Requienia (bivalve)

Requienia is an extinct genus of fossil saltwater clam, a marine bivalve molluscs in the order Hippuritida, family Requieniidae. These rudists lived in the Cretaceous period, from the Valanginian age (136.4–140.2) to the Campanian age (70.6–83.5 mya). They were stationary intermediate-level suspension feeders.

Requienia Temporal range: Valanginian-Campanian ~140–71 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Requienia ammonia from Cretaceous of France
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	†Hippuritida
Family:	†Requieniidae
Genus:	†Requienia Zakhera, 2011

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