Stenohya jiaxiani Zhao, Guo & Zhang, 2025

Zhao, Jiaqi, Guo, Xiangbo, Gao, Zhizhong & Zhang, Feng, 2025, Review of the pseudoscorpion genus Stenohya Beier, 1967 from China (Pseudoscorpiones, Neobisiidae), European Journal of Taxonomy 993, pp. 1-104 : 51-58

publication ID	https://doi.org/10.5852/ejt.2025.993.2909
publication LSID	lsid:zoobank.org:pub:697E434D-7C75-42BC-9943-367D46743DEB
DOI	https://doi.org/10.5281/zenodo.15555863
persistent identifier	https://treatment.plazi.org/id/ED4EC161-FFBF-FF89-FE39-F9B9BCDAD27B
treatment provided by	Plazi
scientific name	Stenohya jiaxiani Zhao, Guo & Zhang
status	sp. nov.

Treatment

Stenohya jiaxiani Zhao, Guo & Zhang sp. nov. (DZŵ狭伪$)

urn:lsid:zoobank.org:act:91E221DA-7E1A-48F6-8EAF-E6B0B45B43F0

Figs 1.10 View Fig , 37–41 View Fig View Fig View Fig View Fig View Fig , 69M View Fig , 70M View Fig

Diagnosis

Male pedipalpal femur with a curved cylindrical protuberance in the middle part, as well as a projection in the subdistal position ( Figs 38I View Fig , 39D View Fig ). Basitarsus and telotarsus fused and bent in male leg I, femur of leg I bent ( Figs 38J View Fig , 39F View Fig ). Female carapace with 27–28 setae; pedipalpal trochanter 1.95–2.00 times as long as broad; pedipalpal patella 3.15–3.16 times as long as broad; pedipalpal chela (with pedicel) 4.07–4.15 times as long as broad; pedipalpal fixed chelal finger with 106–108 teeth.

Etymology

The specific epithet is a patronym in honour of Jiaxian Gong, who collected the specimens.

Type material

Holotype CHINA • ♂; Fujian Province, Dehua County, Jiuxian Mountain ; 25°41′28″ N, 118°06′40″ E; 1265 m a.s.l.; 13 Jan. 2024; Jiaxian Gong, Yanbin Yao, Han Gao, Mingxuan Wu and Rui Zhao leg.; Ps.- MHBU-FJ2024011301 . GoogleMaps

Paratypes CHINA • 4 ♂♂, 2 ♀♀; same collection data as for holotype; Ps.- MHBU-FJ2024011302–07 GoogleMaps .

Description

Adult males (holotype and male paratypes) ( Fig. 37A View Fig )

CARAPACE ( Figs 38A View Fig , 39A View Fig , 69M View Fig ). Carapace 1.14–1.17 times as long as broad, with a total of 30–34 setae, including six near anterior margin and 6–7 near posterior margin; five lyrifissures near the eyes, two lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes. Carapace with elevations in the middle of the eye area and near middle of carapace in lateral view.

CHELICERA ( Figs 38B View Fig , 39B View Fig ). Hand with seven setae and two lyrifissures, movable finger with one seta; fixed finger with 12–14 teeth; movable finger with five teeth; serrula exterior with 48–49 lamellae; serrula interior with 36–38 lamellae; galea developed, divided into two main branches, one branch secondarily divided into five terminal rami, the other branch secondarily divided into three terminal rami ( Fig. 38E View Fig ); rallum consisting of 8–9 blades, all with anteriorly directed spinules, the basalmost blade shortest ( Fig. 38C View Fig ).

PEDIPALPS ( Figs 38G–I View Fig , 39C–D View Fig ). Apex of pedipalpal coxa rounded, with six long setae. Trochanter with some small granulations, femur with some small tubercles mainly surrounding the basal to median area in the prolateral and retrolateral position, femur with a curved cylindrical protuberance in the middle part, as well as a projection in the subdistal position ( Figs 38I View Fig , 39D View Fig ); patella smooth ( Figs 38I View Fig , 39D View Fig ); chelal hand with 22–26 small, triangular, spinous apophyses in the middle of the dorsal side, each spinous apophysis with a seta at the base, a few spinous apophyses extended onto the dorsal face of fixed finger ( Figs 38G–H View Fig , 39C–D View Fig ). Trochanter 1.82–2.12, femur 4.66–4.93, patella 3.86–3.87, chela (with pedicel) 5.04–5.34, chela (without pedicel) 4.86–5.05 times as long as broad, movable finger 1.87–1.88 times as long as hand (without pedicel). Fixed chelal finger with eight, movable chelal finger with four trichobothria: eb and esb situated basally, grouped very closely with ib and isb; est, et and it grouped distally; ist closer to et -est -it than to eb -esb -isb -ib in fixed chelal finger; b and sb situated closer to each other in basal half, st and t close to each other in distal half of movable finger. Venom apparatus present only in fixed chelal finger, venom duct short. Fixed chelal finger with 112–114 pointed teeth, movable finger with 103–106 teeth: 55–59 rounded teeth at base and 47–48 pointed teeth in distal position.

ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 4–5:8: 7–10: 9–11: 10–11: 10:10–11: 12: 11–13: 10–11:12–13, sternal chaetotaxy (IV–XI):27– 30: 25–26: 21–22:21–24: 18–19: 18–21: 13–14: 4–5, sternites VI–VIII with 5–6 medial scattered glandular setae, anal cone with two dorsal and two ventral setae. Genital area ( Figs 38F View Fig , 39E View Fig ): anterior genital sternite with 42–55 setae; posterior genital sternite with 46–54 setae and 4 lyrifissures.

LEGS ( Figs 38J–K View Fig , 39F–G View Fig ). In leg I, femur with marked enlargement distally, patella enlarged, tibia bent, basitarsus and telotarsus fused and bent, the dividing line between the two segments invisible ( Figs 38J View Fig , 39F View Fig ). Leg I: trochanter 1.21–1.27, femur 2.96–3.02, patella 2.30–2.38, tibia 3.07–3.33, basitarsus+ telotarsus 5.21–6.75 times as long as deep. Leg IV: trochanter 2.52–2.64, femur +patella 4.59–4.60, tibia 6.37–7.08, basitarsus 3.71–3.95, telotarsus 7.77–8.08 times as long as deep; tibia with two submedial tactile setae (TS=0.17–0.20, 0.63–0.69), basitarsus with two tactile setae (TS =0.60, 0.84–0.87), telotarsus with two tactile setae (TS =0.17–0.28, 0.58–0.60); subterminal tarsal seta distally branched ( Fig. 38D View Fig ). Arolium not divided, shorter than the slender and simple claws.

Adult females (paratypes) ( Fig. 37B View Fig ) Mostly same as in males, except where noted.

CARAPACE ( Figs 40A View Fig , 41A View Fig , 70M View Fig ). Carapace 1.04–1.07 times as long as broad, with a total of 27–28 setae, including 5–6 near anterior margin and 5–6 near posterior margin; five lyrifissures near the eyes, three lyrifissures near posterior margin. Carapace with elevations near middle in lateral view.

CHELICERA ( Figs 40B View Fig , 41B View Fig ). Fixed finger with 12–13 teeth; movable finger with 6–7 teeth; serrula exterior with 43–49 lamellae; serrula interior with 41–42 lamellae; galea divided into two main branches, one branch secondarily divided into five terminal rami, the other branch secondarily divided into three terminal rami ( Fig. 40E View Fig ); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest ( Fig. 40C View Fig ).

PEDIPALPS ( Figs 40G–I View Fig , 41D–E View Fig ). Apex of pedipalpal coxa with 6–7 long setae. Femur with a few tubercles prolaterally ( Figs 40I View Fig , 41E View Fig ). Trochanter 1.95–2.00, femur 4.71–5.00, patella 3.15–3.16, chela (with pedicel) 4.07–4.15, chela (without pedicel) 3.95–4.02 times as long as broad, movable finger 1.63–1.74 times as long as hand (without pedicel). Fixed chelal finger with 106–108 pointed teeth, movable finger with 96–102 teeth: 55–58 rounded teeth at base and 41–44 pointed in distal position.

ABDOMEN. Tergal chaetotaxy (I–XI): 4–5: 6: 9–12: 10–11:10–11:10–11:10–11:11–12: 11–13:9–11:10– 11, sternal chaetotaxy (IV–XI):24–26: 21–23: 19–23: 22: 18–20:15–16: 11–12: 5–7, sternites VI–VIII with two medial glandular setae; genital area ( Figs 40F View Fig , 41C View Fig ): sternite II with a total of 17–19 setae and two lyrifissures; sternite III with a row of 36–40 setae and two lyrifissures along posterior margin.

LEGS ( Figs 40J–K View Fig , 41F–G View Fig ). Leg I: trochanter 1.24–1.36, femur 4.07–4.10, patella 3.36–3.38, tibia 4.35– 5.38, basitarsus 3.25–3.31, telotarsus 4.00–4.79 times as long as deep. Leg IV: trochanter 2.58–2.64, femur +patella 4.65–4.93, tibia 7.19–7.30, basitarsus 3.63–3.89, telotarsus 5.82–7.47 times as long as deep; tibia with two submedial tactile setae (TS=0.17–0.20; 0.91), basitarsus with two tactile setae (TS =0.17–0.33; 0.87–0.94), telotarsus with two tactile setae (TS=0.27–0.31; 0.60–0.61).

Measurements (in mm; length/breadth or, for legs, length/depth)

Males (holotype and paratypes)

Body length 4.92–5.21. Carapace 1.68–1.70/1.43–1.49. Pedipalpal trochanter 0.93–1.08/0.51, femur 2.17–2.19/0.44–0.47, patella 1.66–1.74/0.43–0.45, chela (with pedicel) 3.98–4.11/0.77–0.79, chela (without pedicel) 3.84–3.89/0.77–0.79, hand (without pedicel) length 1.35–1.40, movable finger length 2.53–2.63. Leg I: trochanter 0.51–0.52/0.41–0.42, femur 1.33/0.44–0.45, patella 1.14–1.15/0.48–0.50, tibia 0.83–0.90/0.27–0.28, basitarsus+telotarsus 0.99–1.08/0.16–0.19. Leg IV: trochanter 0.78– 0.87/0.31–0.33, femur +patella 1.88–1.98/0.41–0.43, tibia 1.70–1.72/0.24–0.27, basitarsus 0.63– 0.75/0.17–0.19, telotarsus 1.01–1.05/0.13.

Females (paratypes)

Body length 6.25–8.06. Carapace 1.57–1.62/1.47–1.56. Pedipalpal trochanter 0.96–1.09/0.48–0.56, femur 2.25–2.40/0.45–0.51, patella 1.55–1.67/0.49–0.53, chela (with pedicel) 4.07–4.27/1.00–1.03, chela (without pedicel) 3.95–4.14/1.00–1.03, hand (without pedicel) length 1.55–1.56, movable finger length 2.53–2.72. Leg I: trochanter 0.45–0.51/0.33–0.41, femur 1.18–1.23/0.29–0.30, patella 0.84– 0.88/0.25–0.26, tibia 0.86–0.87/0.16–0.20, basitarsus 0.52–0.53/0.16, telotarsus 0.60–0.67/0.14–0.15. Leg IV: trochanter 0.85–0.95/0.33–0.36, femur +patella 2.00–2.12/0.43, tibia 1.68–1.87/0.23–0.26, basitarsus 0.69–0.70/0.18–0.19, telotarsus 0.99–1.12/0.15–0.17.

Distribution

China: Fujian Province.

Remarks

This new species is similar to S. guangmingensis in having the completely fused basitarsus +telotarsus in the male leg I, but can be distinguished by the enlarged distal femur (distal femur has an inward depression in S. guangmingensis ) ( Zhao et al. 2024). Females of this new species are similar to those of S. biverticis , S. hainanensis , S. gibba , S. papillata and S. guangmingensis , but can be distinguished by the presence of 27–28 setae on the carapace (39–42 in S. papillata ); the pedipalpal trochanter 1.95–2.00 times as long as broad (1.55–1.81 in S. biverticis ); the pedipalpal patella 3.15–3.16 times as long as broad (3.39–3.46 in S. guangmingensis ); the pedipalpal chela (with pedicel) 4.07–4.15 times as long as wide (4.67–4.98 in S. gibba ); and the presence of 106–108 teeth on the pedipalpal fixed chelal finger (88–89 in S. hainanensis ) ( Guo & Zhang 2016; Zhao et al. 2024).