Weintrauboa, Hormiga, 2003

Hormiga, Gustavo, 2003, Weintrauboa, a new genus of pimoid spiders from Japan and adjacent islands, with comments on the monophyly and diagnosis of the family Pimoidae and the genus Pimoa (Araneoidea, Araneae), Zoological Journal of the Linnean Society 139 (2), pp. 261-281 : 269-272

WEINTRAUBOA NEW GENUS

Type species: Linyphia contortipes Karsch, 1881

Etymology

Named after Professor Dr Robert L. Weintraub (1912– 1996), benefactor of the systematics programme at The George Washington University. Weintrauboa is an undeclinable proper name and masculine in gender .

Diagnosis

Weintrauboa differs from Pimoa by the following combination of characters: male palpal tibia lacking dorsal process; distal end of cymbium finger-like; dorsoectal cymbial process heavily sclerotized and without cuspules; cuspules arranged in rows, on dorsal surface of the cymbium; absence of an alveolar sclerite on the ventral side of the cymbium; a small elongated membrane, the embolic flap, arising from the area where the embolic process ( PEP) connects to the embolus; PEP embolic process compact (filiform or lamelliform in Pimoa ), of varying morphology; enlarged and sinuous metatarsal I base in males; cheliceral stridulatory striae absent; fertilization ducts mesally orientated; and PMS with at least two and PLS with at least five aciniform spigots.

Description

Small- to medium-sized pimoid spiders, total length 4.9–6.0 in males and 4.7–8.0 in females. Carapace longer than wide, 2.2–2.9 long in males and 2.1–3.1 in females, with a conspicuous thoracic fovea ( Fig. 4 ). Colour photographs of Weintrauboa contortipes (Karsch) and W. chikunii (Oi) are published in Chikuni (1989: figs 11, 12) and Shinkai & Takano (1984: 27). Sternum longer than wide, pointed in the posterior region, slightly projecting between coxae IV ( Fig. 3E ). AME very close together ( Fig. 3F ), c. 0.17–0.29 their diameter apart, larger than the rest, which are roughly of the same diameter; ALE and PLE juxta-

Figures

Figure 3. Weintrauboa contortipes (Karsch) n. comb. (A–H), W. chikunii (Oi) n. comb. (I,J). A, epigynum (cleared), dorsal; B, epigynum (cleared), ventral; C, epigynum (cleared), dorsal (schematic); D, prosoma, dorsal; E, prosoma, ventral; F, prosoma, anterior; G, male first leg, lateral; H, male first metatarsus, dorsal; I, male first leg, lateral; J, male first metatarsus, dorsal. Scale bars, 0.1 mm (A–C), 0.5 (D–F, H,J), 1.0 (G,I).

Figure 4. Weintrauboa contortipes (Karsch). Male (A) and female (B) from Doi, Sakuto-Cho, Okayama Pref. (Japan). Carapace width 2.15 (male), 2.25 (female).