Abra is a

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 ...

of saltwater clams,

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 ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

s in 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 ...

Semelidae The Semelidae are a family of saltwater clams, marine bivalve molluscs in the order Cardiida. Description Members of this family have rounded or oval, elongated shells, much flattened. The two valves are connected by an internal ligament in con ...

. Members of this genus are mostly under 1.5 centimeters long, and have thin shells which are usually white. These bivalves normally live under the surface of sandy and muddy sediments, in the

neritic zone The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth. From the point of view of marine biology it forms a relatively stable and well-illuminated ...

. They are considered an important food source for flat fish.Rees, H.L. and Dare. P.J (1993)Sources of mortality and associated life-cycle traits of selected benthic species: a review. Fisheries Research Data Report No. 33, Directorate of Fisheries Research, Lowestoft.

Species

Species within the genus ''Abra'' include: *'' Abra aequalis'' ( Say, 1822) *'' Abra alba'' (Wood W., 1802) *''

Abra californica Abra may refer to: Places * Abra, Burkina Faso * Abra, Ivory Coast * Abra (province), a province of the Philippines ** Abra's at-large congressional district ** Legislative district of Abra * Abra de Ilog, a municipality of Occidental Mindoro ...

'' Kundsen, 1970 *''

Abra lioica Abra may refer to: Places * Abra, Burkina Faso * Abra, Ivory Coast * Abra (province), a province of the Philippines ** Abra's at-large congressional district ** Legislative district of Abra * Abra de Ilog, a municipality of Occidental Mindoro ...

'' (

Dall Dall may refer to: People * Anders Bendssøn Dall (died 1607), Danish Lutheran bishop * Bobby Dall (born 1963), American musician * Caroline Healey Dall (1822–1912), American feminist writer *Clarrie Dall (1887–1953), Australian footballer * C ...

, 1881) *'' Abra longicallis'' Sacchi, 1836 *''

Abra nitida Abra may refer to: Places * Abra, Burkina Faso * Abra, Ivory Coast * Abra (province), a province of the Philippines ** Abra's at-large congressional district ** Legislative district of Abra * Abra de Ilog, a municipality of Occidental Mindoro ...

'' (O. F. Mueller, 1776) *''

Abra pacifica Abra may refer to: Places * Abra, Burkina Faso * Abra, Ivory Coast * Abra (province), a province of the Philippines ** Abra's at-large congressional district ** Legislative district of Abra * Abra de Ilog, a municipality of Occidental Mindoro ...

, 1915 *'' Abra prismatica'' *'' Abra profundorum'' E. A. Smith, 1885 *''

Abra segmentum Abra may refer to: Places * Abra, Burkina Faso * Abra, Ivory Coast * Abra (province), a province of the Philippines ** Abra's at-large congressional district ** Legislative district of Abra * Abra de Ilog, a municipality of Occidental Mindoro ...

'' (Récluz, 1843) *'' Abra tenuis'' (Montagu, 1818) *'' Abra tepocana''

, 1915

References

* Semelidae Bivalve genera {{bivalve-stub