Raveniola spirula, 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 : 11-12

Taxon classification Animalia Araneae Nemesiidae

Raveniola spirula sp. n. Figs 15, 16

Type material.

Holotype ♂ - CHINA: Hubei Province, Shennongjia Forest Region, Mt. Guanmenshan [31°25.483'N, 110°21.565'E, elevation 1601 m], July 23-30, 1998, H. Zhou (IZCAS). Paratypes: 22♂ (IZCAS), same data as holotype.

Etymology.

The specific name is taken from the Latin noun “spirula” (the diminutive form of "spira = spiral"), which means "small spiral" and refers to the spiral embolus.

Diagnosis.

The new species is similar to Raveniola yunnanensis but can be distinguished by a noticeably longer and less spinose cymbium, by its more twisted, corkscrew-shaped distal portion of the embolus (see Fig. 16 A–C and Zonstein and Marusik 2012: figs 35, 43) and by the absence of PMS (present in the latter species).

Description.

Male (holotype): TL 11.25, CL 3.95, CW 3.50, AL 5.65, AW 2.25. Eye diameters and interdistances: AME 0.11, ALE 0.26, PME 0.09, PLE 0.10, AME–AME 0.08, AME–ALE 0.05, PME–PME 0.28, PME–PLE 0.04. Leg lengths: I: 11.65 (3.25+1.45+3.10+2.30+1.55), II: 10.55 (3.10+1.25+2.55+2.15+1.50), III: 9.65 (2.55+1.05+2.05+2.55+1.75), IV: 13.55 (3.35+1.30+2.75+4.10+2.05). Venter as shown in Fig. 15G. Maxillae with 5 cuspules. Prosoma, palps and legs light brown. Abdomen including spinnerets light grey. Metatarsus I curved outwards (retrolaterally) as in Fig. 15E. PMS absent, apical segment of PLS digitiform (Fig. 15D, G). Palpal tibia long, subcylindrical; cymbium with five short, stout spines; bulb pyriform; embolus strongly twisted, corkscrew-shaped. (Figs 15 A–C, 16 A–C).

Female. Unknown.

Variation.

Total length: 10.46-11.56 (n=8).

Distribution.

Known only from the type locality.