Xanthasia murigera White, 1846

Xanthasia murigera White, 1846: 177, pl. 2, fig. 3a. [type locality: Philippines]. — Haswell, 1882: 113. — Bürger, 1895: 386, pl. 10: fig. 31. — Grant & McCulloch, 1906: 6, 23. — Tesch, 1918: 246. — Schmitt et al., 1973: 97 –98. — Davie, 2002: 434.

Xanthasia muriger . — Serène, 1967: 824.

Material. QLD: AM G5721, 1 male (cw 4.8 mm, cl 4.8 mm), 1 female (cw 10.0 mm, cl 8.3 mm), Hayman Island, 23°32’S, 151°44’E, F. Grant; AM P4100, 1 male (cw 9.8 mm, cl 8.3 mm), 1 female (cw 13.7 mm, cl 10.8 mm), Crescent Reef, 14°26’S, 145°05’E, from Hippopus sp., C. Hedley & A. Briggs, 29 Jul 1916; AM P10059, 1 male (cw 12.1 mm, cl 9.7 mm), 1 female (cw 18.3 mm, cl 13.3 mm), North West Islet, Capricorn Group, 23°30’S, 152°00’E, reef, from Tridacna sp., A. Livingstone & W. Boardman, Jan 1931; AM P10535, 1 female (cw 9.8 mm, cl 8.3 mm), Hayman Island, 20°03’S, 148°53’E, 9 m, from Tridacna sp., F. McNeill, Jan 1934; AM P10734, 1 male (cw 8.6 mm, cl 7.2 mm), 1 female (cw 13.2 mm, cl 11.4 mm), Hayman Island, 20°03’S, 148°53’E, 9 m, from Tridacna sp. H. Kroyer; AM P15977–15979, 3 males (cw 6.5–8.0 mm, cl 6.2–6.6 mm), 3 females (cw 8.6–13.6 mm, cl 7.7–11.4 mm), One Tree Island, 23°30’S, 152°05’E, lagoon, from Tridacna maxima, J. Yaldwyn, Nov–Dec 1966; AM P24819–24280, 4 males (6.9– 10.3 mm, cl 5.6–7.5 mm), 4 females (cw 12.8–13.9 mm, cl 9.6–10.5 mm), Lizard Island, 14°40’S, 145°28’E, lagoon, inside Tridacna crocea, Ponder et al., Dec 1979.

Australian hosts. Bivalve molluscs, Tridacnidae . Hippopus sp. (this study), Tridacna crocea Lamarck, 1819 (this study), T. maxima Röding, 1798 (this study, Grant & McCulloch 1906, as T. elongata).

Remarks. Xanthasia murigera is reported from Hippopus sp. for the first time.

Distribution. Western Indian Ocean to the central Pacific including the Great Barrier Reef, Queensland and northern Western Australia (Schmitt et al. 1973, Davie 2002, this study).