Oxytate bicornis, Xu, Xiang, 2017

Xu, Xiang, 2017, Two new species of the genus Oxytate from China (Araneae: Thomisidae), Zootaxa 4320 (1), pp. 193-200 : 194

Oxytate bicornis sp. nov.

Figs 1 , 2

Material examined: Holotype: male, CHINA: Jiangxi Province: Jinggangshan County Level City , Ciping Town , Dajing Village , General of forest, 26.566°N, 114.125°E, 922 m, 13 July 2014, Keke Liu, Zhiwu Chen, Sha Wu, Ce Xu, Shicong He and Yifan Zhao (ASM-JGSU).

Etymology: The specific name is a Latin adjective, referring to the two strong horn-like tips in retrolateral tibial apophysis (RTA) of the male palp.

Diagnosis: Males of the new species resemble Oxytate bhutanica Ono, 2001 , O. capitulata Tang & Li, 2009 , O. subvirens ( Strand, 1907) and O. taprobane Benjamin, 2001 in the developed retrolateral tibial apophysis (RTA), but can be clearly distinguished by two strong horn-like tips in RTA and the spine-like embolus ( Figs 1B–D , 2 ).

Description. Male ( Figs 1 , 2 ). Total length 6.37. Prosoma 2.80 long, 2.78 wide; opisthosoma 4.94 long, 1.38 wide. Eyes: circular, lateral eyes on tubercles; diameters: AME 0.10, ALE 0.11, PME 0.10, PLE 0.11; AME–AME 0.26, AME–ALE 0.22, PME–PME 0.24, PME–PLE 0.40; MOA, length 0.20, slight wider in front than in back (0.26, 0.24). Carapace yellow brown ( Fig. 1A ), with inconspicuous cervical groove and fovea. Eye field, arcshaped ( Fig. 1A ), with 4–6 setae. Chelicerae yellowish brown, without tooth. Edites yellowish brown, smooth, longer than wide, with short, sparse setae. Labium yellowish brown, fan-shaped. Measurements of legs: I 12.50 (3.85, 1.11, 3.42, 2.63, 1.49); II 12.03 (3.67 1.09, 3.45, 2.36, 1.19); III 6.25 (1.85, 0.70, 1.79, 1.22, 0.69); IV 6.17 (1.92, 0.55, 1.85, 1.11, 0.74). Leg formula: I, II, III, IV. Leg spination: I Fe 3103, Pa 2100, Ti 2228, Mt 2224; II Fe 4210, Pa 2100, Ti 2336, Mt 0224; III Fe 4110, Pa 2110, Ti 2221, Mt 0111; IV Fe 4110, Pa 2110, Ti 2224, Mt 0 222. Abdomen much longer than wide ( Fig. 1A ), dorsum yellowish white, with a longitudinal median strip in anterior part and regular transverse rows of strong spines on posterior part. Spinnerets yellow-brown, stout, with abundant setae. Palp ( Figs 1B ̄D, 2). Palp with two strong horn-like tips in retrolateral tibial apophysis (RTA): one curved backwards, the other curved forwards, with many regular fine ridges (RI). Embolus (EM), strongly sclerotized, with a spine-like tip. Sperm ducts, obvious and long.

Female: Unknown.

Figures

FIGURES 1 A ‒ D. Oxytate bicornis sp. nov., male holotype. A Habitus, dorsal; B ̅ D Palp (B prolateral-ventral, C prolateral, D retrolateral). Scale bars: A, 1 mm; B ̅ D, 0.2 mm.

FIGURES 2 A ‒ C. Oxytate bicornis sp. nov., SEMs of male holotype. A ̅ B Palp (A prolateral-ventral, B retrolateral); C RTA retrolateral, showing the fine ridges on tip. Abbreviations: EM, embolus; RI, ridge; RTA, retrolateral tibial apophysis. Scale bars: A, B, 0.1 mm; C, 10 µm.