Three new species of myrmecophilous scutacarid mites (Acari: Scutacaridae) from Western Siberia, Russia Author Khaustov, Alexander A. text Zootaxa 2015 4013 2 265 279 journal article 10.11646/zootaxa.4013.2.7 5d5c8108-e13c-4907-aa81-2c419eb23e30 1175-5326 245159 78DDD4C3-A37A-45DA-B190-673224664C97 Scutacarus crinitus sp. nov. ( Figs. 9–11 , 12 C, 13A) FIGURE 9 . Scutacarus crinitus Khaustov sp. nov . , female: A—idiosomal dorsum, B—idiosomal venter. 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 . FIGURE 10 . Scutacarus crinitus Khaustov sp. nov . , female: A—leg I in dorsal view, B—leg II in dorsal view. 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 ).