Uca vocans (Linnaeus, 1758)

Cancer vocans Linnaeus, 1758: 626 [type locality East Indies, probably Amboina (Crane 1975)].

Uca (Thalassuca) vocans vocans — Crane 1975: 92, pl. 14E–H, figs. 38I, L, 56B, 60C–E, 64F, FF [list]; Dai et al. 1986: 423, pl. 58(7), fig. 234(1, 2) [Fujian?; Hainan].

Uca (Thalassuca) vocans — Dai & Yang 1991: 463, pl. 58(7), fig. 234 [Fujian?; Hainan].

Uca (Gelasimus) vocans —Ng et al. 2008: 240 [list].

Uca vocans — Yang et al. 2008: 807 [Fujian?; Hainan].

Material examined. Hainan: 1 3 (damaged) (NCHUZOOL 13382), 3 ƤƤ (8.07–12.35 mm) (NCHUZOOL 13383), Wenchang, coll. K. Wong et al., 2 Dec. 2008; 1 3 (no CW data) (MBMCAS 161727), Sanya, 17 Mar. 1962; 12 3 (13.04–26.17 mm), 4 ƤƤ (3 ovig.) (14.62–16.11 mm) (NCHUZOOL 13182), Sanya, coll. H.-T. Shih & J.-H. Lee, Sanya, 28 Jun. 2004; 1 3 (24.28 mm) (NCHUZOOL 13181), Yulin, Sanya, coll. S.-L. Yang, 23 Feb. 1982.

Distribution. West Pacific and eastern Indian Ocean (the Ryukyus, Hainan in China, Philippines, Borneo, Indonesia, Malay Peninsula, Thailand, Burma).

Remarks. In our study, specimens of U. vocans were collected from Wenchang, in the south of eastern Hainan (sympatric with U. borealis, see Remarks under U. borealis), and Sanya, in southern Hainan. In northern Hainan, only U. borealis can be found. Because only U. borealis occurs along the coasts of continental China (including Fujian, Guangdong, northern Hainan, and Guangxi) (Table 1), the record of U. vocans from Fujian may prove to be only a mis-identification of U. borealis . Its presence will need to be verified through fresh surveys of the area.