Abra
Two complete shells of Abra alba, one closed and one open
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Cardiida
Superfamily:	Tellinoidea
Family:	Semelidae
Genus:	Abra Leach in Lamarck, 1818
Species
See text.
Synonyms
Abra (Abra) Lamarck, 1818 · alternate representation Abrina Habe, 1952 Lutricularia Monterosato, 1884 Orixa Leach, 1852 junior subjective synonym Semele (Abra) Lamarck, 1818 Semele (Syndosmya) Récluz, 1843 Syndesmya [sic] misspelling Syndesmya (Abra) Lamarck, 1818 Syndesmya (Lutricularia) Monterosato, 1884 junior subjective synonym Syndosmya Récluz, 1843 ·

Abra is a genus of saltwater clams, marine bivalve mollusks in the family Semelidae. 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.^[1]

They are considered an important food source for flat fish.^[2]

Species within the genus Abra include:

• Abra bella Conrad, 1875: synonym of Semele bellastriata (Conrad, 1837)
• Abra brasiliana [sic]: synonym of Abra braziliensis (E. A. Smith, 1885) (misspelling)
• Abra cadabra Eames & Wilkins, 1957: synonym of Theora mesopotamica (Annandale, 1918)
• Abra fragilis Risso, 1826: synonym of Abra prismatica (Montagu, 1808)
• Abra intermedia (W. Thompson, 1845): synonym of Abra nitida (O. F. Müller, 1776)
• Abra isosceles (Hedley, 1909): synonym of Semele isosceles Hedley, 1909
• Abra kanamarui Kuroda, 1951: synonym of Abra lunella (A. Gould, 1861) 5junior subjective synonym)
• Abra kraemmeri Nicklès, 1955: synonym of Abra pilsbryi (Dautzenberg, 1912) (junior subjective synonym)
• Abra kurodai Habe, 1961: synonym of Abra fujitai Habe, 1958 ( junior subjective synonym)
• Abra lactea (Dunker, 1861) : synonym of Iacra seychellarum (A. Adams, 1856)
• Abra longicallis (R. A. Philippi, 1844): synonym of Abra longicallus (Scacchi, 1835) (unaccepted > unjustified emendation of Abra longicallus (Scacchi, 1835))
• Abra maxima (G. B. Sowerby III, 1894): synonym of Abra philippinensis (E. A. Smith, 1885)
• Abra milaschevichi Nevesskaja, 1963: synonym of Abra prismatica (Montagu, 1808)
• Abra nuculiformis Conrad, 1867: synonym of Abra aequalis (Say, 1822)
• Abra ovata (R. A. Philippi, 1836): synonym of Abra segmentum (Récluz, 1843) (junior homonym)
• Abra pacifica Dall, 1915: synonym of Cumingia pacifica (Dall, 1915) (original combination)
• † Abra patagonica Ihering, 1907: synonym of Abra uruguayensis (Pilsbry, 1897)
• Abra petiti (Dautzenberg, 1923): synonym of Iacra petiti Dautzenberg, 1923
• Abra renieri (Bronn, 1831): synonym of Abra alba (W. Wood, 1802)
• Abra segmentina H. Adams & A. Adams, 1856: synonym of Abra segmentum (Récluz, 1843)
• Abra seychellarum (A. Adams, 1856): synonym of Iacra seychellarum (A. Adams, 1856)
• Abra sinica F.-S. Xu, 1996: synonym of Moerella jedoensis (Lischke, 1872) : synonym of Moerella hilaris (Hanley, 1844)
• Abra skinoshitai [sic]: synonym of Abra kinoshitai (Kuroda & Habe, 1958) (misspelling)
• Abra trotteriana (G. B. Sowerby III, 1894): synonym of Iacra trotteriana (G. B. Sowerby III, 1894) (superseded combination)

• Habe T. (1952). Genera of Japanese shells. Pelecypoda No. 3. Pp. 187–278. Published by the author, Kyoto.
• Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196–219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch
• Coan, E. V.; Valentich-Scott, P. (2012). Bivalve seashells of tropical West America. Marine bivalve mollusks from Baja California to northern Peru. 2 vols, 1258 pp

• Lamarck, J.B. (1818). [volume 5 of Histoire naturelle des Animaux sans Vertèbres, préséntant les caractères généraux et particuliers de ces animaux, leur distribution, leurs classes, leurs familles, leurs genres, et la citation des principales espèces qui s'y rapportent; precedes d'une Introduction offrant la determination des caracteres essentiels de l'Animal, sa distinction du vegetal et desautres corps naturels, enfin, l'Exposition des Principes fondamentaux de la Zoologie. Paris, Deterville. vol 5: 612 pp.]
• Leach, W. E. (1852). Molluscorum Britanniae Synopsis. A synopsis of the Mollusca of Great Britain arranged according to their natural affinities and anatomical structure. Van Voorst, London, viii + 376 pp. (edited posthumously by J. E. Gray).
• Monterosato, T. A. di. (1884). Nomenclatura generica e specifica di alcune conchiglie mediterranee. Virzi, printed for the author, Palermo, 152 pp.
• Récluz, C. A. (1843). Monographie du genre Syndosmya. Revue zoologique, par la Société Cuvierienne. 6: 359–369
• Paredes, C.; Cardoso, F.; Santamaría, J.; Esplana, J.; Llaja, L. (2016). Lista anotada de los bivalvos marinos del Perú. Revista peruana de biología. 23(2), 127–150
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180–213
• "Abra". National Center for Biotechnology Information (NCBI).

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