Perscheloribates paratranslamellatus, Ermilov & Rybalov, 2014

Perscheloribates paratranslamellatus View in CoL sp. n.

Figs 1–2 View Fig View Fig

Etymology: From the Latin prefix para (near) referring to the the similarity between the new species and the species Perscheloribates translamellatus (Pérez-Íñigo & Baggio, 1991) .

Diagnosis: body size 481–531× 298–348; rostrum rounded; rudimentary translamellar line; prolamellar lines absent; prodorsal setae setiform, barbed; sensilli spindle-form, ciliate; exobothridial setae short; one pair of notogastral setae p 1 present; sacculi Sa, S1 with elongate openings, S2, S3 with rounded openings; ventral setae setiform, slightly barbed, and with little difference in length; leg claws serrate on dorsal side.

Description:

Measurements. Body (length × width): 481 × 298 ( holotype ♂); 481–531 × 298–348 ( paratypes: 1♂ 4♀).

Integument. Body brown and light brown. Dorsal and ventral surfaces of body smooth, lateral surfaces weakly microgranulate.

Prodorsum ( Figs 1A, 1B, 1D View Fig ; 2A, 2B View Fig ). Rostrum slightly protruding, rounded. Lamellae located dorsolaterally, as long as half of prodorsum (in lateral view), without cusps. Translamellar line ( tr) rudimental, at tips of lamellae. Prolamellar lines absent. Sublamellar lines distinct, long. Sublamellar porose areas ( Al) very small, rounded (2–4). Keel-shaped chitinised ridges ( kf) distinct. Rostral ( ro, 61–69), lamellar ( le, 90–102) and interlamellar ( in, 114–127) setae setiform, barbed. Sensilli ( ss, 110–118) spindle-form (with long stalk, elongated lanceolate head and well developed thin apex), with numerous cilia. Exobothridial setae ( ex, 4–6) short, thin, smooth.

Notogaster ( Figs 1A, 1C View Fig ).Anterior notogastral margin convex medially. Dorsophragmata ( D) of medium size, widely rounded. Nine pairs of notogastral setae represented by alveoli; only one pair of thin, smooth setae developed ( p 1, 8–10). Four pairs of sacculi present: Sa, S1 with elongate openings, S2, S3 with small, rounded openings. Circumgastric band of muscle sigillae distinct. Opisthonotal gland openings ( gla) and lyrifissures developed in typical arrangement for genus.

Anogenital region ( Figs 1B, 1C View Fig ). Three pairs of adanal ( ad 1 – ad 3, 16–20), one pair of aggenital ( ag, 16–20), two pairs of anal ( an 1, an 2, 12–16) and four pairs of genital ( g 1 – g 4, 16–20) setae setiform, slightly barbed. Lyrifissures iad in para-anal position, located nearly to anal aperture.

Epimeral and lateral podosomal regions ( Figs 1B, 1D View Fig ). Apodemes 1, 2, 3 and sejugal apodemes distinct. Epimeral setal formula: 3–1–3–3. Setae (16–24) setiform, thin, slightly barbed; medial setae little shorter than others. Pedotecta I (Pd I) large, concave; pedotecta II (Pd II) rounded anteriorly. Discidia ( dis) triangular, rounded. Circumpedal carina ( cp) distinct.

Gnathosoma ( Figs 2C–2E View Fig ). Subcapitulum longer than wide: 118–123×82. Subcapitular setae setiform, barbed; h (28–32) longer than a, m (both 20). Lateral lips with two pairs of setiform, barbed adoral setae ( or 1, or 2, 10–12). Palps (length 69–73) with setation 0–2–1–3–9(+ω). Solenidion coupled with eupathidium acm.All setae (except some on tarsi) weakly barbed. Chelicerae (length 118–123) with two setiform, barbed cheliceral setae; cha (36–41) longer than chb (24–28).

Legs ( Fig. 2F View Fig ). Claw of each leg with several minute barbs on dorsally side. Formulae of leg setation and solenidia: I (1–5–2–4–19) [1–2–2], II (1–5–2–4–15) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 2. Almost all setae (except p) barbed or with short cilia. Famulus ( e) short, straight, indistinctly dilated apically, blunted. Solenidia ω 1 on tarsi I, ω 1 and ω 2 on tarsi II, σ on genua III short, thickened, blunt-ended; other solenidia longer, thinner, setiform.

Holotype: ♂ ETHIOPIA: Et-12–10. Preserved in ethanol ( ZISP).

Paratypes: 1♂ 4♀ ETHIOPIA: Et-12–10. Preserved in ethanol ( 1♂ 2♀ SZMN; 2♀ PC) .

Distribution: At present, this species is only known from the type locality.

Remarks: In having one pair of notogastral setae p 1 (other setae represented by alveoli), spindle-form and ciliate sensilli, and rounded rostrum, P. paratranslamellatus sp. n. is similar to P. translamellatus from Peru (Pérez-Íñigo & Baggio 1991); however, it differs from the latter by larger body size (481–531 ×298–348 versus 324–360 ×196–216), a rudimental translamellar line running nearly to lamellae (translamella complete in P. translamellatus ), absence of prolamellar lines (present, not reaching insertions of rostral setae in P. translamellatus ), longer setae p 1 (minute in P. translamellatus ) and elongate openings of sacculi Sa, S1 (rounded in P. translamellatus ).

From the Ethiopian species, Perscheloribates minutus ( Pletzen 1965; Corpuz-Raros 1980) is the closest morphologically to P. paratranslamellatus sp. n.; however, it differs from P. minutus in that it has a larger body size (481–531 ×298–348 versus 343–394 × 216–303 in P. minutus ), absence of prolamellar lines (present in P. minutus ), and development of a single pair of notogastral setae p 1 (versus p 1 – p 3 developed in P. minutus ).