Tubuca dussumieri (H. Milne Edwards, 1852)

(Figs. 3C–H, 4C–F, 6)

Material examined. 1 male (21.9 × 13.5 mm), NCHUZOOL 17191, 1 male (19.2 × 12.2 mm), NCHUZOOL 17192, 1 female (21.6 × 14.2 mm), NCHUZOOL 17190, Tai Tam Bay (22.24665°N, 114.22510°E), Hong Kong, coll. P. J. Jimenez, 29 Jun. 2022 .

Remarks. Tubuca dussumieri is widely distributed in the eastern margin of the Indian Ocean and the West Pacific, from West Thailand to the Ryukyus and Solomon Islands (Crane 1975; Shih et al. 2015, 2022), with the type locality being Samarang, central Java, Indonesia (H. Milne Edwards 1852; Crane 1975). The male and female specimens collected from Hong Kong have the following important characters: carapace trapezoidal in outline, anterolateral angle subacute, directed anterolaterally, anterolateral margin short, dorsolateral margin long (Fig. 6A); major cheliped with outer dactylus with 2 long grooves, outer pollex with 1 long groove (Fig. 6B); minor fingers with a large tooth in female (Fig. 4E, F); G1 moderately slender, distal tip bluntly rounded; pore small, anterior flange complete and large, slightly projecting, posterior one small; inner process broad and flat, tip slightly bent inward (Fig. 6C–F); fresh color on anterior carapace pale and dark on posterior in adult, 3 white patches on dark carapace in female, cheliped orange (Figs. 3C–H, 4C–F). The above characters agree with specimens of T. dussumieri from Taiwan (Shih et al. 2015) and confirm the identify as T. dussumieri based on morphology. The COI analysis also supports the species identity (Fig. 7B; see DNA analysis).