''Requienia'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

saltwater clam, a marine bivalve molluscs in the order

Hippuritida 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 organis ...

, family

Requieniidae Requieniidae is a family of rudists, in the order Hippuritida, which lived from 155.7 to 66.043 million years ago. Taxonomy Placed by the WoRMS Worms may refer to: *Worm, an invertebrate animal with a tube-like body and no limbs Places *W ...

. These rudists 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 the

Valanginian In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretace ...

age (136.4–140.2) to the

Campanian The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campani ...

age (70.6–83.5 mya). They were stationary intermediate-level suspension feeders.

Distribution

This genus occurs in the Cretaceous of Albania (collection), Croatia, France, Germany, Hungary, Iraq, Italy, Mexico, Oman, Portugal, Serbia and Montenegro, Spain, Switzerland, Turkey, Ukraine, United States, Venezuela; Jurassic of Hungary.

Species

*''Requienia ammonia'' *''Requienia migliorinii'' *''Requienia renevieri''

References

External links

Universal Biological Indexer

Paleobiology Database
* Sepkoski, Jac
Sepkoski's Online Genus Database
Hippuritida Prehistoric bivalve genera Valanginian genus first appearances Campanian genus extinctions Cretaceous animals of Asia Fossils of Iraq Fossils of Oman Fossils of Turkey Cretaceous molluscs of Europe Fossils of Albania Fossils of Croatia Fossils of France Fossils of Germany Fossils of Hungary Fossils of Italy Fossils of Portugal Fossils of Spain Fossils of Switzerland Fossils of Ukraine Fossils of Serbia Cretaceous animals of North America Fossils of Mexico Fossils of the United States Cretaceous animals of South America Fossils of Venezuela Fossil taxa described in 2011 {{cretaceous-animal-stub