''Requienia'' is an extinct

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

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 preserve ...

saltwater clam, a marine

bivalve Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s 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 organisms ...

, 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 and Fossilworks Fossilworks was a portal which provides query, download, and analysis tools to f ...

. These rudists lived in the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

period, from the

Valanginian In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 137.05 ± 0.2 Ma and 132.6 ± 0.2 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretac ...

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. Campa ...

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
{{Taxonbar, from=Q38380741 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