Raveniola chayi, Li, Shuqiang & Zonstein, Sergei, 2015

Li, Shuqiang & Zonstein, Sergei, 2015, Eight new species of the spider genera Raveniola and Sinopesa from China and Vietnam (Araneae, Nemesiidae), ZooKeys 519, pp. 1-32 : 7

Taxon classification Animalia Araneae Nemesiidae

Raveniola chayi sp. n. Figs 6, 7, 8

Type material.

Holotype ♂ - CHINA: Yunnan Province, Lijiang County, Mt. Yulongxueshan, Maoniuping [27°05.503'N, 100°15.403'E, elevation 3061 m], August 1-3, 2000, X. Yu (IZCAS). Paratypes: 16♂ (IZCAS), same data as holotype; 1♀ - Sichuan Province, Yanyuan County, around Lugu Lake [27°48'N, 100°49'E, elevation 3300 m], May 28, 2011, J. Martens (SMF).

Etymology.

The specific name is from the Chinese word for difference ( chā yì), in reference to the difference between the new species with Raveniola songi and Raveniola yunnanensis ; noun.

Diagnosis.

The new species is similar to Raveniola alpina sp. n., Raveniola songi and Raveniola yunnanensis but can be distinguished by the smooth distal portion of the embolus (Figs 6 A–C, 7 A–C), the presence of 4 spines on the cymbium (Figs 6 A–C, 7 A–C) and the presence of ridges on the proximal portion of the embolus (Figs 6 A–C, 7 A–C); it can be distinguished from latter two congeners by lacking the PMS (present in those species).

Description.

Male (holotype): TL 10.30, CL 4.30, CW 3.65, AL 4.90, AW 3.10. Eye diameters and interdistances: AME 0.17, ALE 0.23, PME 0.13, PLE 0.21; AME–AME 0.11, AME–ALE 0.06, PME–PME 0.31, PME–PLE 0.05. Leg lengths: I: 12.50 (3.60+1.25+2.95+2.45+2.25), II: 11.65 (3.55+1.25+2.85+2.50+1.50), III: 10.55 (2.55+1.10+2.50+2.65+1.75), IV: 14.40 (4.00+1.30+3.10+4.05+1.95). Maxillae, labium and sternum as shown in Fig. 6G. Maxillae with 12-15 cuspules. Prosoma, palps and legs light brown. Spinnerets light grey, abdomen brown with light dorsal and ventral spots (Fig. 6D, G). Metatarsus I noticeably curved (Fig. 6E). PMS absent; apical segment of PLS digitiform (Fig. 6D, G). Palpal tibia long, subcylindrical; cymbium with four short, stout spines; bulb long, pyriform; embolus gradually tapering to a slender point (Figs 6 A–C, 7 A–C).

Female (paratype): TL 14.75, CL 5.75, CW 4.90, AL 9.00, AW 5.25. Eye diameters and interdistances: AME 0.17, ALE 0.30, PME 0.17, PLE 0.23, AME–AME 0.21, AME–ALE 0.12, PME–PME 0.47, PME–PLE 0.04. Leg lengths: I: 13.15 (4.20+2.25+3.00+2.30+1.40), II: 11.95 (3.70+2.20+2.35+2.30+1.40), III: 11.90 (3.15+2.00+2.05+3.05+1.65), IV: 15.90 (4.25+2.30+3.10+4.30+1.95). Most characters, including the colouration peculiarities (Fig. 8A) and the absence of PMS, are as in the male. Receptacles divided into a stocking-shaped inner branch and a clubbed outer branch; both branches long and crimped (Fig. 8 B–C).

Variation.

Total length of males: 9.49-11.10 (n=8).

Distribution.

China: north-western Yunnan, south-western Sichuan.