Idiotrochus emarciatus ( Duncan, 1865 )

Cairns, S. D., 2004, The Azooxanthellate Scleractinia (Coelenterata: Anthozoa) of Australia, Records of the Australian Museum 56, pp. 259-329 : 296

Idiotrochus emarciatus ( Duncan, 1865)

Sphenotrochus emarciatus Duncan, 1865: 183–184 , pl. 8, figs. 2a–d (Miocene of Vic).

Sphenotrochus excicus Duncan, 1870: 298 , pl. 19, fig. 6 (Miocene of Vic) (junior objective synonym).

Sphenotrochus emarciatus var. perexigua Dennant, 1906: 151– 152 (SA).– Howchin, 1909: 245 (remarks).– Stranks, 1993: 20, 23 (remarks on types).

Idiotrochus emarciatus .– Wells, 1958: 262 (listed).– Squires, 1961: 18 (listed).–Cairns & Parker, 1992: 40–41, figs. 14e,f (SA).– Cairns, 1997: 21, pl. 2f, i.

Idiotrochus perexigua .– Cairns, 1989a: 36, pl. 18c (SA).

New records. None.

Types. The holotype of S. emarciatus is BM R29276. Type Locality: Miocene of Muddy Creek, Hamilton , Victoria .

The holotype of S. excicus is considered to be the same as that of S. emarciatus .

Nine syntypes were reported for S. emarciatus var. perexigua , six of which are deposited at SAM, NNM, and USNM (Cairns, & Parker, 1992; Stranks, 1993). Type Localities: Neptune Island, Cape Jaffa , and Beachport , South Australia, 82–238 m.

Remarks. Sphenotrochus excicus Duncan, 1870 is herein considered to be a junior objective synonym of S. emarciatus Duncan, 1865 because the descriptions (and figures) of both species are identical. One must assume that Duncan forgot that he had previously published this account in 1865 and inadvertently renamed it five years later.