Actinoceramus

Actinoceramus is an extinct genus of fossil saltwater clams, marine pteriomorphian bivalve molluscs. These bivalves were facultatively mobile infaunal suspension feeders.
Species.
Species within "Actinoceramus":
Distribution.
Fossils of species of this genus have been found in the Cretaceous of Antarctica, Australia, Brazil, Canada, Colombia (Hiló Formation, Tolima), Ecuador, Egypt, France, Germany, Italy, Japan, New Zealand, Peru, Russia, Spain, the United Kingdom and the United States.