Callosa baiseensis, Zhao, Qingyuan & Li, Shuqiang, 2017

Zhao, Qingyuan & Li, Shuqiang, 2017, Callosa gen. n., a new troglobitic genus from southwest China (Araneae, Linyphiidae), ZooKeys 703, pp. 109-128 : 109

Callosa baiseensis sp. n. Figs 5, 6, 7, 8, 9

Types.

Holotype ♂: CHINA, Guangxi Zhuang Autonomous Region: Baise City; Longlin County; De’e Town; Yakou Village: 24°39.130'N, 105°09.557'E, ca 1500 m, Da Cave, 14-15.XII.2012, (Z.G. Chen & Z. Zhao). Paratypes: 1♂ 2♀, same data as for holotype; 1♀, Yumigan Cave, 24°39.145'N, 105°09.430'E, ca 1549 m, 14-15.XII.2012, (Z.G. Chen & Z. Zhao).

Etymology.

This specific name is derived from Chinese Pinyin 'bǎi sè’ (), referring to its type locality; adjective.

Diagnosis.

Non-indented apex of distal suprategular apophysis (Fig. 5D), and the broad tip of convector ventral process in male palp (Figs 5B, 6B); it differs from the type species C. ciliata sp. n. by the relatively longer parmula (Figs 7B, 8C) and wider atrium (Fig. 7C).

Description.

Male (holotype). Total length: 2.60. Carapace 1.20 long, 1.00 wide, beige, ocular area brownish yellow (Fig. 6C), AME completely lost, ALE, PLE and PME strongly reduced (Fig. 6C, E). Sternum 0.68 long, 0.66 wide. Clypeus 0.44 high. Eye sizes: ALE 0.03, PME 0.02, PLE 0.04. Leg length: I 9.25 (2.50, 0.38, 2.80, 2.41, 1.16), II 8.27 (2.28, 0.38, 2.38, 2.23, 1.00), III 6.33 (1.84, 0.40, 1.68, 1.56, 0.85), IV 8.05 (2.38, 0.38, 2.33, 2.03, 0.93). TmI 0.16. Abdomen pale, with dark yellow markings (Fig. 6 C–E). Male palp: protegulum medially expanded, then attenuated at tip (Fig. 5B); distal suprategular apophysis with a small, hooked apex (Fig. 5D); embolus coiling from 8 o’clock position in prolateral view (Fig. 5C).

Female. Total length: 2.50. Carapace 1.19 long, 0.94 wide, same coloration as in male. Sternum 0.55 long, 0.63 wide. Clypeus 0.34 high. Eye sizes: ALE 0.05, PME 0.04, PLE 0.05. Leg length I 8.91 (2.48, 0.40, 2.56, 2.34, 1.13), II 8.30 (2.28, 0.40, 2.34, 2.19, 1.09), III 6.29 (1.88, 0.38, 1.63, 1.59, 0.81), IV 7.91 (2.30, 0.38, 2.15, 2.08, 1.00). TmI 0.18. Abdomen with same coloration as in male (Fig. 7 D–E). Epigyne : atrium nearly semicircular, partitioned by a septum along the long axis (Fig. 8 C–D); copulatory furrows forming 2 coils; receptacles oval separated by 2 diameters, with curved outgrowths (Fig. 7 C–D).

Remarks.

To confirm the species delimitation, the p-distance of COI sequences of C. baiseensis sp. n. and C. ciliata sp. n. was calculated using MEGA 6 ( Tamura et al. 2013), and the result is 0.12, which falls within the genetic distance interval of 0.07 to 0.16 among Bathyphantes species and 0.07 to 0.17 in Porrhomma based on data from NCBI (The National Center for Biotechnology Information https://www.ncbi.nlm.nih.gov/).