Stenohya cordata Zhao, Guo & Zhang 2025, sp. nov.

Stenohya cordata Zhao, Guo & Zhang sp. nov. (爱心狭伪$) urn:lsid:zoobank.org:act: F34EDFB7-AFAF-4137-93D6-63A942B88249 Figs 1.22, 12– 18, 69S, 70P, 71B Diagnosis Male pedipalpal femur with a heart-shaped protuberance medially and a projection on the subterminal prolateral surface (Figs 14I, 15E); pedipalpal patella with a small, triangular-shaped projection on the prolateral face (Figs 14I, 15E); femur, basitarsus and telotarsus of leg I bent, the dividing line between the basitarsus and telotarsus visible (Figs 14J, 15F). Female pedipalpal femur 4.30–4.54 times as long as broad, pedipalpal patella 2.93–3.23 times as long as broad. Etymology The specific epithet is derived from the Latin word ‘ cordatus ’ meaning ‘cordiform’ and ‘heart-shaped’, which refers to the shape of the projections on the male pedipalpal femur on the subterminal prolateral surface; adjective. Type material Holotype CHINA • ♂; Guangxi Zhuang Autonomous Region, Xiufeng District, Reed Flute Scenic Spot; 25°18′34″ N, 110°16′27″ E; 203 m a.s.l.; 15 Jan. 2024; in leaf litter and under rocks (Fig. 2D); Jiaqi Zhao, Jianzhou Sun and Yiting Xu leg.; Ps.- MHBU-GX2024011501. Paratypes CHINA • 3 ♂♂, 2 ♀♀; same collection data as for holotype; Ps.- MHBU-GX2024011502–06 • four tritonymphs; same locality as for holotype; 25°18′24″ N, 110°16′43″ E; 253 m a.s.l.; 1 Dec. 2023; in leaf litter; Jiaqi Zhao, Jianzhou Sun, Tao Zheng and Songtao Shi leg.; Ps.- MHBU-GX2023120101–04. Description Adult males (holotype and male paratypes) (Figs 12A, 13A) CARAPACE (Figs 14A, 15A, 69S). Carapace 1.17–1.22 times as long as broad, with a total of 33 setae, including six near anterior margin and five near posterior margin; eight lyrifissures near the eyes, five lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes. Carapace with slight elevations in the middle of the eye area and the posterior half of carapace in lateral view. CHELICERA (Figs 14B, 15B). Hand with 6–7 setae and two lyrifissures, movable finger with one seta; fixed finger with 14–15 teeth; movable finger with six teeth; serrula exterior with 37–39 lamellae; serrula interior with 35–36 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 (Fig. 14E); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 14C). PEDIPALPS (Figs 14G–I, 15C, E). Apex of pedipalpal coxa rounded, with five long setae. Trochanter with some small granulations, femur with some small tubercles mainly surrounding the basal to median area in the prolateral position, a heart-shaped protuberance medially and a projection on the subterminal prolateral surface (Figs 14I, 15E); patella with a small, triangular projection in the prolateral position (Figs 14I, 15E); chelal hand with 31–34 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 (Figs 14G–H, 15C, E). Trochanter 1.74–1.76, femur 3.83–3.93, patella 3.65–3.84, chela (with pedicel) 5.03–5.16, chela (without pedicel) 4.73–4.95 times as long as broad, movable finger 1.59–1.69 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 93–99 pointed teeth, movable finger with 80–97 teeth: 43–45 rounded teeth at base and 37–52 pointed teeth in distal position. ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 4–5:7: 9–10: 11: 10:10–12: 10–11: 10–14: 12: 11–12: 9–13, sternal chaetotaxy (IV–XI): 24–25:22– 23: 20–21: 18–20:18: 14–15: 12–14: 5–7, sternites VI–VIII with 8–11 medial scattered glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Figs 14F, 15D): anterior genital sternite with 28–31 setae and two lyrifissures; posterior genital sternite with 38–43 setae and two lyrifissures. LEGS (Figs 14J–K, 15F–G). In leg I, femur bent and with a marked enlargement distally, patella enlarged, basitarsus and telotarsus semi-fused and bent, the dividing line between the two segments visible (Figs 14J, 15F). Leg I: trochanter 1.17–1.23, femur 2.52–2.71, patella 4.19–4.43, tibia 4.31– 4.38, basitarsus 3.50–3.92, telotarsus 2.83–3.08 times as long as deep. Leg IV: trochanter 2.18–2.83, femur +patella 4.23–4.29, tibia 3.79–6.83, basitarsus 4.08–4.33, telotarsus 7.00–7.18 times as long as deep; tibia with two submedial tactile setae (TS=0.19, 0.71–0.73), basitarsus with two tactile setae (TS =0.13–0.14, 0.83–0.87), telotarsus with two tactile setae (TS =0.18–0.25, 0.52–0.60); subterminal tarsal seta distally branched (Fig. 14D). Arolium not divided, shorter than the slender and simple claws. Adult females (paratypes) (Figs 12B, 13B) Mostly same as in males, except where noted. CARAPACE (Figs 16A, 17A, 70P). Carapace 1.10 times as long as broad, with a total of 27–33 setae, including six near anterior margin and 5–6 near posterior margin; six lyrifissures near the eyes, two lyrifissures near posterior margin. Carapace with an elevation in the middle of the eye area in lateral view. CHELICERA (Figs 16B, 17B). Fixed finger with 12–15 teeth; movable finger with 7–8 teeth; serrula exterior with 40–41 lamellae; serrula interior with 34–36 lamellae; galea divided into two main branches, one branch secondarily divided into four terminal rami, the other branch secondarily divided into three terminal rami (Fig. 16E); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 16C). PEDIPALPS (Figs 16G–I, 17D–E). Apex of pedipalpal coxa with five long setae. Femur with a few tubercles prolaterally. Trochanter 1.78–1.85, femur 4.30–4.54, patella 2.93–3.23, chela (with pedicel) 4.00–4.15, chela (without pedicel) 3.84–3.97 times as long as broad, movable finger 1.44–1.69 times as long as hand (without pedicel). Fixed chelal finger with 88–91 pointed teeth, movable finger with 79–82 teeth: 37–38 rounded teeth at base and 42–44 pointed in distal position. ABDOMEN. Tergal chaetotaxy (I–XI): 4: 7–8: 8: 10–11: 10:10: 9–10:11: 9–10: 9–10:11, sternal chaetotaxy (IV–XI): 20–24: 19–21:17–18: 18: 15–18: 13–14: 11–12: 4–5, sternites VI–VIII with two medial glandular setae; genital area (Figs 16F, 17D): sternite II with a total of 21–23 setae and two lyrifissures; sternite III with a row of 30–33 setae and two lyrifissures. LEGS (Figs 16J–K, 17F–G). Leg I: trochanter 1.27–1.28, femur 3.95–4.68, patella 3.47–4.19, tibia 2.72– 4.79, basitarsus 3.27–3.42, telotarsus 4.80–5.22 times as long as deep. Leg IV: trochanter 2.31–2.69, femur +patella 4.21–4.47, tibia 6.43–6.63, basitarsus 3.40–3.62, telotarsus 5.79–7.27 times as long as deep; tibia with two submedial tactile setae (TS=0.44, 0.81–0.84), basitarsus with two tactile setae (TS = 0.43, 0.91–0.94), telotarsus with two tactile setae (TS=0.21, 0.59–0.62). Tritonymphs (paratypes) (Fig. 12C) CARAPACE (Figs 18A, 71B). Carapace 1.08 times as long as broad, with a total of 28–29 setae, including six near anterior margin and six near posterior margin; six lyrifissures near the eyes, five lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes. Carapace smooth. CHELICERA (Fig. 18B). Hand with 5–6 setae and two lyrifissures, movable finger with one seta; fixed finger with 12–14 teeth; movable finger with 6–7 teeth; serrula exterior with 34–39 lamellae; serrula interior with 26–29 lamellae; galea developed, divided into two main branches, one branch secondarily divided into four terminal rami, the other branch secondarily divided into two terminal rami; rallum consisting of seven blades, all with anteriorly directed spinules, the basalmost blade shortest. PEDIPALPS (Fig. 18C–D). Apex of pedipalpal coxa rounded, with four long setae. Femur with some small tubercles in the prolateral position in dorsal view; patella and chelal hand smooth. Trochanter 1.93, femur 4.50–4.81, patella 2.87–3.25, chela (with pedicel) 4.41–4.79, chela (without pedicel) 4.29–4.71 times as long as broad, movable finger 1.53–1.59 times as long as hand (without pedicel). Fixed chelal finger with seven, movable chelal finger with three trichobothria: eb and esb situated basally, grouped very closely with ib; est, et and it grouped distally; ist closer to et -est -it than to eb -esb -ib in fixed chelal finger; b situated 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 70–73 pointed teeth, movable finger with 66–73 teeth: 33–39 rounded teeth at base and 33–34 pointed teeth in distal position. ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 4: 6–9: 8–10: 9–10: 10: 8–10: 9–11: 8–10: 7–10: 8–9: 6–7, sternal chaetotaxy (IV–XI): 16–18:15– 17: 16: 14–17:14–16: 12: 10–11: 4–5, sternites VI–VIII with two medial glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Fig. 18E): anterior genital sternite with 5–6 setae and two lyrifissures; posterior genital sternite with 16–18 setae and two lyrifissures. LEGS (Fig. 18F–G). Leg I: trochanter 1.05, femur 4.06–4.27, patella 3.29–3.38, tibia 3.92–4.27, basitarsus 2.56–2.89, telotarsus 3.50–5.38 times as long as deep. Leg IV: trochanter 2.11–2.29, femur +patella 4.07–4.19, tibia 6.00–6.20, basitarsus 3.45–3.55, telotarsus 5.00–5.45 times as long as

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Zenodo (CERN European Organization for Nuclear Research)
Published
2025-05-26
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https://doi.org/10.5281/zenodo.15555836
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Diatoms and Algae Research
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article

Stenohya cordata Zhao, Guo & Zhang 2025, sp. nov.

Zenodo (CERN European Organization for Nuclear Research)
Diatoms and Algae Research
article

Stenohya cordata Zhao, Guo & Zhang 2025, sp. nov.

article en

Abstract

Stenohya cordata Zhao, Guo & Zhang sp. nov. (爱心狭伪$) urn:lsid:zoobank.org:act: F34EDFB7-AFAF-4137-93D6-63A942B88249 Figs 1.22, 12– 18, 69S, 70P, 71B Diagnosis Male pedipalpal femur with a heart-shaped protuberance medially and a projection on the subterminal prolateral surface (Figs 14I, 15E); pedipalpal patella with a small, triangular-shaped projection on the prolateral face (Figs 14I, 15E); femur, basitarsus and telotarsus of leg I bent, the dividing line between the basitarsus and telotarsus visible (Figs 14J, 15F). Female pedipalpal femur 4.30–4.54 times as long as broad, pedipalpal patella 2.93–3.23 times as long as broad. Etymology The specific epithet is derived from the Latin word ‘ cordatus ’ meaning ‘cordiform’ and ‘heart-shaped’, which refers to the shape of the projections on the male pedipalpal femur on the subterminal prolateral surface; adjective. Type material Holotype CHINA • ♂; Guangxi Zhuang Autonomous Region, Xiufeng District, Reed Flute Scenic Spot; 25°18′34″ N, 110°16′27″ E; 203 m a.s.l.; 15 Jan. 2024; in leaf litter and under rocks (Fig. 2D); Jiaqi Zhao, Jianzhou Sun and Yiting Xu leg.; Ps.- MHBU-GX2024011501. Paratypes CHINA • 3 ♂♂, 2 ♀♀; same collection data as for holotype; Ps.- MHBU-GX2024011502–06 • four tritonymphs; same locality as for holotype; 25°18′24″ N, 110°16′43″ E; 253 m a.s.l.; 1 Dec. 2023; in leaf litter; Jiaqi Zhao, Jianzhou Sun, Tao Zheng and Songtao Shi leg.; Ps.- MHBU-GX2023120101–04. Description Adult males (holotype and male paratypes) (Figs 12A, 13A) CARAPACE (Figs 14A, 15A, 69S). Carapace 1.17–1.22 times as long as broad, with a total of 33 setae, including six near anterior margin and five near posterior margin; eight lyrifissures near the eyes, five lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes. Carapace with slight elevations in the middle of the eye area and the posterior half of carapace in lateral view. CHELICERA (Figs 14B, 15B). Hand with 6–7 setae and two lyrifissures, movable finger with one seta; fixed finger with 14–15 teeth; movable finger with six teeth; serrula exterior with 37–39 lamellae; serrula interior with 35–36 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 (Fig. 14E); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 14C). PEDIPALPS (Figs 14G–I, 15C, E). Apex of pedipalpal coxa rounded, with five long setae. Trochanter with some small granulations, femur with some small tubercles mainly surrounding the basal to median area in the prolateral position, a heart-shaped protuberance medially and a projection on the subterminal prolateral surface (Figs 14I, 15E); patella with a small, triangular projection in the prolateral position (Figs 14I, 15E); chelal hand with 31–34 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 (Figs 14G–H, 15C, E). Trochanter 1.74–1.76, femur 3.83–3.93, patella 3.65–3.84, chela (with pedicel) 5.03–5.16, chela (without pedicel) 4.73–4.95 times as long as broad, movable finger 1.59–1.69 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 93–99 pointed teeth, movable finger with 80–97 teeth: 43–45 rounded teeth at base and 37–52 pointed teeth in distal position. ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 4–5:7: 9–10: 11: 10:10–12: 10–11: 10–14: 12: 11–12: 9–13, sternal chaetotaxy (IV–XI): 24–25:22– 23: 20–21: 18–20:18: 14–15: 12–14: 5–7, sternites VI–VIII with 8–11 medial scattered glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Figs 14F, 15D): anterior genital sternite with 28–31 setae and two lyrifissures; posterior genital sternite with 38–43 setae and two lyrifissures. LEGS (Figs 14J–K, 15F–G). In leg I, femur bent and with a marked enlargement distally, patella enlarged, basitarsus and telotarsus semi-fused and bent, the dividing line between the two segments visible (Figs 14J, 15F). Leg I: trochanter 1.17–1.23, femur 2.52–2.71, patella 4.19–4.43, tibia 4.31– 4.38, basitarsus 3.50–3.92, telotarsus 2.83–3.08 times as long as deep. Leg IV: trochanter 2.18–2.83, femur +patella 4.23–4.29, tibia 3.79–6.83, basitarsus 4.08–4.33, telotarsus 7.00–7.18 times as long as deep; tibia with two submedial tactile setae (TS=0.19, 0.71–0.73), basitarsus with two tactile setae (TS =0.13–0.14, 0.83–0.87), telotarsus with two tactile setae (TS =0.18–0.25, 0.52–0.60); subterminal tarsal seta distally branched (Fig. 14D). Arolium not divided, shorter than the slender and simple claws. Adult females (paratypes) (Figs 12B, 13B) Mostly same as in males, except where noted. CARAPACE (Figs 16A, 17A, 70P). Carapace 1.10 times as long as broad, with a total of 27–33 setae, including six near anterior margin and 5–6 near posterior margin; six lyrifissures near the eyes, two lyrifissures near posterior margin. Carapace with an elevation in the middle of the eye area in lateral view. CHELICERA (Figs 16B, 17B). Fixed finger with 12–15 teeth; movable finger with 7–8 teeth; serrula exterior with 40–41 lamellae; serrula interior with 34–36 lamellae; galea divided into two main branches, one branch secondarily divided into four terminal rami, the other branch secondarily divided into three terminal rami (Fig. 16E); rallum consisting of eight blades, all with anteriorly directed spinules, the basalmost blade shortest (Fig. 16C). PEDIPALPS (Figs 16G–I, 17D–E). Apex of pedipalpal coxa with five long setae. Femur with a few tubercles prolaterally. Trochanter 1.78–1.85, femur 4.30–4.54, patella 2.93–3.23, chela (with pedicel) 4.00–4.15, chela (without pedicel) 3.84–3.97 times as long as broad, movable finger 1.44–1.69 times as long as hand (without pedicel). Fixed chelal finger with 88–91 pointed teeth, movable finger with 79–82 teeth: 37–38 rounded teeth at base and 42–44 pointed in distal position. ABDOMEN. Tergal chaetotaxy (I–XI): 4: 7–8: 8: 10–11: 10:10: 9–10:11: 9–10: 9–10:11, sternal chaetotaxy (IV–XI): 20–24: 19–21:17–18: 18: 15–18: 13–14: 11–12: 4–5, sternites VI–VIII with two medial glandular setae; genital area (Figs 16F, 17D): sternite II with a total of 21–23 setae and two lyrifissures; sternite III with a row of 30–33 setae and two lyrifissures. LEGS (Figs 16J–K, 17F–G). Leg I: trochanter 1.27–1.28, femur 3.95–4.68, patella 3.47–4.19, tibia 2.72– 4.79, basitarsus 3.27–3.42, telotarsus 4.80–5.22 times as long as deep. Leg IV: trochanter 2.31–2.69, femur +patella 4.21–4.47, tibia 6.43–6.63, basitarsus 3.40–3.62, telotarsus 5.79–7.27 times as long as deep; tibia with two submedial tactile setae (TS=0.44, 0.81–0.84), basitarsus with two tactile setae (TS = 0.43, 0.91–0.94), telotarsus with two tactile setae (TS=0.21, 0.59–0.62). Tritonymphs (paratypes) (Fig. 12C) CARAPACE (Figs 18A, 71B). Carapace 1.08 times as long as broad, with a total of 28–29 setae, including six near anterior margin and six near posterior margin; six lyrifissures near the eyes, five lyrifissures near posterior margin; epistome small, triangular, with rounded top; with four corneate eyes. Carapace smooth. CHELICERA (Fig. 18B). Hand with 5–6 setae and two lyrifissures, movable finger with one seta; fixed finger with 12–14 teeth; movable finger with 6–7 teeth; serrula exterior with 34–39 lamellae; serrula interior with 26–29 lamellae; galea developed, divided into two main branches, one branch secondarily divided into four terminal rami, the other branch secondarily divided into two terminal rami; rallum consisting of seven blades, all with anteriorly directed spinules, the basalmost blade shortest. PEDIPALPS (Fig. 18C–D). Apex of pedipalpal coxa rounded, with four long setae. Femur with some small tubercles in the prolateral position in dorsal view; patella and chelal hand smooth. Trochanter 1.93, femur 4.50–4.81, patella 2.87–3.25, chela (with pedicel) 4.41–4.79, chela (without pedicel) 4.29–4.71 times as long as broad, movable finger 1.53–1.59 times as long as hand (without pedicel). Fixed chelal finger with seven, movable chelal finger with three trichobothria: eb and esb situated basally, grouped very closely with ib; est, et and it grouped distally; ist closer to et -est -it than to eb -esb -ib in fixed chelal finger; b situated 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 70–73 pointed teeth, movable finger with 66–73 teeth: 33–39 rounded teeth at base and 33–34 pointed teeth in distal position. ABDOMEN. Pleural membrane granulated. Tergites and sternites undivided, tergal chaetotaxy (I–XI): 4: 6–9: 8–10: 9–10: 10: 8–10: 9–11: 8–10: 7–10: 8–9: 6–7, sternal chaetotaxy (IV–XI): 16–18:15– 17: 16: 14–17:14–16: 12: 10–11: 4–5, sternites VI–VIII with two medial glandular setae, anal cone with two dorsal and two ventral setae. Genital area (Fig. 18E): anterior genital sternite with 5–6 setae and two lyrifissures; posterior genital sternite with 16–18 setae and two lyrifissures. LEGS (Fig. 18F–G). Leg I: trochanter 1.05, femur 4.06–4.27, patella 3.29–3.38, tibia 3.92–4.27, basitarsus 2.56–2.89, telotarsus 3.50–5.38 times as long as deep. Leg IV: trochanter 2.11–2.29, femur +patella 4.07–4.19, tibia 6.00–6.20, basitarsus 3.45–3.55, telotarsus 5.00–5.45 times as long as

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Xinzhou Teachers University (CN), Hebei University (CN)
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Diatoms and Algae Research
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