Peloribates tatyanae Ermilov & Anichkin, 2014, sp. nov.

Peloribates tatyanae sp. nov.

(Figures 38–41)

With characters of the genus Peloribates Berlese, 1908 as summarized by Bayartogtokh (2010).

Diagnosis. Body size 547–597 × 365–431. Body surface of notogaster and ventral side microfoveolate and densely striate. Rostral setae setiform, ciliate. Lamellar and interlamellar setae flagellate, smooth. Bothridial setae clavate, with barbed head. Notogastral setae smooth: c 1, c 2, da, la, dm, dp of medium size, setiform; lm, lp, h 1– h 3, p 1 long, flagellate; p 2, p 3 short, thin. Setae lm located posteriorly to la. Epimeral setal formula: 3–1–3–2. Legs tridactylous; lateral claws with ventral tooth.

Description. Measurements. Body length 581 (holotype: female), 547–597 (three paratypes: one female and two males); body width 381 (holotype), 365–431 (three paratypes).

Integument. Body color brown. Prodorsum covered with granulate cerotegument; granules conical (length up to 2). Body surface of notogaster and ventral side microfoveolate (diameter of foveolae less than 1) and densely striate.

Prodorsum. Rostrum widely rounded. Lamellae about 1/2 of length of prodorsum. Rostral setae (94–104) setiform, ciliate unilaterally. Lamellar and interlamellar setae (both 215–233) flagellate, smooth. Bothridial setae (45–57) clavate, with head rounded distally, barbed. Exobothridial setae (20) thin, smooth. Tutoria long, with tooth distally, reaching insertion of rostral setae. Sublamellar lines short. Sublamellar porose areas oval (12 × 8).

Notogaster. Anterior notogastral margin well developed, weakly convex medially. Dorsophragmata of medium size, elongate. Fourteen pairs of smooth notogastral setae of different length and morphology: c 1, c 2, da, la, dm, dp of medium size (45–53), setiform; lm (215–233), lp, h 1– h 3, p 1 (262–365) long, flagellate; p 2, p 3 shortest, thin. Setae lm located posteriorly to la. Four pairs of sacculi (Sa, S1, S2, S3) oval. Opisthonotal gland openings and lyrifissures visible only under high magnification in dissected specimens.

Gnathosoma. Subcapitulum longer than wide (131–147 × 118–123). Subcapitular setae setiform; a (24–28) slightly barbed, m (32–36) barbed, h (24–28) smooth. Two pairs of adoral setae 14–16) setiform, barbed. Palps (86) with setation 0–2–1–3–9(+ω). Solenidion shorter than half of palptarsus length, straight, thickened, weakly dilated distally, attached to eupathidium. Chelicerae (147–168) with two ciliate setae; cha (41) longer than chb (32–36). Trägårdh’s organ distinct.

Epimeral and lateral podosomal regions. Apodemes (1, 2, sejugal, 3) well visible. Epimeral setal formula: 3–1–3–2. All setae (20–28) setiform, thin, smooth. Setae 3c inserted on pedotecta II; 4c inserted on discidia. Setae 4b and their alveoli absent. Discidia triangular, blunted. Circumpedal carinae distinct.

Anogenital region. Five pairs of genital (g 1, 16–20; g 2– g 5, 12–16), one pair of aggenital (20–28), two pairs of anal (20–28) and three pairs of adanal (20–28) setae setiform, smooth. Adanal setae ad 3 inserted anteriorly to lyrifissures iad.

Legs. Tridactylous; lateral claws with ventral tooth. Formulae of leg setation and solenidia: I (1–5–3–4–20) [1–2–2], II (1–5–3–4–15) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homologies of setae and solenidia indicated in Table 10.

Type material. Collection data for holotype (female): locality 1 (litter); collection data for three paratypes (female and two males): locality 1 (litter).

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; two paratypes are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; one paratype is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name is dedicated to mother of the first author, Tatyana L. Ermilova, for her constant assistance in scientific research.

Remarks. The genus Peloribates comprises 85 species having a cosmopolitan distribution (data summarized by Subías 2004, updated 2014).

In having the clavate bothridial setae and flagellate notogastral setae, Peloribates tatyanae sp. nov. is most similar to Peloribates fragilis Hammer, 1967 from New Zealand and Peloribates neonominatus Subías, 2004 (see Mahunka 1983) from Tanzania. However, it clearly differs from the both by the striate body surface (versus without stria in P. fragilis and P. neonominatus), notogastral setae c 1, c 2, da, la, dm, dp, p 2, p 3 of medium size or short (versus all very long, flagellate in P. fragilis and P. neonominatus). Also, in having the heterotrichy of notogastral setae (short or medium size, setiform and long, flagellate) and clavate bothridial setae, Peloribates tatyanae sp. nov. is similar to Topobates berndhauseri (Mahunka, 1978) from Mauritius. However, it clearly differs from the latter by the presence of five pairs of genital setae (versus four pairs in T. berndhauseri), absence of prolamellae (versus present in T. berndhauseri), striate body surface (versus without stria in T. berndhauseri), smooth, flagellate lamellar and interlamellar setae (versus barbed, setiform in T. berndhauseri) and short, setiform adanal setae ad 1 (versus long, flagellate in T. berndhauseri).