Sinartoria Wang & Framenau & Zhang 2021, gen. nov.

Sinartoria gen. nov.

Type species. Sinartoria damingshanensis sp. nov.

Etymology. The generic name is a compound noun derived from the Latin sinae (= the Chinese) and the genusgroup name Artoria, feminine in gender.

Diagnosis. The new genus is similar to Lobizon Piacentini & Grismado, 2009 in having a long embolus resting in a groove of a broad terminal apophysis, but differs from the latter by the sclerotized basoembolic apophysis (weakly sclerotized and lamellar in Lobizon), the presence of membranous terminal apophysis 1 (TA1) and sclerotized, groove-like terminal apophysis 2 (TA2) (TA2 only in Lobizon), and three arms (AA, RA, PA) present in the median apophysis of male pedipalp (Figs 1A–C, 2D–H, 3, 4D–E). Females can be recognized by the spermatheca that has a compact stalk and a small, protruding head (Figs 1E, 2J, stalk sinuous in Lobizon).

Description. Carapace yellowish brown (Figs 2A–B, 4A–B). Eye region black, with sparse white setae (Figs 4B). Chelicerae yellowish brown, with three promarginal and two retromarginal teeth. Labium and endites yellowish brown, longer than wide. Sternum yellowish brown, heart-shaped, with sparse brown setae. Legs yellowish brown, with brown ring-like stripes. Opisthosoma oval. Dorsum yellowish brown, with lanceolate cardiac mark in anterior half and black irregular markings extending posteriorly. Dorsal patch of white setae present near the anal tubercle of males (Figs 2C, 4C). Venter of opisthosoma yellow, with short, yellow spinnerets.

Male pedipalp. Median apophysis with three arms: fingernail-like anterior arm (AA), finger-like posterior arm (PA) and knife-like retrolateral arm (RA) (Figs 1A – B, 2D – G, 3, 4D – E). Embolus long and slender, its anterior part resting in a long groove of a large and complex terminal apophysis (Figs 1C, 2H). Terminal apophysis with two arms, one of them membranous (TA1), as the functional conductor (Piacentini & Grismado 2009), the other one sclerotized and groove-like (TA2, Figs 1C, 2H).

Epigyne. Copulatory openings arc-shaped. Septum broad, posteriorly projected (Figs 1D, 2I). Spermathecae rounded, with spermathecal head. Spermathecal stalk compact and sclerotized. Spermathecal head small, with round end. Fertilization ducts form crescents (Figs 1E, 2J).

Composition. Two new species: S. damingshanensis sp. nov. and S. zhuangius sp. nov.

Distribution. China (Guangxi Zhuang Autonomous Region, Fig. 11).