Ostracotheres subglobosus (Baker, 1907)

Pinnoteres subglobosa Baker, 1907: 179 [type locality: St. Vincent’s Gulf, South Australia].

Ostracotheres (?) (‘ Pinnotheres ’) subglobosus . — Tesch, 1918: 287 (list).

Pinnotheres subglobosa . — Rathbun, 1923: 96 –97, fig. 1, pl. 16, text fig 1. — Hale, 1927a: 312; 1927b: 173–174, fig. 174. — Sakai, 1939: 597.

Pinnotheres subglobosus . — Schmitt et al., 1973: 88. — Davie, 2002: 434.

Ostracotheres subglobosus . — Pregenzer, 1988: 17 –21, figs. 1–9.

Ostracotheres subquadratus Sakai, 1939: 596 –597, fig. 82 [type locality: Ise Bay, Japan].

Australian hosts. Bivalve molluscs. ‘Pectens’ (Baker 1907). Spondylus tenellus Reeve, 1856 (Spondylidae) Equichlamys bifrons (Lamarck, 1819) (as Chlamys bifrons) ( Pectinidae), Modiolus sp. (as Modiolaria australis) ( Mytilidae) (Hale 1927b). Pecten fumatus Reeve, 1852 (as Notovola meridionalis Tate) ( Pectinidae) (Pregenzer, 1988).

Remarks. Pregenzer (1988) synonymised O. subquadratus from Japan with O. subglobosus from South Australia after comparing Japanese and South Australian material. The resulting disjunct distribution of O. subglobosus is suspect, particularly since no records exist of the species from intermediate localities. Whether the two nominal species are distinct, or whether the disjunct distribution is the result of human introduction to one or other region remains to be tested. In the absence of evidence to the contrary, O. subquadratus is retained in the synonymy of O. subglobosus .

Distribution. South Australia and Japan (Pregenzer 1988).