Stenohya dongtianensis Li & Shi, 2023

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 : 27-33

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.15555843
persistent identifier	https://treatment.plazi.org/id/ED4EC161-FF97-FF90-FE41-FE8FBCEBD7F7
treatment provided by	Plazi
scientific name	Stenohya dongtianensis Li & Shi, 2023
status

Treatment

Stenohya dongtianensis Li & Shi, 2023 (AE田狭伪$)

Figs 1.25 View Fig , 19– 23 View Fig View Fig View Fig View Fig View Fig , 69O View Fig , 70O View Fig

Stenohya dongtianensis Li & Shi, 2023: 388–390 View Cited Treatment , figs 1, 3a.

Diagnosis

Male pedipalpal femur with two closely situated protuberances at a distance of ⅔ from the base, and a projection on the subterminal prolateral surface ( Fig. 21D View Fig ). Female pedipalpal movable chelal finger length 2.22 mm.

Material examined

CHINA • 2 ♂♂, 3 ♀♀; Guangxi Zhuang Autonomous Region, Xingan County, Rudongyan ; 25°34′04″ N, 110°37′45″ E; 257 m a.s.l.; 20 Jan. 2024; in leaf litter and under rocks ( Fig. 2G View Fig ); Jiaqi Zhao, Jianzhou Sun and Yiting Xu leg.; Ps.- MHBU-GX2024012001–05 GoogleMaps • 3 ♀♀; Guangxi Zhuang Autonomous Region, Xingan County, Rudongyan ; 25°34′04″ N, 110°37′47″ E; 234 m a.s.l.; 29 Nov. 2023; in leaf litter and under rocks; Jiaqi Zhao, Jianzhou Sun, Tao Zheng and Songtao Shi leg.; Ps.- MHBU-GX2023112901–03 GoogleMaps .

Description

Adult males ( Figs 19A View Fig , 20A View Fig )

CARAPACE ( Figs 21A View Fig , 69O View Fig ). Carapace 1.23–1.24 times as long as broad, with a total of 32–34 setae, including six near anterior margin and 7–8 near posterior margin; four corneate eyes; seven lyrifissures near the anterior margin, three lyrifissures near posterior margin; epistome triangular, with heavily rounded apex. Carapace with a slight elevation in the middle of the eye area and a marked elevation near middle of carapace in lateral view.

CHELICERA ( Fig. 21B View Fig ). Hand with 6–7 setae and two lyrifissures, movable finger with one seta; fixed finger with 15–16 teeth; movable finger with 4–6 teeth; serrula exterior with 42–43 lamellae; serrula interior with 40–41 lamellae; galea developed, divided into two main branches, one branch secondarily divided into four terminal rami, the other branch secondarily divided into three terminal rami; rallum consisting of eight blades, all with anteriorly-directed spinules, the basalmost blade shortest.

PEDIPALPS ( Fig. 21D–E View Fig ). Apex of pedipalpal coxa rounded, with five long setae; femur with some small tubercles mainly surrounding the basal to median area in the dorsal position, closely situated the two protuberances at a distance of ⅔ from the base, and a projection on the subterminal prolateral surface; chelal hand with 9–14 triangular-shaped, spinous apophyses on the dorsal side, each apophysis with a seta at the base, a few spinous apophyses extended to the subbase of fixed finger, chelal hand swelling on the median dorsal side. Trochanter 1.68–1.75, femur 4.30–4.95, patella 3.49–3.95, chela (with pedicel) 4.78–4.79, chela (without pedicel) 4.58–4.61 times as long as broad, movable finger 1.66–1.79 times as long as hand (without pedicel). Fixed chelal finger with eight, movable finger with four trichobothria: eb, esb, ib and isb located basally of fixed chelal finger, est, et and it situated distally of fixed chelal finger, 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 finger with 102–112 pointed teeth, movable finger with 93–100 teeth: 46–58 rounded teeth at base and 42–47 pointed in distal position.

ABDOMEN. Pleural membrane granulated. Tergal chaetotaxy (I–XI): 4–5:8–9: 9–10: 10: 10–11: 11– 12: 12–13: 12–13:11–14: 11–13: 11, sternal chaetotaxy (IV–XI):22–25: 21–22: 20–23: 20: 17–18:15– 19: 11–13: 5. Sternites VI–VIII with 10–15 medial scattered glandular setae. Genital area ( Fig. 21C View Fig ): sternite II with a total of 39–40 setae and two lyrifissures; sternite III with a row of 32–36 setae and two lyrifissures.

LEGS ( Fig. 21F–G View Fig ). In leg I, patella enlarged, basitarsus and telotarsus semi-fused, the dividing line between the two segments visible. Leg I: trochanter 1.03–1.19, femur 3.18–3.24, patella 2.53–2.64, tibia 4.39–4.82, basitarsus 3.29–3.91, telotarsus 4.00–4.62 times as long as deep. Leg IV: trochanter 2.62–2.71, femur +patella 4.34–4.55, tibia 6.77–7.45, basitarsus 3.69–4.77, telotarsus 6.77–7.58 times as long as deep; tibia with one submedial tactile seta (TS=0.64–0.68), basitarsus with two tactile setae (TS =0.15–0.17, 0.84–0.86), telotarsus with two tactile setae (TS =0.19–0.25, 0.57–0.58); subterminal tarsal seta distally branched. Arolium not divided, shorter than the slender and simple claws.

Adult females ( Figs 19B View Fig , 20B View Fig )

CARAPACE ( Figs 22A View Fig , 23A View Fig , 70O View Fig ). Carapace 1.02–1.12 times as long as broad, with a total of 29–35 setae, including 5–7 near anterior margin and 7–8 near posterior margin; four corneate eyes; five lyrifissures near the anterior margin, five lyrifissures near posterior margin; epistome triangular, with heavily rounded apex. Carapace with a slight elevation in the middle of the eye area in lateral view.

CHELICERA ( Figs 22B View Fig , 23B View Fig ). Hand with seven setae and two lyrifissures, movable finger with one seta; fixed finger with 10–13 teeth; movable finger with 5–6 teeth; serrula exterior with 45–47 lamellae; serrula interior with 41–42 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. 22E View Fig ); rallum consisting of seven blades, all with anteriorly directed spinules, the basalmost blade shortest ( Fig. 22C View Fig ).

PEDIPALPS ( Figs 22G–I View Fig , 23D–E View Fig ). Apex of pedipalpal coxa rounded, with five long setae; femur straight, with a few tubercles prolaterally ( Figs 22I View Fig , 23D View Fig ); patella claviform, smooth ( Figs 22I View Fig , 23D View Fig ); chela smooth ( Figs 22G–H View Fig , 23D–E View Fig ). Trochanter 1.59–1.82, femur 4.51–4.73, patella 3.29–3.48, chela (with pedicel) 4.14–4.24, chela (without pedicel) 3.97–4.04 times as long as broad, movable finger 1.66– 1.71 times as long as hand (without pedicel). Fixed chelal finger with eight, movable finger with four trichobothria: eb, esb, ib and isb located basally of fixed chelal finger, est, et and it situated distally of fixed chelal finger, 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 finger with 95–102 pointed teeth, movable finger with 87–91 teeth: 43 rounded teeth at base and 44–48 pointed in distal position.

ABDOMEN. Pleural membrane granulated. Tergal chaetotaxy (I–XI): 4–6: 8:8–9: 10: 10–12: 11– 12: 12: 11–12:11–12: 10–12: 9, sternal chaetotaxy (IV–XI):22–25: 20–22: 19–21: 16–20: 16:16– 17: 12: 4–5. Sternites VI–VIII with two medial glandular setae. Genital area ( Figs 22F View Fig , 23C View Fig ): sternite II with a total of 20–21 setae and two lyrifissures; sternite III with a row of 30–31 setae and two lyrifissures.

LEGS ( Figs 22J–K View Fig , 23F–G View Fig ). Leg I: trochanter 1.08–1.33, femur 3.84–4.00, patella 3.14–3.17, tibia 4.50–5.47, basitarsus 3.23–3.43, telotarsus 4.62–4.69 times as long as deep. Leg IV: trochanter 2.46– 2.87, femur+patella 4.62–4.63, tibia 6.12–7.05, basitarsus 3.24–3.80, telotarsus 6.14–6.71 times as long as deep; tibia with two submedial tactile setae (TS=0.23, 0.99), basitarsus with two tactile setae (TS=0.16–0.18, 0.88–0.98), telotarsus with two tactile setae (TS =0.18–0.23, 0.53–0.65); subterminal tarsal seta distally branched ( Fig. 22D View Fig ). Arolium not divided, shorter than the slender and simple claws.

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

Males

Body length 4.07–4.39. Carapace 1.42–1.51/1.15–1.22. Pedipalpal trochanter 0.74–0.77/0.44, femur 1.89–1.98/0.40–0.44, patella 1.50–1.62/0.41–0.43, chela (with pedicel) 3.35–3.49/0.70–0.73, chela (without pedicel) 3.23–3.34/0.70–0.73, hand length (without pedicel) 1.21–1.31, movable finger length 2.17. Leg I: trochanter 0.39–0.44/0.37–0.38, femur 1.05–1.10/0.33–0.34, patella 0.74–0.76/0.28–0.30, tibia 0.79–0.82/0.17–0.18, basitarsus 0.43–0.46/0.11–0.14, telotarsus 0.60/0.13–0.15. Leg IV: trochanter 0.65–0.76/0.24–0.29, femur +patella 1.65–1.73/0.38, tibia 1.49/0.20–0.22, basitarsus 0.59–0.62/0.13– 0.16, telotarsus 0.88–0.91/0.12–0.13.

Females

Body length 5.80–6.09. Carapace 1.34–1.51/1.31–1.35. Pedipalpal trochanter 0.73–0.82/0.45–0.46, femur 1.94–2.08/0.43–0.44, patella 1.58–1.60/0.46–0.48, chela (with pedicel) 3.48–3.64/0.82–0.88, chela (without pedicel) 3.31–3.49/0.82–0.88, hand length (without pedicel) 1.30–1.34, movable finger length 2.22. Leg I: trochanter 0.39–0.44/0.33–0.36, femur 0.96–1.04/0.25–0.26, patella 0.69–0.73/0.22– 0.23, tibia 0.81–0.82/0.15–0.18, basitarsus 0.42–0.48/0.13–0.14, telotarsus 0.60–0.61/0.13. Leg IV: trochanter 0.69–0.89/0.28–0.31, femur +patella 1.76–1.80/0.38–0.39, tibia 1.53–1.55/0.22–0.25, basitarsus 0.55–0.57/0.15–0.17, telotarsus 0.86–0.94/0.14.

Distribution

China: Guangxi Zhuang Autonomous Region.

Remarks

Stenohya dongtianensis was described from a single male specimen by Li & Shi (2023). In this study, more specimens were examined from the type locality (Rudongyan in Xingan County, Guangxi Zhuang Autonomous Region, China), including two adult males and six adult females, which allows the first description of the female. Like some other species of Stenohya , S. dongtianensis has sexually dimorphic pedipalps and leg I. The male pedipalp femur has two closely situated protuberances at a distance of ⅔ from the base and a projection on the subterminal prolateral surface; the chelal hand has 9–14 triangular-shaped, spinous apophyses on the dorsal side, while the female femur only has few tubercles prolaterally. In the male leg I, patella is enlarged, the basitarsus and telotarsus are semi-fused, the dividing line between the two segments is visible, but absent in the female.

Females of this new species are similar to those of S. biverticis , S. gruberi , S. guangmingensis and S. hamata , but can be distinguished by the following: pedipalpal movable chelal finger length 2.22 mm (2.05–2.13 in S. biverticis , 1.89 in S. gruberi , 2.07–2.14 in S. guangmingensis and 1.53–1.67 in S. hamata ) ( Ćurčić 1983; Leclerc & Mahnert 1988; Zhao et al. 2024).