setae tс’ on tarsi II and III (vs. spiniform in S. langi  ), by setae ps 1, 2 distinctly barbed and subequal to ps 3 (vs. ps 1, 2 smooth and distinctly shorter than ps 3 in S. langi  ), and by setae 2 a distinctly shorter than 2 с (vs. 2 a distinctly longer than 2 с in S. langi  ).

Etymology. The name of the new species refers to its association with beetles of the genus Enoplotrupes  .


Zoological Institute, Russian Academy of Sciences


Union of Burma Applied Research Institute