Mengmena Lin & Li gen. nov.

Type species.

Mengmena banna Lin & Li, sp. nov.

Etymology.

The generic name is a combination of the first four letters of Menglun (type locality of type species) and the latter half of Mysmena . The gender is feminine.

Diagnosis.

The Mengmena gen. nov. can be easy distinguished from other mysmenids, except Mysmeniola Thaler, 1995, by lacking anterior median eyes in both sexes (Figs 3A, D, 6A). It resembles Mysmeniola in having six eyes (anterior median eyes absent), a submesial mating clasper on metatarsus I of males, and a long filiform embolus extending to the distal tip of the cymbium, but differs from Mysmeniola in lacking a cluster of strong spines at the base of the male clypeus ( Mysmeniola, Thaler 1995: figs 1, 2), and lacking a prolateral apical process on male palpal tibia (Thaler 1995: fig. 5). In addition, the male can be distinguished from other mysmenids by the complex structure of the apical part of cymbium (Figs 5A-C). The cymbium tip specialized as a triangular cymbial conductor (Figs 4A-B, 5A-C), and the retrolateral base of cymbial conductor present a distal lobe (Figs 4B, 5A), the cymbial fold originated from the base of cymbial conductor and the cymbial fold distal end extended anteriorly form a scleroticed cymbial process (Figs 4D, 5A-C); the absence of cymbial spur (or cymbial tooth) and paracymbium (Figs 4A-D, 5C). The female can be distinguished by the widely separated spermathecae (at least 4 × their width, 2-3 × in other mysmenids), and copulatory opening situated at the union of copulatory ducts (Figs 3H, I, 6E, F).

Description.

Body bicolour, dorsally grey, ventrally yellow or pale yellow (Figs 3A-F, 6A, B). Anterior median eyes absent (Figs 3A, 3D, 6A). Abdomen without posterior tubercle (Figs 3A-D, 6A-C). Male cephalic area moderately elevated, tibia I without prolateral macrosetae (Fig. 3C). Femoral spots present on leg I of the males and legs I-II of the females (Figs 3B, 3E, 6B).

Male palp: cymbium oriented ventrally on the palp (Fig. 4A, B). Cymbial spur and paracymbium absent (Figs 4A-D, 5C). Cymbial process arising from the cymbial fold at apex, strongly sclerotized (Figs 4D, 5A-C). Cymbial conductor wide (Fig. 5A-C). Cymbial fold long and sclerotized, from the base of cymbial conductor (Fig. 5C). Distal lobe on retrolateral tip of cymbium (Fig. 4A, B). Embolus threadlike, coiled with at least two loops (Figs 4A-D, 5D-E).

Epigyne: weakly sclerotized (Figs 3G, 6D). Scape absent (Figs 3G-I, 6D-F). Spermathecae ovate or slightly twisted, separated by at least four times their width. Copulatory ducts wide, shape convoluted. Copulatory opening small hole-shaped or arc shape, situated at the union of copulatory ducts (Figs 3H, I, 6E, F).

Composition.

Mengmena banna sp. nov. and M. yulin sp. nov.

Distribution.

China (Yunnan).