Stenohya dongtianensis, Li & Shi, 2023

Li, Yun-Chun & Shi, Ai-Min, 2023, Two new species of the pseudoscorpion genus Stenohya (Pseudoscorpiones Neobisiidae) from Guangxi Zhuang Autonomous Region, China, Zootaxa 5278 (2), pp. 387-395 : 388-390

Stenohya dongtianensis sp. nov.

( Figures 1 , 3A )

Type material. Holotype male: China, Guangxi Province, Guilin City, Xingan County, Hucheng Town , Dongtian Village , Longpan Mountain , Rudongyan , 25º34’26.3’’N, 110º37’12.2’’E, 200 m a.s.l., 21 February 2019, Yun-Chun Li leg., in MCWNU ( Ar-Ps-GX-0009 ) ; Paratype: 1 male, collected with the holotype, in MCWNU ( Ar-Ps-GX-0007 ).

Diagnosis (male, female unknown). This new species is distinguished from other members of the genus Stenohya by the following combination of characters: pedipalpal femur with one distal tubercle on the prolateral face, hand with 14 large tooth-shaped tubercles in the middle (retrolateral view). Fixed finger with 112–115 small cusped teeth, movable finger with 106–110 teeth. Pedipalpal femur 5.21–5.26× longer than broad, length 1.96–1.97 mm; chela with pedicel 4.56–4.60× longer than broad, length 3.62–3.63 mm; ratio movable chelal finger/chelal hand (with pedicel) 1.46–1.48×.

Etymology. Latinised adjective, derived from Dongtian Village, near the type locality.

Description. Carapace, chelicerae and abdomen brown, remaining parts yellowish brown.

Carapace ( Fig. 1A ): 1.06–1.08× longer than broad, with four well-developed eyes; two anterior eyes, length 0.12–0.13 mm, breadth 0.07–0.08 mm; two posterior eyes length 0.09–0.10 mm, breadth 0.05–0.06 mm; anterior margin with distinct epistome, triangular. Carapace surface with seven lyrifissures. With a total of 29 or 30 setae, including six on the anterior margin and seven or eight on the posterior margin.

Chelicera: Hand with six or seven setae and two lyrifissures dorsally, movable finger with one submedial seta; fixed cheliceral finger with 13 teeth, movable finger with seven teeth ( Fig. 1B ). Galea divided into two main branches, one of them forked apically ( Figs 1B, C ). Serrula exterior with about 39 blades and serrula interior with 33; rallum composed of six blades ( Fig. 1D ).

Pedipalp ( Fig. 1I–M ): pedipalpal femur with one distal tubercle on the prolateral face, and with seven lyrifissures, patella with eight lyrifissures, hand with 14 large tooth-shaped tubercles in the middle (retrolateral view), each tooth-shaped tubercle has a seta at the base ( Fig. 1I, J ). Trochanter 2.21–2.23×, femur 5.21–5.26×, patella 4.19–4.24× longer than broad, femur 1.13–1.14× longer than patella. Chela (with pedicel) 4.56–4.60×, hand (with pedicel) 1.92–1.95× longer than broad; movable chelal finger 1.46–1.48× longer than hand (with pedicel) length. Fixed finger with 112–115 small cusped teeth, movable finger with 106–110 teeth; venom duct in fixed finger, very short. Fixed chelal finger with eight trichobothria and movable finger with four trichobothria, eb, esb, ib and isb located basally of the fixed finger; et, est, it (retrolateral view) and ist (prolateral view) situated distally, et distinctly closer to fingertip than to it; on movable finger, b and sb located basally, t and st situated distally.

Abdomen: tergal chaetotaxy (I–XI): 6: 8: 8: 8: 8: 9: 11: 12: 12: 10: 7; sternal chaetotaxy (IV–XI): 27: 15: 13: 14: 16: 17: 11: 7; anal cone with two dorsal and two ventral setae. Tergite XI with two tactile setae. Manducatory process with five setae. Pedipalpal coxa with 12 setae, coxa I 9, II 8, III 9, IV18 setae. Anterior genital operculum with 40–42 setae and two lyrifissures; posterior operculum with 27–29 setae, two lyrifissures ( Fig. 1H ). Sternites VI 12–13, VII 13, VIII 13 medial scattered glandular setae ( Fig. 1E ).

Legs ( Fig. 1F, G ): Leg I: trochanter 0.91–0.93× longer than deep, femur 4.42–4.43× longer than deep and 1.40–1.42× longer than patella, patella 2.76–2.77× longer than deep, tibia 4.29–4.30× longer, basitarsus 3.23–3.24× longer, telotarsus 4.43–4.45× longer than deep, telotarsus 1.29–1.30× longer than basitarsus. Leg IV: trochanter 2.89–2.93× longer than deep, femur+patella 3.62–3.65× longer than deep, femur shorter than patella, tibia 5.78– 5.79× longer than deep, basitarsus 4.14–4.16× longer, telotarsus 6.37–6.38× longer than deep. Basitarsus with one tactile seta (distally, TS = 0.53), telotarsus with a tactile seta near the middle (TS = 0.46), subterminal seta forked, arolia shorter than claws.

Dimensions (Length/width or, in the case of the legs, length/depth in mm).

Males: body length 3.83–3.92. Carapace 1.35–1.37/1.28–1.29. Pedipalp: trochanter 1.00–1.02/0.45–0.47, femur 1.96–1.97/0.38–0.40, patella 1.73–1.76/0.41–0.42, hand (with pedicel) 1.53–1.55/0.79–0.80, length of movable chelal finger 2.23–2.24, chela 3.62–3.63/0.79–0.80. Leg I: trochanter 0.35–0.39/0.39–0.40, femur 1.22–1.24/0.28– 0.31, patella 0.88–0.91/0.32–0.33, tibia 0.86–0.88/0.20–0.23, basitarsus 0.49–0.51/0.15–0.17, telotarsus 0.63– 0.66/0.14–0.16. Leg IV: trochanter 0.79–0.81/0.27–0.30, femur+patella 1.69–1.72/0.47–0.50, tibia 1.64–1.66/0.28– 0.30, basitarsus 0.69–0.71/0.17–0.19, telotarsus 0.91–0.93/0.14–0.16.

Distribution. China (Guangxi).

Figures

FIGURE 1. Stenohya dongtianensis sp. nov., holotype male (A–M). A carapace; B right chelicera; C left galea; D rallum of right chelicera; E sternites V–VIII with medial discal setae; F right leg I, lateral view; G right leg IV, lateral view; H male genital area; I palp (minus chela); J pedipalp hand, retrolateral view; K chela, retrolateral view; L chela, dorsal view; M chela, prolateral view. Scale bars: 0.20 mm.

FIGURE 3. A Stenohya dongtianensis sp. nov., dorsal view, holotype male B Stenohya jiahensis n. sp., dorsal view, holotype male. Scale bar: 1.00 mm.