Raveniola gracilis, 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 : 8-9

Taxon classification Animalia Araneae Nemesiidae

Raveniola gracilis sp. n. Figs 9, 10

Type material.

Holotype ♂ - CHINA: Zhejiang Province, Hangzhou County, Hangzhou [30°16.276'N, 120°09.178'E, 260 m], July 1980, Z. Chen (IZCAS).

Etymology.

The specific name is taken from the Latin adjective “gracilis”, which means “slender” and refers to the shape of embolus.

Diagnosis.

This new species can be easily distinguished from all known congeners by its slender and subapically curved embolus (Figs 9 A–C, 10 A–C).

Description.

Male (holotype): TL 8.30, CL 4.05, CW 3.25, AL 3.90, AW 2.40. Eye sizes and interdistances: AME 0.15, ALE 0.22, PME 0.11, PLE 0.15, AME–AME 0.11, AME–ALE 0.07, PME–PME 0.34, PME–PLE 0.04. Leg lengths: I: 11.90 (3.50+1.55+2.95+2.15+1.75), II: 11.00 (3.05+1.60+2.70+1.80+1.85), III: 10.75 (2.75+1.60+2.25+2.25+1.60), IV: 12.85 (3.25+1.60+3.15+3.10+1.75). Carapace yellowish brown dorsally, with a few brownish setae. Eye tubercle blackish brown. Chelicerae reddish dark brown. Sternum, labium, maxillae and legs light brown ventrally. Abdomen dorsally light brown, with blackish cloudy maculae and brownish setae. Ventral surface of abdomen and spinnerets yellowish brown, with dense brownish setae (Fig. 9D, G). Fovea broad, slightly recurved (Fig. 9D). Chelicerae without rastellum but with strong setae (Fig. 9D, G). Maxillae with 7-9 cuspules. Three pairs of cloudy sternal sigilla (Fig. 9G). Leg tarsi without spines. Tarsal claws with two rows of uniform teeth. Metatarsus I curved and bent (Fig. 9E). Two pairs of spinnerets, apical segment of PLS digitiform. Tip of cymbium with 5 strong spines. Bulb smooth, pyriform, with long, slender embolus (Figs 9 A–C, 10 A–C).

Female. Unknown.

Distribution.

The species is known only from the type locality.