About Phycosoma digitula F.Zhang & B.S.Zhang, 2012
Phycosoma digitula, first formally described by F. Zhang and B. S. Zhang in 2012. In males of this species, total body length ranges from 3.05 to 3.15 mm. The male carapace is 1.49 mm long and 1.22 mm wide; it is yellowish overall, with a yellow-brown central region and a distinct black cervical groove. Each individual eye is surrounded by a black ring. Males can be distinguished from all other Phycosoma species by their wide apical cymbium, the boat-shaped structure located at the tip of the pedipalp. Females are separated from closely related Phycosoma species including P. flavomarginatum, P. hainanensis, and P. hana by their own distinct features: a wide, U-shaped scapus and long copulatory ducts. The legs of this species are thin, marked with scattered long black spines, and follow the leg length formula 4-1-2-3, meaning the fourth leg is the longest, followed by the first, second, and third legs respectively. The opisthosoma is oval in shape, and covered with sparse, long black setae. This species was first described from specimens collected on Hainan Island, southern China. Its type specimens were collected from Bawangling Town and Jianfengling Mountain in May 2009. Observed occurrences of P. digitula span from Taiwan to Singapore.
