PIMOIDAE WUNDERLICH, 1986

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 : 267-268

PIMOIDAE WUNDERLICH, 1986

Pimoinae. Wunderlich (1986: 16)

Pimoidae . Hormiga (1993), type genus by monotypy Pimoa Chamberlin and Ivie.

Diagnosis

Male palpus with a retrolateral cymbial sclerite, a dorsoectal cymbial process, and cuspules on either the cymbial process ( Pimoa ; Hormiga 1994a: figs 11, 68) or the dorsal surface of the cymbium ( Weintrauboa ; Fig. 1E , 5E ). Conductor and median apophysis present in most species. Embolus continuous with the tegulum (the typical linyphiid embolic division is absent), with an embolic process of varying morphology. The epigynum is protruding, with a dorsal to lateral fold or groove with the copulatory opening at the distal end ( Hormiga, 1994a: figs 14, 414; Fig. 3A ); fertilization ducts are anteriorly ( Pimoa ) or mesally ( Weintrauboa ) orientated. As in linyphiids, pimoids have stridulatory striae on the ectal side of the chelicerae (but the striae are absent in Weintrauboa ), build sheet-webs and exhibit autospasy at the patella-tibia junction.

Description

See Hormiga (1994a) for family description.

Phylogenetics

The monophyly of Pimoidae is supported by the following four unambiguous putative synapomorphies: a dorsoectal cymbial process, cymbial cuspules, a retrolateral cymbial sclerite (PCS) and the embolic process (PEP).

Composition

Two genera, Pimoa Chamberlin & Ivie and Weintrauboa new genus.

Figures

Figure 1. Weintrauboa contortipes (Karsch) n. comb., male palp. A–F, from Doi, Sakuto-Cho, Okayama Pref., Japan; E–J, from Japan (MNHN 3837), partially expanded. A, ventral; B, caudoectal; C, ectal; D, mesal; E, dorsal; F, cymbium, apical; G, apical; H–J, details of tegular division. Scale bars, 0.5 mm.

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 5. Weintrauboa contortipes (Karsch). A, paracymbium, ectal; B, tegular division, ectal; C, tegular division, detail; D, cymbial process; E, cymbial cuspules; F, male PLS.