''Circomphalus'' is a

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 ...

of saltwater clams, 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 ...

molluscs 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 ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Veneridae The Veneridae or venerids, common name: Venus (mythology), Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and m ...

, the venus clams.

Fossil records

The genus ''Circomphalus'' is known from the

Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...

to the

Recent The Holocene () is the current geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Qu ...

periods (age range: from 15.97 to 0.0 million years ago).

Species

Species within this genus, according to

ITIS The Integrated Taxonomic Information System (ITIS) is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagenc ...

, include: * ''

Circomphalus callimorphus ''Circomphalus'' is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Recent periods (age range: from 15.97 to 0.0 million ye ...

'' (Dall, 1902) * ''

Circomphalus casina ''Circomphalus'' is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Recent periods (age range: from 15.97 to 0.0 million ye ...

'' (Linnaeus, 1758) * ''

Circomphalus fordi ''Circomphalus'' is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Recent periods (age range: from 15.97 to 0.0 million ye ...

'' (Yates, 1890) * ''

Circomphalus strigillinus ''Circomphalus'' is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Recent periods (age range: from 15.97 to 0.0 million ye ...

'' (Dall, 1902) According to the

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

, the species are:WoRMS
/ref> * ''

Circomphalus disjectus ''Circomphalus'' is a genus of saltwater clams, marine (ocean), marine bivalve molluscs in the family (biology), family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Holocene, Recent perio ...

'' (Perry, 1811) * ''

Circomphalus foliaceolamellosus ''Circomphalus foliaceolamellosus'' is a species of saltwater clam, a marine (ocean), marine bivalve mollusc in the family (biology), family Veneridae, the venus clams. Right and left valve of the same specimen: File:Circomphalus foliaceolame ...

'' (Dillwyn, 1817) * ''

Circomphalus hiraseanus ''Circomphalus'' is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams. Fossil records The genus ''Circomphalus'' is known from the Miocene to the Recent periods (age range: from 15.97 to 0.0 million ye ...

'' (Kuroda, 1930) * '' Circomphalus yatei'' (Gray, 1835)

References

Veneridae Bivalve genera {{Veneridae-stub