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

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 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 ...

mollusc 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 ...

s 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. Generally less than 80 mm long, ark clams vary both in shape and size. They number about 200 species worldwide. T ...

s. The genus is the only member of 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 ...

Cucullaeidae.

Species

The World Register of Marine Species lists the following

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

: *

† 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 or languages). It is one of the mo ...

'' 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