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Abstract
The status of major genus-group names in the Mesodesmatidae is reviewed. Genera recognised in the Subfamily Mesodesmatidae are Donacilla de Blainville. 1819, Mediterranean Mactropsis Conrad. 1854. Tertiary of North America; Atactodea Dall, 1895, Indo-West Pacific; doubtfully Ceroniola Wilckens, 1904, Upper Cretaceous of South America; and Paphies Lesson [1831], with subgenera Paphies s.str., New Zealand; Mesodesma Deshayes [1832] (= Taria Gray, 1853), eastern and western South America, and New Zealand Amesodesma Iredale, 1930, south-eastern Australia: and Ceronia Gray, 1853, eastern North America. Other generic names in the family are briefly reviewed, and the preoccupied Nesis “Monterosato” Locard, 1899, is renamed Monterosatus.
Paphies (Amesodesma) perfuga (Iredale, 1930), type species of Amesodesma, is synonymlsed with Paphies (Amesodesma) angusta (Reeve, 1854). It Is suggested that Mesodesma quoyi Deshayes, [1832] is an earlier name for Paphies (Mesodesma) forsteriana (Finlay, 1927), which in turn is inseparable from P. (Mesodesma) pilocenica (Oliver, 1923).
Myadesma Clark, 1922, seems to belong in the Mactracea, but is placed in the family Myadesmatidae Clark, 1922, rather than in the Mesodesmatidae.