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Yonge, C. M. (1977). Form and Evolution in the Anomiacea (Mollusca: Bivalvia)--Pododesmus, Anomia, Patro, Enigmonia (Anomiidae): Placunanomia, Placuna (Placunidae Fam. Nov.). Philosophical Transactions of the Royal Society B: Biological Sciences. 276(950): 453-523.
Yonge, C. M. (1977). Form and Evolution in the Anomiacea (Mollusca: Bivalvia)--Pododesmus, Anomia, Patro, Enigmonia (Anomiidae): Placunanomia, Placuna (Placunidae Fam. Nov.). Philosophical Transactions of the Royal Society B: Biological Sciences. 276(950): 453-523.