Abra (bivalve)
Encyclopedia
Abra is a genus
of bivalve mollusks in the Semelidae
family
. Members of this genus are mostly under 1.5 centimetres long and have thin shells which are usually white. They normally live under the surface of sandy and muddy sediments in the neritic zone
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Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of bivalve mollusks in the Semelidae
Semelidae
The Semelidae are a family of clams, marine bivalve molluscs of the order Veneroida.-Characteristics:Menbers of this family have rounded or oval, elongated shells, much flattened. The two valves are connected by an internal ligament in contrast to the closely related family Tellinidae where the...
family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
. Members of this genus are mostly under 1.5 centimetres long and have thin shells which are usually white. They normally live under the surface of sandy and muddy sediments in the neritic zone
Neritic zone
The neritic zone, also called coastal waters, the coastal ocean or the sublittoral zone, is the part of the ocean extending from the low tide mark to the edge of the continental shelf, with a relatively shallow depth extending to about 200 meters...
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Species
- Abra aequalis (SayThomas SayThomas Say was an American naturalist, entomologist, malacologist, herpetologist and carcinologist. A taxonomist, he is often considered to be the father of descriptive entomology in the United States. He described more than 1,000 new species of beetles and over 400 species of insects of other...
, 1822) - Abra albaAbra albaAbra alba or the white furrow shell is a species of bivalve mollusc in the Semelidae family. It occurs in the north eastern Atlantic Ocean and the Mediterranean Sea, where it lives on the floor in shallow areas buried in soft sediments....
(Wood W., 1802) - Abra californica Kundsen, 1970
- Abra lioica (DallW. H. DallWilliam Healey Dall was an American naturalist, a prominent malacologist, and one of the earliest scientific explorers of interior Alaska...
, 1881) - Abra longicallis Sacchi, 1836
- Abra nitida (O. F. Mueller, 1776)
- Abra pacifica DallW. H. DallWilliam Healey Dall was an American naturalist, a prominent malacologist, and one of the earliest scientific explorers of interior Alaska...
, 1915 - Abra prismatica
- Abra profundorum E. A. Smith, 1885
- Abra segmentum (Récluz, 1843)
- Abra tenuis (Montagu, 1818)
- Abra tepocana DallW. H. DallWilliam Healey Dall was an American naturalist, a prominent malacologist, and one of the earliest scientific explorers of interior Alaska...
, 1915