The false ark shells (''Cucullaea'') are a small

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, biv ...

molluscs related to the

ark clam Ark clam is the common name for a family of small to large-sized saltwater clams or marine bivalve molluscs in the family Arcidae. Ark clams vary both in shape and size. They number about 200 species worldwide. The shells of ark clams are often ...

s. The genus is the only member of the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Cucullaeidae.

Species

The World Register of Marine Species lists the following

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

: *

† A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ...

'' Cucullaea elegans'' (Fischer) *

Cucullaea gigantea ''Cucullaea gigantea'' is an extinct species of false ark shell found in the United States, in the Aquia Formation in Maryland and Virginia along the Potomac River and its tributaries, and in Alabama. They flourished in marine environments during ...

'' Conrad, 1862Cucullaea gigantea Conrad, 1862 in Paleobiology Database (2018) https://www.gbif.org/species/121408017 *'' Cucullaea granulosa'' Jonas, 1846 *'' Cucullaea labiata'' Lightfoot, 1786) *'' Cucullaea petita'' Iredale, 1939 *'' Cucullaea vaga'' Iredale, 1930

References

Cucullaeidae {{bivalve-stub