Pimoa Chamberlin & Ivie, 1943

Xu, Hao, Zhang, Xiaoqing, Yao, Zhiyuan, Ali, Abid & Li, Shuqiang, 2021, Thirty-five new species of the spider genus Pimoa (Araneae, Pimoidae) from Pan-Himalaya, ZooKeys 1029, pp. 1-92 : 1

Genus Pimoa Chamberlin & Ivie, 1943

Pimoa : Chamberlin and Ivie 1943: 9; Hormiga 1994a: 4; Hormiga and Lew 2014: 1; Mammola et al. 2016: 1.

Type species.

Labulla hespera Gertsch & Ivie, 1936, from California, USA.

Diagnosis.

Pimoa is larger in size than other genera occurring in the region, 4.0-12.0 mm. The chelicerae of most species of Pimoa (including the type species) have three promarginal and three retromarginal teeth. Males of Pimoa can be distinguished from Nanoa by the small median apophysis and the elongate cymbial denticulate process with many cuspules (vs. the large median apophysis and short cymbial process only with one strong cuspule). (Fig. 1A, B ; Hormiga 2005: figs 1, 2), from Putaoa by the slender embolus and the absence of distinctly large macrosetae on the palpal tibia (vs. the thick embolus and many robust macrosetae on the pedipalpal tibia) (Fig. 1A, B ; Hormiga and Tu 2008: figs 3, 5, 6), and from Weintrauboa by the clockwise pimoid embolic process and the absence of an embolic flap (vs. counterclockwise pimoid embolic process and a membranous embolic flap arising from the embolus) (Fig. 1A, B ; Hormiga 2003: figs 1, 2). Females of Pimoa can be distinguished from Nanoa the absence of a ventral scape-like septum (vs. epigynum with a distinct septum) (Fig. 2A ; Hormiga 2005: figs 3, 5), from Putaoa by the protruding epigynum and the absence of lateral openings on the epigyne (vs. relatively flat epigynum with two lateral openings) (Fig. 2A-D ; Hormiga and Tu 2008: figs 2, 4, 8), and from Weintrauboa by the epigyne with a distinct groove at the margin of the dorsal plate (vs. dorsal plate absent) (Fig. 2A-D ; Hormiga 2003: figs 2, 3).

Composition.

Seventy-six valid species of Pimoa are currently known from Asia (58), Europe (4) and North America (14) ( WSC 2021).

Figures

Figure 1. Left palp of Pimoa anning sp. nov., holotype A prolateral view B retrolateral view. Abbreviations: C = conductor; CDP = cymbial denticulate process; E = embolus; MA = median apophysis; P = paracymbium; PCS = pimoid cymbial sclerite; PEP = pimoid embolic process; T = tegulum. Scale bar: equal for A, B.

Figure 2. Epigyne and habitus of Pimoa anning sp. nov., female paratype and male holotype A epigyne, ventral view B vulva, dorsal view C schematic course of internal duct system, ventral view D schematic course of internal duct system, dorsal view E male habitus, dorsal view F female habitus, dorsal view G female habitus, ventral view. Abbreviations: CO = copulatory opening; DP = dorsal plate of the epigyne; FD = fertilization duct; S = spermatheca; VP = ventral plate of epigyne. Scale bars: equal for F, G.