Belongs within: Pholadomyoida.
Myadora is a genus of free-living bivalves with unequal valves, one flattened and one convex, found from the Miocene to the present day of Australasia and the west Pacific. The valves have a flattened cardinal area on either side of the beaks. Members of the genus live buried in sand with the more inflated valve downwards.
Myadora Gray 1840P61 [=MyodoraF27]
|--*M. brevis (Sowerby 1829)P61, TW07 [=Pandora brevisP61, Myodora brevisH09]
|--M. albida Tenison Woods 1876TW76
|--M. antipoda Smith 1880P61
|--M. australica (Reeve 1859) [=Thracia australica, Myodora australica]H09
|--M. biconvexa Powell 1927P61
|--M. boltoni Smith 1880P61
|--M. complexa Iredale 1924S-S90
|--M. crassaF27
|--M. delicataBRW98
|--M. lamellataSB93
|--M. novaezelandiae Smith 1880P61
|--M. pandoriformis (Stutchbury 1830)TW07
|--M. pervalidaBRW98
|--M. pulleinei Hedley 1906 [=Myodora pulleinei]H09
|--M. strangeiBRW98
|--M. striata (Quoy & Gaimard 1835)P61 [=Myodora striataW27]
|--M. subrostrata Smith 1880P61
|--M. rotundata Sowerby 1875F27 [incl. M. tasmanica Tenison Woods 1876F27, TW76]
|--M. tenuilirataQ72
`--M. trigona [=Myodora trigona]H09
*Type species of generic name indicated
References
[BRW98] Beesley, P. L., G. J. B. Ross & A. Wells (eds) 1998. Fauna of Australia vol. 5. Mollusca: The Southern Synthesis. Part A. Australian Biological Resources Study: Canberra.
[F27] Finlay, H. J. 1927. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.
[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.
[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.
[Q72] Quilty, P. G. 1972. The biostratigraphy of the Tasmanian marine Tertiary. Papers and Proceedings of the Royal Society of Tasmania 106: 25–44.
[SB93] Skelton, P. W., & M. J. Benton. 1993. Mollusca: Rostroconchia, Scaphopoda and Bivalvia. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 237–263. Chapman & Hall: London.
[S-S90] Slack-Smith, S. M. 1990. The bivalves of Shark Bay, Western Australia. In: Berry, P. F., S. D. Bradshaw & B. R. Wilson (eds) Research in Shark Bay: Report of the France-Australe Bicentenary Expedition Committee pp. 129–157. Western Australian Museum.
[TW07] Taylor, J. D., S. T. Williams, E. A. Glover & P. Dyal. 2007. A molecular phylogeny of heterodont bivalves (Mollusca: Bivalvia: Heterodonta): new analyses of 18S and 28S rRNA genes. Zoologica Scripta 36 (6): 587–606.
[TW76] Tenison Woods, J. E. 1876. Description of new Tasmanian shells. Papers and Proceedings of the Royal Society of Tasmania 1875: 134–162.
[W27] Waghorn, R. J. 1927. The geology of the Ruakokopatuna Valley, southern Wairarapa. Transactions and Proceedings of the New Zealand Institute 57: 226–234.