Young specimens of an anomiid, probably Anomia ephippium, photographed by Malcolm Storey.

Belongs within: Pteriomorphia.

The Anomiidae, golden oysters, are a family of generally sessile bivalves that are first definitely known from the Jurassic (Todd & Palmer 2002). Anomiids usually have thin, translucent shells, and are attached to the substrate when mature by a byssal plug passing through a large foramen in the right valve. The dorsoventrally striated byssal plug is calcified by a mixture of calcite and aragonite.

<==Anomiidae [Anomioidea]
    |--Patro elyros (Gray 1849) TP02, H09 [=Anomia elyros H09]
    |--Eonomia TP02
    |--Juranomia Fürsich & Werner 1989 TP02
    |    `--*J. calcibyssata Fürsich & Werner 1989 TP02
    |--Monia TP02
    |    |--*M. zelandica F27a
    |    |--M. furcata (Suter 1907) [=Anomia furcata] F27a
    |    `--M. incisura A27
    |--Pododesmus TP02
    |    |--P. macrochizma KBC03
    |    |--P. patelliformis [=Monia patelliformis] TP02
    |    |--P. squama [=Monia squama] TP02
    |    `--P. squamula [=Heteranomia squamula] K92
    |--Anomia TP02
    |    |--A. ephippium Linnaeus 1758 L70
    |    |--A. sinensis GO06
    |    |--A. trigonopsis [incl. A. walleri] F27a
    |    |--A. undata Hutton 1885 F27b
    |    `--A. undulata Gmelin 1791 F27b
    `--Placunopsis Morris & Lycett 1853 [Placunopsidae] TP02
         |--P. inaequalis (Phillips 1829) (see below for synonymy) TP02
         |--P. arcensis Freneix 1986 [=P. radiata arcensis] TP02
         |--P. distracta (Eichwald 1865) TP02
         |--P. fuersichi Todd & Palmer 2002 TP02
         |--P. gingensis (Quenstedt 1856) TP02
         |--P. matercula TP02
         |--P. radians Morris & Lycett 1853 TP02
         |--P. semistriata (Bean 1839) [=Anomia semistriata] TP02
         |--P. socialis Morris & Lycett 1853 TP02
         `--P. suprajurensis TP02

Placunopsis inaequalis (Phillips 1829) [=Ostrea inaequalis, Anomia inaequalis; incl. Placunopsis fibrosa Laube 1867, Placuna jurensis Roemer 1836, *Placunopsis jurensis, Placunopsis oblonga Laube 1867, Orbicula radiata Phillips 1829, Placunopsis radiata] TP02

*Type species of generic name indicated


[A27] Allan, R. S. 1927. The geology and palaeontology of the Lower Waihao Basin, south Canterbury, New Zealand. Transactions and Proceedings of the New Zealand Institute 57: 265-309.

[F27a] Finlay, H. J. 1927a. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320-485.

[F27b] Finlay, H. J. 1927b. New specific names for austral Mollusca. Transactions and Proceedings of the New Zealand Institute 57: 488-533.

[GO06] Giribet, G., A. Okusu, A. R. Lindgren, S. W. Huff, M. Schrödl & M. K. Nishiguchi. 2006. Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons. Proceedings of the National Academy of Sciences of the USA 103 (20): 7723-7728.

[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.

[KBC03] Kashin, I. A., E. V. Bagaveeva & S. F. Chaplygina. 2003. Fouling communities of hydrotechnical constructions in Nakhodka Bay (Sea of Japan). Russian Journal of Marine Biology 29: 267-283.

[K92] Kozloff, E. N. 1992. The genera of the phylum Orthonectida. Cahiers de Biologie Marine 33: 377-406.

[L70] Leloup, E. 1970. Recherches sur l'ostreiculture dans le bassin de chasse d'Ostende en 1968. Bulletin de l’Institut Royal des Sciences Naturelles de Belgique 46 (6): 1-24.

[TP02] Todd, J. A., & T. J. Palmer. 2002. The Jurassic bivalve genus Placunopsis: New evidence on anatomy and affinities. Palaeontology 45 (3): 487-510.

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