Spatulaphorus brevisetosus, Khaustov & Frolov & Akhmetova, 2024

Spatulaphorus brevisetosus sp. nov.

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

Description. FEMALE. Body well sclerotized. Length of idiosoma 195 (175–255), width 105 (105–150).

Gnathosoma. Gnathosomal capsule, excluding palps, subrectangular, length 21 (21–23), width 21 (21–24). Dorsum with one pair of needle-like cheliceral setae ( cha) 5 (4–5). Dorsal median apodeme present, poorly developed. Postpalpal setae ( pp) 2 (2) needle-like, situated laterad setae cha. Ventral gnathosoma with one pair of smooth, weakly blunt-tipped subcapitular setae m 5 (5–6) and round pits n situated posteriad m. Palps with smooth and weakly blunt-tipped setae dFe 3 (2–3) and dGe 6 (6) dorsolaterally. Palps ventrally each with mushroom-like accessory setigenous structure ( ass) and tiny solenidion ω. Palps terminated with small blunt-tipped tibial claw and tiny eupathid-like seta. Pharyngeal pumps poorly visible.

Idiosomal dorsum ( Figs 1A View FIGURE 1 , 4A View FIGURE 4 ). All dorsal shields with big puncta. Prodorsal shield with three pairs of setae

( v1, v2, sc2), one pair of weakly barbed capitate trichobothria ( sc1) and one pair of round stigmata. Stigmata associated with well-developed tracheal trunks. All dorsal idiosomal setae blunt-tipped; setae v2, e and h2 with few minute barbs, other dorsal setae distinctly barbed. Alveoli of setae e and f clearly separated. Cupules ia on tergite D, im on tergite EF and ih on tergite H large, round, subequal. Lengths of dorsal setae: v1 20 (20–25), v2 11 (11–13), sc2 29 (29–38), c1 26 (26–33), c2 29 (29–32), d 28 (28–33), e 15 (15–19), f 28 (28–35), h1 31 (31–40), h2 11 (11–15). Distances between setae: v1–v1 20 (20–24), v2–v2 30 (30–35), sc2–sc2 32 (32–38), c1–c1 34 (34–42), c1–c2 19 (19–22), d–d 44 (44–54), e–f 7 (7–8), f–f 39 (39–47), h1–h1 32 (32–40), h1–h2 10 (10–11).

Idiosomal venter ( Figs 1B View FIGURE 1 , 4B View FIGURE 4 ). Coxisternal fields I–II and aggenital plate laterally with sparsely distributed big puncta. Setae 1b pointed and weakly barbed; other ventral setae smooth and blunt-tipped. Bases of setae ps3 situated distinctly anteriad bases of setae ps1-2. 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 poststernal apodeme (appo); apodemes 4 (ap4) well developed, exceeding beyond bases of setae 3b. Apodemes 5 (ap5) short, joined with appo and reaching bases of setae 4a. Anterior genital sclerite (ags) small, cup-like; posterior genital sclerite (pgs) small, oval. Posterior margin of posterior sternal plate weakly concave in middle part. Posterior margin of aggenital plate rounded. Lengths of ventral setae: 1a 9 (9–10), 1b 16 (16–18), 1с 9 (9–12), 2a 12 (12–13), 2с 9 (9–11), 3a 10 (10–13), 3b 9 (9–12), 3c 11 (11–14), 4a 9 (9–12), 4b 14 (14–19), 4c 10 (10–13), ps1 11 (11–13), ps2 12 (12–14), ps3 11 (11–12).

Legs ( Figs 2 View FIGURE 2 , 3 View FIGURE 3 ). Leg I ( Fig. 2A View FIGURE 2 ). Leg setation: Tr 1 (v’), Fe 4 ( d, l’, l”, v”), Ge 2 ( l’, l”), TiTa 17(4) ( p’ϛ, p”ϛ, tc’ϛ, tc”ϛ, ft’ϛ, ft”ϛ, k, pl’, pl”, pv’, pv”, s, d, l’, l”, v’, v”, ω1, ω2, φ1, φ2). Tibiotarsus enlarged, with large claw; tibiotarsus internally with oval strongly sclerotized structure near solenidion φ2. Setae ( u) consolidated into a horn-like structure opposing claw. Tarsal claw blunt-tipped. Seta d of femur spatulate, with short subterminal projection. Setae l’ of femur, k and pl’ of tibiotarsus smooth; other leg setae (except eupathidia p’, p”, tc’, tc”, ft’, ft”) sparsely barbed. Setae l’, l” of femur, l” of genu and k of tibiotarsus blunt-tipped; other leg setae (except eupathidia) pointed. Lengths of solenidia ω1 8 (8–9), ω2 4 (4–5), φ1 7 (7–8), φ2 4 (4–5); Solenidion φ1 thick, clavate, ω1 digitiform; other solenidia weakly clavate. Leg II ( Fig. 2B View FIGURE 2 ). Leg setation: Tr 1 ( v’), Fe 3 ( d, l’, v”), Ge 1 ( l’), Ti 4 ( d, l’, v’, v”), Ta 6(1) ( pl”, tc’, tc”, u’, pv’, pv”, ω). Tarsus with thickened basally claws and pad-like empodium. Solenidion ω 5 (5) weakly clavate, solenidion φ absent. Seta u ’ smooth, other setae barbed; setae tc’ and pl” of tarsus spiniform, blunt-tipped; setae d, l’, and v” of femur blunt-tipped; other leg setae pointed. Leg III ( Fig. 3A View FIGURE 3 ). Femur divided into basi- and telofemur. Leg setation: Tr 1 ( v’), Fe 2 ( d, v’), Ge 1 ( l’), Ti 4 ( d, l’, v’, v”), Ta 6 ( pl”, tc’, tc”, u’, pv’, pv”). Claws and empodium of same shape as on tarsus II. Setae v’ of trochanter and u’ of tarsus smooth, other setae barbed; seta pl” of tarsus spiniform; setae v’ of trochanter, d, v’ of femur, and l’ of genu blunt-tipped, other leg setae pointed; solenidion φ absent. Leg IV ( Fig 3B View FIGURE 3 ). Femur divided into basi- and telofemur. Leg setation: Tr 1 ( v’), Fe 2 ( d, v’), Ge 0, Ti 4 ( d, l’, v’, v”), Ta 6 ( pl”, tc’, tc”, u’, pv’, pv”). Claws simple, empodium as on tarsi II and III. Seta v’ of trochanter smooth, other setae barbed; setae v’ of trochanter, d, v’ of femur, v” of tibia and pl” of tarsus blunt-tipped, other leg setae pointed; solenidion φ absent.

MALE unknown.

Type material. Female holotype, slide ZISP T-Pygm-010, USA, Georgia, Blackbeard Island . 8-9.VII.1970 ( CEMT), on Phanaeus igneus MacLeay ; paratypes: 17 females, same data .

Type deposition. The holotype and four paratypes are deposited in the collection of Zoological Institute of RAS, Saint Petersburg, Russia ; other 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. mexicanus Trejo-Palacios, 2023 , described from Mexico ( Trejo-Palacios et al. 2023), in having spiniform setae pl”, tc’ on tarsus II and pl” on tarsus III. The new species differs from S. mexicanus in having setae e and f as well as h1 and h2 distinctly separated (vs. alveoli of setae e and f as well as h1 and h2 contiguous in S. mexicanus ) and in having smooth setae ps1-3 (vs. barbed in S. mexicanus ).

Etymology. The name of the new species is a combination of to Latin words: brevis meaning short, and seta meaning bristle, and refers to relatively short dorsal idiosomal setae.