Uca coarctata (H. Milne Edwards, 1852 )

Shih, Hsi-Te, Ng, Peter K. L., Fang, Shou-Hua, Chan, Benny K. K. & Wong, Kingsley J. H., 2010, Diversity and distribution of fiddler crabs (Brachyura: Ocypodidae: Uca) from China, with new records from Hainan Island in the South China Sea, Zootaxa 2640, pp. 1-19 : 8-9

Uca coarctata (H. Milne Edwards, 1852)

Gelasimus coarctatus H. Milne Edwards, 1852: 146 , pl. 3(6) [type locality “Odessa”].

Uca (Deltuca) coarctata — Crane 1975: 48, pls. 6E, F, 7, 46C, D, figs. 9B, 26A, 29A, 31A, 36B, 37C, 38M–P, 62A–C, 81D, 82H [list].

Uca (Tubuca) coarctata —Ng et al. 2008: 241 [in list].

Uca coarctata — Yang et al. 2008: 807 [Hainan].

Material examined. None.

Distribution. West Pacific (the Ryukyus, Taiwan, China (?), Philippines, Indonesia [including Sumatra], New Guinea, Australia).

Remarks. According to Crane (1975), U. coarctata mainly occurs on oceanic islands outside the South China Sea. Both U. typhoni and U. coarctata have a row of orbital tubercles and this has led to some confusion in their identification, however this row is relatively long in U. typhoni ( Fig. 5 A) and short in U. coarctata ( Shih et al. 2008: fig. 1H; see also Crane 1975: 622). We have identified specimens from southern Hainan as U. typhoni (see Remarks under U. typhoni ) but the recent record of U. coarctata from Hainan (see Yang et al. 2008) need to be verified. The species is included here as a doubtful record.

Figures

FIGURE 5. The floor of orbits and right gonopore of female specimens of Uca typhoni from Hainan, China (NCHUZOOL 13371, CW 30.75 mm) and U. demani from Cebu, Philippines (NCHUZOOL 13372, CW 17.4 mm). A, B, floor of left orbit of U. typhoni and U. demani, respectively, showing the tubercles (arrowed); C, D, the right gonopore and its position on sternum of U. typhoni and U. demani, respectively.