Scutacarus crinitus Khaustov, 2015, sp. nov.
Creators: name: Khaustov, Alexander A.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Scutacaridae
Scutacarus
Scutacarus crinitus

description: Scutacarus crinitus sp. nov.
(Figs. 9–11, 12 C, 13A)
Description. FEMALE (holotype). Length of idiosoma 195 (185–195 in 7 paratypes), width 190 (185–190). Gnathosoma (Fig. 5): similar to that of S. myrmicinus sp. nov., but minute postpalpal setae present anterolaterally to setae cha. Setae cha and chb sparsely barbed. Rough microsculpture present only on lateral surfaces of gnathosoma and not reaching to bases of setae m. Idiosomal dorsum (Fig. 9 A). Prodorsum as in S. lasiophilus sp. nov. All dorsal shields with numerous small dimples. Setae e and h 2 vestigial. Setae c 1, c 2 and d heavily barbed and slightly thickened distally (Fig. 13 A). Setae f and h 1 short, blunt-ended and weakly barbed. Cupules ia on tergite D and ih on tergite H large, round. Tergite EF with 1 pair of oval porous fields situated anteromedially to setae f. Small pore-like structures situated posteromedially to setae c 1 on tergite C and medially to d on tergite D. Lengths of dorsal setae: c 1 30 (29 – 32), c 2 28 (28 – 29), d 31 (33–36), f 9 (9–10), h 1 9 (9–10). Distances between setae: c 1– c 1 53 (53–55), d–d 91 (91–93), f–f 89 (88–93), h 1– h 1 46 (43–46). Idiosomal venter (Fig. 9 B). All ventral plates with numerous small dimples. Apodemes as in S. myrmicinus sp. nov. Setae 2 b slightly thickened, smooth, blunt-ended, setae 4 a smooth, situated on the same level as 4 b and not reaching beyond posterior margin of poststernal plate, setae ps 3 short and smooth. Other ventral setae distinctly barbed. Secondary transverse sclerotized line on poststernal plate present. Anterior genital sclerite complicate, similar to that of S. lasiophilus sp. nov. (Fig. 12 C), posterior genital sclerite large, triangular. Lengths of ventral setae: 1 a 29 (28–39), 1 b 25 (23–26), 2 a 25 (23–26), 2 b 20 (19–21), 3 a 27 (25–28), 3 b 35 (30–35), 3 c 32 (29–33), 4 a 14 (13–14), 4 b 32 (21–34), 4 c 33 (32–35), ps 1 17 (16– 18), ps 2 17 (16–18), ps 3 5 (4–5). Legs (Figs. 10, 11). Leg I (Fig. 10 A) as in S. myrmicinus sp. nov. Lengths of solenidia: ω 1 9 (8–9)> ω 2 6 (6–7) = φ 1 6 (6–7) = φ 2 6 (6–7); ω 2 and φ 2 baculiform, φ 1 clavate, ω 1 finger-shaped. Leg II (Fig. 10 B) as in S. lasiophilus sp. nov. Solenidion ω 7 (6–7) finger-shaped. Leg III as in S. lasiophilus sp. nov. Leg IV (Fig. 11) as in S. lasiophilus sp. nov. except seta tc” distinctly barbed and slightly longer than d of tibiotarsus.
MALE and LARVA unknown.
Type material. Female holotype, slide AK 170914 and 9 female paratypes, RUSSIA: Tyumen Province, vicinity of Tyumen, 57°13'43.6" N, 65°28'28.4" E, on ants Lasius niger, 17 September 2014, coll. A.A. Khaustov.
Type deposition. Holotype and 7 paratypes deposited in TUMZ; 2 paratypes in ZISP.
Etymology. The name of a new species is derived from the Latin word crinitus meaning "fluffy" and referring to the heavily barbed setae on tergites C and D.
Differential diagnosis. Female of the new species is very similar to S. ellipticus Karafiat, 1959 by the presence of a secondary sclerotized line on the poststernal plate and similar relative lengths of dorsal idiosomal setae. It differs from S. ellipticus by heavily barbed and slightly thickened distally setae on tergites C and D (not so heavily barbed and not thickened in S. ellipticus as in Fig. 13 B) and by shorter setae f and h 1 9–10 long (vs. 15–16 in S. ellipticus).
description: Published as part of Khaustov, Alexander A., 2015, Three new species of myrmecophilous scutacarid mites (Acari: Scutacaridae) from Western Siberia, Russia, pp. 265-279 in Zootaxa 4013 (2) on pages 274-275, DOI: 10.11646/zootaxa.4013.2.7, http://zenodo.org/record/245159