''Oxytoma'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus of

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

s that lived from the Late Permian to the early Paleocene, with a worldwide distribution except

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. The genus was named in 1864 by Fielding Bradford Meek.F. B. Meek. 1864. Remarks on the family

Pteriidae Pteriidae, also called the feather oysters, is a family of medium-sized to large saltwater clams. They are pearl oysters, marine bivalve molluscs in the order Pteriida. Some of the species in this family are important economically as the sou ...

, (= Aviculidae) with descriptions of some new fossil genera. The American Journal of Science and Arts, Second Series 37:212-220

References

Prehistoric bivalve genera Permian bivalves Triassic bivalves Jurassic bivalves Cretaceous bivalves Paleogene bivalves Prehistoric animals of Africa Prehistoric animals of Antarctica Prehistoric animals of Asia Prehistoric molluscs of Europe Prehistoric bivalves of North America Mesozoic animals of South America Lopingian first appearances Paleocene genus extinctions Fossil taxa described in 1864 Pectinida {{paleo-bivalve-stub