Stenohya harveyi Zhao, Guo & Zhang sp. nov. (哈氏狭伪$)

urn:lsid:zoobank.org:act: F709222D-882E-42B5-BFDF-1CAB3FE060EA

Figs 1.17, 25– 30, 69E, 70B

Diagnosis

Male pedipalpal chelal hand has a projection with bifid horn-like bulge on prolateral surface near base of finger (Figs 27H, 28E–F); pedipalpal fixed chelal finger with 67–70 teeth; pedipalpal movable chelal finger with 61–64 teeth. Female pedipalpal fixed chelal finger with 73–74 teeth; pedipalpal movable chelal finger with 63–64 teeth.

Etymology

The specific epithet is a patronym in honor of Dr Mark Harvey, who has provided significant contributions to the study of pseudoscorpions worldwide.

Type material

Holotype CHINA • ♂; Yunnan Province, Yunlong County, Caojian town; 25°44′03″ N, 99°07′38″ E; 2554 m a.s.l.; 1 Apr. 2024; in leaf litter (Fig. 2E); Jiaqi Zhao, Jianzhou Sun, Songtao Shi & Xiaoru Qi leg.; Ps.- MHBU-YN2024040101.

Paratypes CHINA • 1 ♂, 5 ♀♀; same collection data as for holotype; Ps.- MHBU-YN2024040102–07 .

Description

Adult males (holotype and male paratype) (Figs 25A, 26A)

CARAPACE (Figs 27A, 28A, 69E). Carapace 1.25–1.27 times as long as broad, with a total of 24–26 setae, including six near anterior margin and six near posterior margin; two lyrifissures near the eyes, four lyrifissures near posterior margin; epistome small, triangular, with a rounded top; with four corneate eyes. Carapace smooth and nearly rectangular.

CHELICERA (Figs 27B, 28B). Hand with seven setae and two lyrifissures, movable finger with one seta; fixed finger with 14–15 teeth; movable finger with 4–5 teeth; serrula exterior with 36–37 lamellae; serrula interior with 30–31 lamellae; galea developed, divided into two main branches, one branch secondarily divided into two terminal rami, the other branch secondarily divided into three terminal rami (Fig. 27E); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 27C).

PEDIPALPS (Figs 27G–I, 28C, E–F). Apex of pedipalpal coxa rounded, with 5–6 long setae. Femur and patella with a few tubercles prolaterally (Figs 27I, 28E); chelal hand with a projection on prolateral surface near base of finger, and the projection with a bifid horn-like bulge; movable finger enlarged at the base, and swollen downward ventrally (Figs 27G–H, 28C, E–F). Trochanter 1.42–1.82, femur 5.07–5.41, patella 3.92–4.16, chela (with pedicel) 4.55–4.86, chela (without pedicel) 4.22–4.55 times as long as broad, movable finger 2.09–2.11 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 67–70 pointed teeth, movable finger with 61–64 teeth: 25–27 rounded teeth at base and 34–39 pointed teeth in distal position.

ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 6:8–9: 9: 9–10:10–12:10–11: 11–12:11–12:11–12:9–11:10–11, sternal chaetotaxy (IV–XI):22:24– 27:21–22:20–21:19–20:19–20:13–15: 5, sternites VI–VIII with 7–10 medial scattered glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Figs 27F, 28D): anterior genital sternite with 37–38 setae and two lyrifissures; posterior genital sternite with 33–40 setae and two lyrifissures.

LEGS (Figs 27J–K, 28G–H). Leg I: trochanter 1.23–1.24, femur 4.65–5.07, patella 3.18–3.33, tibia 4.29– 5.36, basitarsus 3.60–5.13, telotarsus 4.20–5.50 times as long as deep. Leg IV: trochanter 2.10–2.65, femur +patella 4.38–4.53, tibia 6.29–7.13, basitarsus 4.45–4.70, telotarsus 6.09–6.80 times as long as deep; tibia with two submedial tactile setae (TS= 0.16–0.19, 0.68–0.74), basitarsus with three tactile setae (TS=0.13–0.14, 0.51, 0.88–0.89), telotarsus with two tactile setae (TS= 0.36–0.38, 0.61–0.62); subterminal tarsal seta distally branched (Fig. 27D). Arolium not divided, shorter than the slender and simple claws.

Adult females (paratypes) (Figs 25B, 26B)

Mostly same as in males, except where noted.

CARAPACE (Figs 29A, 30A, 70B). Carapace 1.13–1.16 times as long as broad, with a total of 23 setae, including 6–7 near anterior margin and 5 near posterior margin; three lyrifissures near the eyes, two lyrifissures near posterior margin. Carapace smooth and nearly rectangular.

CHELICERA (Figs 29B, 30B). Fixed finger with 13–19 teeth; movable finger with 5–8 teeth; serrula exterior with 36–37 lamellae; serrula interior with 25–34 lamellae; galea divided into two main branches, each branch secondarily divided into three terminal rami (Fig. 29E); rallum consisting of 7–8 blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 29C).

PEDIPALPS (Figs 29G–I, 30D–E). Apex of pedipalpal coxa with 5–6 long setae. Femur and patella with a few tubercles prolaterally (Figs 29I, 30D). Trochanter 1.72–1.82, femur 4.68–4.90, patella 3.44–3.68, chela (with pedicel) 4.32–4.34, chela (without pedicel) 4.16–4.20 times as long as broad, movable finger 1.50–1.53 times as long as hand (without pedicel). Fixed chelal finger with 73–74 pointed teeth, movable finger with 63–64 teeth: 26–29 rounded teeth at base and 34–38 pointed in distal position.

ABDOMEN. Tergal chaetotaxy (I–XI): 4–8: 8: 9–11:10: 9–10:8–12: 10–12:9–12:9–10: 9: 6–9, sternal chaetotaxy (IV–XI):16–18: 19–20: 19–22: 19–21: 16–20:13–16: 10–16: 4–5, sternites VI–VIII with two medial glandular setae; genital area (Figs 29F, 30C): sternite II with a total of 17–19 setae and two lyrifissures; sternite III with a row of 25–26 setae and two lyrifissures.

LEGS (Figs 29J–K, 30F–G). Leg I: trochanter 1.04–1.14, femur 4.93–5.47, patella 3.40–4.00, tibia 4.92– 5.27, basitarsus 4.00–4.44, telotarsus 4.89–5.63 times as long as deep. Leg IV: trochanter 1.88–2.21, femur +patella 4.63–4.70, tibia 6.00–7.19, basitarsus 4.36–4.55, telotarsus 6.00–7.78 times as long as deep; tibia with two submedial tactile setae (TS=0.69–0.71, 0.88–0.99), basitarsus with two tactile setae (TS =0.54–0.66, 0.92), telotarsus with three tactile setae (TS= 0.13–0.17, 0.42–0.47, 0.67–0.68).

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

Males (holotype and paratype)

Body length 3.09–3.27. Carapace 1.06–1.13/0.85–0.89. Pedipalpal trochanter 0.51–0.62/0.34–0.36, femur 1.42–1.57/0.28–0.29, patella 1.33–1.41/0.32–0.36, chela (with pedicel) 2.38–2.50/0.49–0.55, chela (without pedicel) 2.23–2.32/0.49–0.55, hand (without pedicel) length 0.75–0.77, movable finger length 1.58–1.61. Leg I: trochanter 0.26–0.27/0.21–0.22, femur 0.76–0.79/0.15–0.17, patella 0.50– 0.54/0.14–0.17, tibia 0.59–0.60/0.11–0.14, basitarsus 0.36–0.41/0.08–0.10, telotarsus 0.42–0.44/0.08– 0.10. Leg IV: trochanter 0.42–0.53/0.20, femur +patella 1.27–1.36/0.29–0.30, tibia 1.07–1.14/0.16– 0.17, basitarsus 0.47–0.49/0.10–0.11, telotarsus 0.67–0.68/0.10–0.11.

Females (paratypes)

Body length 3.84–4.20. Carapace 1.03–1.05/0.89–0.93. Pedipalpal trochanter 0.50–0.60/0.29–0.33, femur 1.45–1.47/0.30–0.31, patella 1.14–1.17/0.31–0.34, chela (with pedicel) 2.46–2.56/0.57–0.59, chela (without pedicel) 2.37–2.48/0.57–0.59, hand (without pedicel) length 0.98–1.04, movable finger length 1.50–1.56. Leg I: trochanter 0.24–0.25/0.22–0.23, femur 0.74–0.82/0.15, patella 0.48–0.51/0.12– 0.15, tibia 0.58–0.59/0.11–0.12, basitarsus 0.36–0.40/0.09, telotarsus 0.44–0.45/0.08–0.09. Leg IV: trochanter 0.45–0.53/0.24, femur +patella 1.27–1.39/0.27–0.30, tibia 1.02–1.15/0.16–0.17, basitarsus 0.48–0.50/0.11, telotarsus 0.60–0.70/0.09–0.10.

Distribution

China: Yunnan Province.

Remarks

The presence of a bifid horn-like projection on the prolateral face of the chela has previously been reported for S. bicornuta (Guo et al. 2019) . Males of the new species can be distinguished as follows: the pedipalpal femur has sparse tubercles prolaterally (pedipalpal femur with multiple tubercles prolaterally in S. bicornuta); the presence of 67–70 teeth on the pedipalpal fixed chelal finger (91–94 in S. bicornuta) and the presence of 61–64 teeth on the pedipalpal movable chelal finger (72 in S. bicornuta). Females of this new species are similar to those of S. biverticis, S. guangmingensis, S. hainanensis and S. papillata, but can be distinguished by the presence of 73–74 teeth on pedipalpal fixed chelal finger (89–103 in S. biverticis; 95–98 in S. guangmingensis; 88–89 in S. hainanensis; 99–102 in S. papillata) and the presence of 63–64 teeth on pedipalpal movable chelal finger (96–98 in S.hainanensis; 90–94 in S. papillata; 92–94 in S. guangmingensis; 89–93 in S. biverticis) (Guo & Zhang 2016; Zhao et al. 2024).