''Caprina'' is a genus of

rudists Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organism ...

, a group of

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

heterodont In anatomy, a heterodont (from Ancient Greek, Greek, meaning 'different teeth') is an animal which possesses more than a single tooth morphology (biology), morphology. In vertebrates, heterodont pertains to animals where teeth are differentiate ...

bivalves 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, biv ...

belonging to the family

Caprinidae Caprinidae is a family of rudists, a group of unusual extinct saltwater clams, marine heterodont bivalves Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater mollus ...

.GBIF
/ref> These stationary intermediate-level epifaunal suspension feeders lived in the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

period, from 140.2 to 70.6 Ma. The rudists became extinct at the end of the Cretaceous, apparently as a result of the

Cretaceous–Paleogene extinction event The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary extinction) was a sudden extinction event, mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million y ...

. Fossils of this genus have been found in the sediments of Europe, Japan, Cuba, Mexico and the United States.

References

Cretaceous bivalves Hippuritida Prehistoric bivalve genera Early Cretaceous genus first appearances Albian genera Cenomanian genera Late Cretaceous genus extinctions {{cretaceous-animal-stub