Tapinocyba denticulata, Irfan & Yun & Lu-Yu & Zhi-Sheng, 2024

Irfan, Muhammad, Yun, Dai, Lu-Yu, Wang & Zhi-Sheng, Zhang, 2024, Four new species of Tapinocyba Simon, 1884 (Araneae, Linyphiidae) from Jiangjin District of Chongqing, China, ZooKeys 1219, pp. 195-214 : 195-214

publication ID	https://doi.org/ 10.3897/zookeys.1219.133899
publication LSID	lsid:zoobank.org:pub:40631DBF-34FF-4C81-A6A4-8C940FBA1E69
DOI	https://doi.org/10.5281/zenodo.14269239
persistent identifier	https://treatment.plazi.org/id/E31CE1AD-2378-5A71-A288-4C96933ED134
treatment provided by	ZooKeys by Pensoft
scientific name	Tapinocyba denticulata
status	sp. nov.

Treatment

Tapinocyba denticulata sp. nov.

Figs 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5 , 12 View Figure 12

Type material.

Holotype: China • ♂; Chongqing Municipality, Jiangjin District, Simian Mountain, Zhengtian Valley , 28°36′46.97″N, 106°25′54.77″E, 1170 m a. s. l., 2023. III. 02, Wang L. Y. et al. leg.; SWUC -T-LIN-27-01 GoogleMaps . Paratypes: 1 ♀; same location data as holotype; SWUC -T-LIN-27-02 GoogleMaps • 1 ♀: Simian Mountain, Chaoyuanguan , 28°38′53.38″N, 106°20′23.84″E, 920 m a. s. l., 2023. I. 22, Wang B. et al. leg.; SWUC -T-LIN-27-03 GoogleMaps • 1 ♂; Simian Mountain, Qinjiagou , 28°37′6.32″N, 106°23′53.40″E, 1131 m a. s. l., 2023. III. 2, Zhang Z. G. et al. leg.; SWUC -T-LIN-27-04 GoogleMaps .

Etymology.

The specific epithet is derived from the Latin adjective denticulatus, meaning “ teeth ” and referring to the small teeth at the tip of dorsal tibial apophysis of the male palp.

Diagnosis.

The male of Tapinocyba denticulata sp. nov. resembles T. praecox (O. Pickard-Cambridge, 1873) in having the similar embolic division (Fig. 3 A – D View Figure 3 ; Hormiga 2000: fig. 27 A – E, pl. 62 A – F) and can be distinguished by the ocular region strongly curved, making right-angle with cephalothorax, extending above the clypeus in T. denticulata sp. nov. (Fig. 5 B View Figure 5 ; vs ocular region not modified); dorsal tibial apophysis as long as cymbium, tip with small teeth, extending above the cymbium in T. denticulata sp. nov. (Fig. 3 C View Figure 3 ; vs half the length of tibia, with blunt tip, extending away from cymbium); retrolateral tibial apophysis present in T. denticulata sp. nov. (Fig. 3 C View Figure 3 ; vs absent); embolus curved clockwise with bifurcated tip in T. denticulata sp. nov. (Fig. 3 A, B, E View Figure 3 ; vs slightly curved with blunt tip). The female of T. denticulata sp. nov. resembles T. affinis Lessert, 1907 in having the similar copulatory ducts and spermathecae (Fig. 4 A – E View Figure 4 ; Wiehle 1960: figs 984 a, b, 985) and can be distinguished by the tapering part of ventral plate as long as wide in T. denticulata sp. nov. (Fig. 4 A, B, E View Figure 4 ; vs somewhat triangular). The epigyne of Tapinocyba denticulata sp. nov. can be distinguished from T. praecox by the dorsal plate ventrally grooved in T. denticulata sp. nov. (Fig. 4 A – C View Figure 4 ; vs not grooved).

Description.

Male (holotype, Fig. 5 A – C View Figure 5 ): total length 1.74; carapace 0.87 long, 0.60 wide, brown, cephalic region slightly elevated, cephalic pits absent, fovea, cervical and radial grooves distinct. Clypeus 0.20 high. Chelicerae with five promarginal and five retromarginal teeth. Sternum yellowish brown, as long as wide, shield-like, with microsetae. Ocular region strongly curved, extending above clypeus, eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.04, PLE 0.05, AME – AME 0.02, PME – PME 0.07, AME – ALE, 0.02, PME – PLE 0.03, AME – PME 0.06, ALE – ALE 0.19, PLE – PLE 0.20, ALE – PLE contiguous. Length of legs: I 1.97 (0.59, 0.21, 0.48, 0.36, 0.33), II 1.82 (0.56, 0.19, 0.43, 0.35, 0.29), III 1.68 (0.58, 0.15, 0.45, 0.28, 0.22), IV 2.00 (0.58, 0.19, 0.48, 0.38, 0.39). TmI 0.63 and TmIV absent. Tibial spine formula: 1-1 - 1 - 1. Opisthosoma 0.97 long, 0.71 wide, oval, greenish.

Palp (Fig. 3 A – D View Figure 3 ). Femur unmodified, almost as long as both patella and tibia. Patella as long as tibia. Tibia widest at distal end, with one retrolateral and one dorsal trichobothria, with three apophyses; dorsal tibial apophysis almost as long as cymbium, slightly curved, tip with teeth; prolateral tibial apophysis (PTA) small, somewhat triangular in dorsal view; retrolateral tibial apophysis sclerotized, tip with serrated margin; paracymbium J-shaped, basally with setae, distal arm tip with blunt end; tegulum almost round, ventrally bulging above the subtegulum, protegulum distinct, membranous; suprategulum small, with small median suprategular apophysis, distal suprategular apophysis membranous; embolic division simple, consisting of a radix longer than wide; tailpiece slightly curved with blunt tip; median membrane short, present in between embolus and distal suprategular apophysis; embolus curved, with bifurcated tip.

Female (paratype SWUC -T-LIN-27-02 , Fig. 5 D, E View Figure 5 ): total length 1.64; carapace 0.76 long, 0.51 wide, cephalic region slightly elevated, brown, fovea, cervical and radial grooves distinct. Clypeus 0.11 high. Chelicerae with six promarginal and five retromarginal teeth. Sternum shield-shaped, as wide as long, greenish brown, with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.04, ALE 0.06, PME 0.04, PLE 0.05, AME – AME 0.01, PME – PME 0.04, AME – ALE, 0.01, PME – PLE 0.02, AME – PME 0.05, ALE – ALE 0.21, PLE – PLE 0.23, ALE – PLE contiguous. Length of legs: I 1.73 (0.40. 53, 0.20, 0.42, 0.30, 0.28), II 1.59 (0.50, 0.19, 0.35, 0.29, 0.26), III 1.32 (0.39, 0.16, 0.28, 0.27, 0.22), IV 1.74 (0.53, 0.16, 0.42, 0.34, 0.29). TmI 0.64 and TmIV absent. Tibial spine formula: 1-1 - 1 - 1. Opisthosoma 0.96 long, 0.64 wide, oval, greenish.

Epigyne (Fig. 4 A – E View Figure 4 ). Epigynal plate twice as wide as long, anteriorly with round patch; ventral plate tapering ventrally; dorsal plate almost rectangular, with small groove at the center; copulatory opening located mid-ventrally at the junction of dorsal and ventral plates; copulatory ducts large, curving into one loop; spermathecae large and kidney-shaped, located anterior to the epigynal transverse slit, spaced by two diameters; fertilization ducts large and sinuous.

Distribution.

Known only from the type locality (Fig. 12 View Figure 12 ).