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Barleeiidae (often also spelled Barleeidae) is a family of minute sea snails, micromollusks in the clade Littorinimorpha. 〔 Gofas S. (1995). A remarkable species richness of the Barleeidae (Gastropoda: Rissoacea) in the Eastern Atlantic. The Nautilus 109(1): 14-37 〕 These snails are very abundant and live in sublittoral and intertidal waters on rocky substrates. The shells are conical to high-spired. Their inner shell layer is chitinous. They are further characterized by a foot with sometimes a posterior mucous gland. Their olfactory organ, the osphradium is enlarged. In some species there are oesophageal pouches present. Their penis is sometimes provided with prostatic tissue. Their oviduct glands show a simple histology.〔Ponder W. F. (1983). "Review of the genera of the Barleeidae'' (Mollusca: Gastropoda: Rissoacea)". ''Records of the Australian Museum'' 35: 231-281.〕 Few malacologists are currently working on micromollusks. Since they are so small (only a few millimeters in size), they are difficult to study and classify. Therefore, these small mollusks are less well known than the larger ones. == Genera == Genera in the family Baleeiidae include: * ''Amphithalamus'' Carpenter, 1864 * ''Ansola'' Slavoschevskaya, 1975 * ''Barleeia'' Clark, 1853 - Barleysnails * ''Caelatura'' Conrad, 1853 * ''Fictonoba'' Ponder, 1967 * ''Ketosia'' Dos Santos & Absalao, 2006〔WoRMS (2009). ''Ketosia''. Accessed through the World Register of Marine Species at http://marinespecies.org/aphia.php?p=taxdetails&id=391637 on 2010-09-16〕 * ''Lirobarleeia'' Ponder, 1983 * ''Protobarleeia'' Ponder, 1983 * ''Pseudodiala'' Ponder, 1967 * ''Tropidorissoia'' Tomlin & Shackleford, 1915 ;Genera brought into synonymy: * ''Amphitalamus'' David, 1934 accepted as ''Amphithalamus'' Carpenter, 1864 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Barleeiidae」の詳細全文を読む スポンサード リンク
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