Uroballus and Ptocasius have triangular abdomen ending in a point.

Family: Salticidae
Subfamily: Plexippinae
Tribe: Plexippini

Genus: Ptocasius

毛垛兜跳蛛Ptocasius

Family: Salticidae
Subfamily: Plexippinae
Tribe: Plexippini

Genus: Ptocasius

Ptocasius genus belong to Salticidae family (jumping spiders).

There are 12 Species
Ptocasius fulvonitens Simon, 1902 — Sri Lanka
Ptocasius gratiosus Peckham & Peckham, 1907 — Singapore
Ptocasius kinhi Zabka, 1985 — China, Vietnam
Ptocasius linzhiensis Hu, 2001 — China
Ptocasius montiformis Song, 1991 — China
Ptocasius plumipalpis (Thorell, 1895) — Myanmar
Ptocasius songi Logunov, 1995 — China
Ptocasius strupifer Simon, 1901 — China, Hong Kong, Taiwan, Vietnam
Ptocasius variegatus Logunov, 1995 — Kazakhstan
Ptocasius vittatus Song, 1991 — China
Ptocasius weyersi Simon, 1885 — Sumatra
Ptocasius yunnanensis Song, 1991 — China