Oxytoma is an extinct genus of bivalve molluscs that lived from the Late Permian to the early Paleocene,H. E. Vokes. 1980. Genera of the Bivalvia: a systematic and bibliographic Catalogue. Genera of the Bivalvia: a systematic and bibliographic CatalogueF. B. Meek. 1864. Section III. Description of the Jurassic Fossils. Palaeontology of California. Vol. I. 37-54 with a worldwide distribution except Australia.Oxytoma in the Paleobiology DatabaseFossils (Smithsonian Handbooks) by David Ward (Page 99) The genus was named in 1864 by Fielding Bradford Meek.F. B. Meek. 1864. Remarks on the family Pteriidae, (=Aviculidae) with descriptions of some new fossil genera. The American Journal of Science and Arts, Second Series 37:212-220
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