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Temporal range: Cretaceous
Rudista - Requienia ammonia.JPG
Requienia ammonia from Cretaceous of France
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Hippuritoida
Family: Requieniidae
Genus: Requienia
Zakhera 2011

Requienia is an extinct genus of fossil saltwater clam, a marine bivalve mollusk in the order Hippuritoida, 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.


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.


  • Requienia ammonia
  • Requienia migliorinii
  • Requienia renevieri