Stenohya jiahensis, 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 : 390-392

Stenohya jiahensis sp. nov.

( Figures 2 , 3B )

Type material. Holotype male: China, Guangxi Province, Guilin City, Lingui District, Lingui Town , Jiahe Garden , 25º15.134’ N, 110º12.125’ E, 156 m a.s.l., 18 February 2019, Yun-Chun Li leg., in MCWNU (Ar-Ps-GX-0003).

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 (many small bulges) and one basal tubercle on prolateral face, hand with 42 tooth-shaped tubercles (retrolateral view). Fixed finger with 94 small cusped teeth, movable finger with 89 teeth. Pedipalpal femur 4.25× longer than broad, length 1.64 mm; chela (with pedicel) 5.19× longer than broad, length 2.93 mm; ratio movable chelal finger/chelal hand (with pedicel) 1.40×.

Etymology. Latinised adjective, derived from the type locality, namely Jiahe Garden.

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

Carapace ( Fig. 2A ): 1.34× longer than broad, with four well-developed eyes; two anterior eyes length 0.11 mm, breadth 0.08 mm; two posterior eyes length 0.09 mm, breadth 0.06 mm; anterior margin with distinct epistome, triangular. Carapace surface with ten lyrifissures. A total of 28 setae, including six on the anterior margin and seven on the posterior margin.

Chelicera: Hand with six setae and one or two lyrifissures dorsally, movable finger with one submedial seta; fixed cheliceral finger with nine teeth, movable finger with five teeth ( Fig. 2B ). Galea divided into two main branches, one of them forked apically. Serrula exterior with about 37 blades and serrula interior with 32, rallum composed of six blades.

Pedipalp ( Figs 2E–I ): pedipalpal femur with one distal tubercle (many small bulges) and one basal tubercle on the prolateral face, and six lyrifissures, patella with four lyrifissures, hand with 42 tooth-shaped tubercles basal to fixed chelal finger base (retrolateral view), each tooth-shaped tubercle has a seta at the base ( Figs 2F, G ). Trochanter 1.94×, femur 4.25×, patella 4.30× longer than broad, femur 1.09× longer than patella. Chela (with pedicel) 5.19×, hand (with pedicel) 2.26× longer than broad; movable chelal finger 1.40× longer than hand (with pedicel) length. Fixed finger with 94 small cusped teeth, movable finger with 89 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: 9: 11: 10: 11: 11: 11: 11: 7; sternal chaetotaxy (IV–XI): 29: 18: 14: 19: 15: 15: 12: 9; anal cone with two dorsal and two ventral setae. Tergite XI with two tactile setae. Manducatory process with five setae. Pedipalpal coxa with 14 setae, coxa I 7, II 8, III 8, IV15 setae. Anterior genital operculum with 27 setae and without lyrifissures; posterior operculum with 25 setae, two lyrifissures ( Fig. 2D ). Sternites V 2, VI 13, VII 13, VIII 11 medial scattered glandular setae ( Fig. 2C ).

Legs: Leg I: trochanter 1.08× longer than deep, femur 3.09× longer than deep and 1.01× longer than patella, patella 3.09× longer than deep, tibia 4.16× longer, basitarsus 3.14× longer, telotarsus 4.50× longer than deep, telotarsus 1.06× longer than basitarsus. Leg IV: trochanter 2.62× longer than deep, femur + patella 3.71× longer than deep, femur shorter than patella, tibia 7.24× longer than deep, basitarsus 4.41× longer, telotarsus 7.34× longer than deep. Tactile setae probably present (most setae lacking) on basitarsus (near basally of segment), telotarsus with 2 tactile setae (basally, TS = 0.25; distally, TS = 0.43), subterminal seta forked, arolia shorter than claws.

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

Males: Body length 3.58. Carapace 1.31/0.97. Pedipalp: trochanter 0.73/0.37, femur 1.64/0.39, patella 1.50/0.35, hand (with pedicel) 1.27/0.56, length of movable chelal finger 1.78, chela 2.93/0.56. Leg I: trochanter 0.36/0.33, femur 0.89/0.29, patella 0.88/0.28, tibia 0.69/0.17, basitarsus 0.41/0.13, telotarsus 0.44/0.10. Leg IV: trochanter 0.61/0.23, femur + patella 1.43/0.38, tibia 1.31/0.18, basitarsus 0.54/0.12, telotarsus 0.80/0.11.

Distribution. China (Guangxi).

Figures

FIGURE 2. Stenohya jiahensis sp. nov., holotype male (A–J). A carapace; B left chelicera; C sternites V–VIII with medial discal setae right; D male genital area; E palp (minus chela); F pedipalp hand, retrolateral view; G chela, retrolateral view; H chela, dorsal view; I 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.