Stenohya guangmingensis, Zhao & Guo & Zhang, 2024

Zhao, Jiaqi, Guo, Xiangbo & Zhang, Feng, 2024, Three new Stenohya species with sexually dimorphic leg I from China (Pseudoscorpiones, Neobisiidae), ZooKeys 1204, pp. 105-133 : 105-133

publication ID	https://doi.org/ 10.3897/zookeys.1204.123294
publication LSID	lsid:zoobank.org:pub:0CA13BC5-54AD-4782-A883-F282ADA4CDCE
DOI	https://doi.org/10.5281/zenodo.11479224
persistent identifier	https://treatment.plazi.org/id/A75B21E8-E887-58EA-82D3-BBA85CF45E89
treatment provided by	ZooKeys by Pensoft
scientific name	Stenohya guangmingensis
status	sp. nov.

Treatment

Stenohya guangmingensis sp. nov.

Figs 13 View Figure 13 , 14 View Figure 14 , 15 View Figure 15 , 16 View Figure 16 , 17 View Figure 17 , 18 Chinese name. 光明狭伪蝎 View Figure 18

Type material.

Holotype male (Ps. - MHBU - JX 2023013101 ), China: Jiangxi Province, Jinggangshan City, Guangming Township, 868 County Road [26 ° 26 ' 04 " N, 114 ° 12 ' 11 " E], 305 m a. s. l., 31 January 2023, in leaf litter and under rocks (Fig. 14 C, D View Figure 14 ), Xiangbo Guo, Jianzhou Sun, Tao Zheng & Songtao Shi leg. GoogleMaps Paratypes: four males (Ps. - MHBU - JX 2023013102–05 ), three females (Ps. - MHBU - JX 2023013106–08 ), same data as for holotype GoogleMaps .

Etymology.

The specific name refers to the type locality.

Diagnosis.

Carapace with four well-developed eyes, epistome triangular (Figs 15 A View Figure 15 , 16 A View Figure 16 , 17 A View Figure 17 , 18 A View Figure 18 ). Male pedipalpal femur with a large tubercle in the median area, two subdistal projections on the prolateral surface; patella smooth; chelal hand with 23 small, triangular, spinous apophyses on the dorsal side (Figs 15 G, H View Figure 15 , 16 C, E View Figure 16 ). Male leg I femur with an inward depression at the distal part, patella enlarged (Figs 15 I View Figure 15 , 16 F View Figure 16 ). Female carapace 1.02–1.10 times longer than broad; carapace with a total of 29–30 setae; apex of pedipalpal coxa with six long setae; pedipalpal patella 3.39–3.46; pedipalpal movable chelal finger with 92–94 teeth; pedipalpal fixed chelal finger with 95–98 teeth.

Description.

Adult male (holotype and male paratypes) (Figs 13 A View Figure 13 , 14 B View Figure 14 ).

Carapace (Figs 15 A View Figure 15 , 16 A View Figure 16 ). Carapace 1.08–1.16 times longer than broad, with a total of 30–32 setae, including 5–6 near anterior margin and six near posterior margin; with six lyrifissures near the anterior eyes, four lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes; the anterior half of the carapace uplifted and protruded to the sides, the front half significantly wider than the back part.

Chelicera (Figs 15 B View Figure 15 , 16 B View Figure 16 ). Hand with seven setae and two lyrifissures; movable finger with one seta; fixed finger with 13–15 teeth; movable finger with 5–6 teeth; serrula exterior with 40–44 lamellae; serrula interior with 36–38 lamellae; galea developed, divided into three main branches, two main branches consisting of two forks each, and another with three forks (Fig. 15 D View Figure 15 ); rallum consisting of eight blades, all with anteriorly directed spinules, the basal-most blade shortest (Fig. 15 C View Figure 15 ).

Pedipalps (Figs 15 G, H View Figure 15 , 16 C, E View Figure 16 ). Apex of pedipalpal coxa rounded, with 6–7 long setae. Femur with a tubercle in the median area, a big projection on the subdistal prolateral surface, as well as a hook-shaped process near the base of big projection (Figs 15 G View Figure 15 , 16 E View Figure 16 ); patella smooth (Figs 15 G View Figure 15 , 16 E View Figure 16 ); chelal hand with 17–19 small triangular, spinous apophyses at the dorsal side of distal half, each spinous apophysis with a seta at the base; on the posterior side, few small granular processes dispersedly located at the distal of the hand and near the base of fingers, and a few dentate bulges at the basal of the fixed finger; fixed chelal finger slightly curved upward at median to distal part (Figs 15 H View Figure 15 , 16 C View Figure 16 ). Trochanter 1.52–1.83, femur 3.89–5.70, patella 3.53–4.05, chela with pedicel 4.67–4.98, chela without pedicel 4.50–4.80 times longer than broad, movable finger 1.74–2.02 times longer than hand without pedicel. Fixed chelal finger with eight, movable chelal finger with four trichobothria: eb and esb situated on the base of hand, grouped very closely with ib and isb; est, et and it grouped distally; ist situated midway between isb and it; 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 97–99 pointed teeth, movable finger with 91–95 teeth, 45–57 rounded teeth at base, and 38–46 pointed ones.

Abdomen. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I – XI): 4–5: 8–9: 9–11: 9–11: 10–11: 9–11: 9–12: 11–13: 11–12: 8–10: 8–10, sternal chaetotaxy (IV – XI): 23–26: 19–20: 15–19: 13–19: 15–16: 12–14: 10–12: 4–5, sternites VI – VIII with 9–13 medial scattered glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Figs 15 F View Figure 15 , 16 D View Figure 16 ): sternite II with total of 30–35 setae and two lyrifissures; sternite III with 46–56 setae.

Legs (Figs 15 I, J View Figure 15 , 16 F – I View Figure 16 ). The femur with an inward depression at the distal of the leg I, leg I patella enlarged (Figs 15 I View Figure 15 , 16 F View Figure 16 ), and fusing (Figs 15 I View Figure 15 , 16 F, H View Figure 16 ) or semi-fusing (Fig. 16 I View Figure 16 ) of the basitarsus and telotarsus, the dividing line between the basitarsus and telotarsus inconspicuous or slightly visible. Leg IV generally typical, long, and sinewy (Figs 15 J View Figure 15 , 16 G View Figure 16 ). Leg I: trochanter 1.05–1.16, femur 3.47–5.52, patella 2.53–2.90, tibia 3.45–4.29, basitarsus + telotarsus 6.64–6.80 times longer than deep. Leg IV: trochanter 2.36–2.78, femur + patella 4.08–4.88, tibia 6.80–7.56, basitarsus 4.23–4.85, telotarsus 6.62–8.40 times longer than deep; tibia with three submedial tactile setae (TS = 0.16, 0.61, 0.92), basitarsus with two tactile setae (TS = 0.14, 0.83–0.84), telotarsus with two tactile setae (TS = 0.24–0.30, 0.58–0.60); subterminal tarsal seta bifurcate (Fig. 15 E View Figure 15 ). Arolium not divided, shorter than the slender and simple claws.

Adult female (paratype females) (Figs 13 B View Figure 13 , 14 B View Figure 14 ): mostly same as males, except where noted.

Carapace (Figs 17 A View Figure 17 , 18 A View Figure 18 ). Smooth and nearly rectangular, 1.02–1.10 times longer than broad, with a total of 27–31 setae, including 6–7 near anterior margin and 6–7 near posterior margin; with two pair lyrifissures near the anterior eyes, two lyrifissures near posterior margin.

Chelicera (Figs 17 B View Figure 17 , 18 B View Figure 18 ). Fixed finger with 12–13 teeth; movable finger with seven teeth; serrula exterior with 42–45 lamellae; serrula interior with 35–37 lamellae; galea developed, divided into two main branches, one branch five, while the other three (Fig. 17 D View Figure 17 ).

Pedipalps (Figs 17 G, H View Figure 17 , 18 D, E View Figure 18 ). Apex of pedipalpal coxa with six long setae. Femur with some granular projections; trochanter 1.71–2.02; femur 4.90–5.39; patella 3.39–3.46; chela with pedicel 4.13–4.42; chela without pedicel 3.93–4.29 times longer than broad; movable finger 1.62–1.66 times longer than hand without pedicel. Fixed chelal finger with 95–98 pointed teeth, movable finger with 92–94 teeth, 47–48 rounded teeth at base, and 45–46 pointed ones.

Abdomen. Tergal chaetotaxy (I – XI): 4–5: 6–7: 8–9: 9–10: 10: 9: 9–10: 11: 9–12: 10–11: 7–10, sternal chaetotaxy (IV – XI): 24–26: 20–23: 16–17: 17–18: 15: 14: 12–13: 4–5, sternites VI – VIII with two medial scattered glandular setae; genital area (Figs 17 F View Figure 17 , 18 C View Figure 18 ): sternite II with total of 19–23 setae and two lyrifissures; sternite III with a row of 35–37 setae and two lyrifissures along posterior margin.

Legs (Figs 17 I, J View Figure 17 , 18 F, G View Figure 18 ). Leg I: trochanter 1.42–1.52, femur 4.78–5.95, patella 3.45–3.75, tibia 4.50–4.79, basitarsus 3.29–4.20, telotarsus 5.40–5.55 times longer than deep. Leg IV: trochanter 2.48–2.55, femur + patella 4.41–4.58, tibia 7.00–7.83, basitarsus 4.69–4.77, telotarsus 7.67–8.08 times longer than deep; tibia with two submedial tactile setae (TS = 0.20, 0.94), basitarsus with two tactile setae (TS = 0.13–0.15, 0.84–0.87), telotarsus with two tactile setae (TS = 0.23–0.26, 0.54–0.59); subterminal tarsal seta bifurcate (Fig. 17 E View Figure 17 ).

Measurements

(in mm; length / breadth or, for legs, length / depth). Male (holotype and paratypes). Body length 3.66–3.92. Carapace 1.48–1.55 / 1.31 – 1.43. Pedipalpal trochanter 0.64–0.75 / 0.41 – 0.43, femur 1.75–1.88 / 0.33 – 0.45, patella 1.34–1.50 / 0.37 – 0.38, chela with pedicel 3.27–3.30 / 0.66 – 0.70, chela without pedicel 3.15–3.17 / 0.66 – 0.70, hand without pedicel length 1.07–1.20, movable finger length 2.09–2.16. Leg I: trochanter 0.40–0.44 / 0.38, femur 1.11–1.18 / 0.21 – 0.32, patella 1.09–1.13 / 0.39 – 0.43, tibia 0.73–0.76 / 0.17 – 0.22, basitarsus + telotarsus 0.93–1.03 / 0.14 – 0.15. Leg IV: trochanter 0.59–0.71 / 0.23 – 0.26, femur + patella 1.55–1.66 / 0.34 – 0.38, tibia 1.36–1.44 / 0.18 – 0.20, basitarsus 0.55–0.63 / 0.12 – 0.13, telotarsus 0.84–0.90 / 0.10 – 0.13.

Female (paratypes). Body length 4.73–6.31. Carapace 1.34–1.43 / 1.30 – 1.32. Pedipalpal trochanter 0.70–0.85 / 0.41 – 0.42, femur 1.94–1.96 / 0.36 – 0.40, patella 1.42–1.49 / 0.41 – 0.44, chela with pedicel 3.35–3.47 / 0.76 – 0.84, chela without pedicel 3.26–3.30 / 0.76 – 0.84, hand without pedicel length 1.25–1.32, movable finger length 2.07–2.14. Leg I: trochanter 0.37–0.38 / 0.25 – 0.26, femur 0.86–1.13 / 0.18 – 0.19, patella 0.69–0.75 / 0.20, tibia 0.67–0.72 / 0.14 – 0.16, basitarsus 0.42–0.46 / 0.10 – 0.14, telotarsus 0.54–0.61 / 0.10 – 0.11. Leg IV: trochanter 0.77–0.84 / 0.31 – 0.33, femur + patella 1.74–1.81 / 0.33 – 0.41, tibia 1.41–1.47 / 0.18 – 0.21, basitarsus 0.61–0.62 / 0.13, telotarsus 0.92–0.97 / 0.12.

Distribution.

China (Jiangxi).

Remarks.

The dividing line between basitarsus and telotarsus of the male leg I of this new species is usually indistinct in specimens examined, except for one paratype, which has this line slightly visible (Fig. 16 I View Figure 16 ). There is no other distinct difference among these male specimens and, as a result, we consider this difference in the visibility of the dividing lines as intraspecific variation.

The males of S. guangmingensis , S. gibba , and S. papillata have a specialized leg I, but this new species can be separated by having a distal depression on leg I femur. Females of this new species can be distinguished from other Stenohya species by the following: carapace 1.02–1.10 times longer than broad (1.15–1.28 in S. curvata ; 1.13 in S. hainanensis ; 1.33–1.49 in S. huangi ; 1.15–1.28 in S. pengae ; 1.18–1.24 in S. tengchongensis ), the presence of 27–31 setae on carapace (24 in S. bicornuta and S. hainanensis ; 23 in S. meiacantha and S. tengchongensis ; 39–42 in S. papillata ); the presence of six long setae on apex of pedipalpal coxa (eight in S. bicornuta and S. papillata ; 10 in S. spinata ), the pedipalpal patella 3.39–3.46 times longer than broad (2.81–2.86 in S. arcuatа; 4.70–5.31 in S. huangi ; 2.68 in S. meiacantha ; 3.83–3.93 in S. pengae ; 3.53–3.62 in S. spinata ; 2.63–2.67 in S. tengchongensis ); the presence of 92–94 teeth on pedipalpal movable chelal finger (115–119 in S. arcuatа; 68 in S. bomica ; 46–51 in S. huangi ; 76 in S. meiacantha ; 79–87 in S. gibba ; 45–55 in S. pengae ; 76–78 in S. spinata ); and the presence of 95–98 teeth on pedipalpal fixed chelal finger (124–129 in S. arcuatа; 105 in S. bicornuta ; 76 in S. bomica ; 63–69 in S. huangi ; 84 in S. meiacantha ; 66–79 in S. pengae ) ( Zhao and Zhang 2011; Zhao et al. 2011; Hu and Zhang 2012; Yang and Zhang 2013; Guo and Zhang 2016; Guo et al. 2019; Zhan et al. 2023).