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Lepetodrilidae is a family of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda (according taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). 〔 Bouchet, P.; Gofas, S. (2012). Lepetodrilidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=180906 on 2013-02-16 〕 This family has no subfamilies. ==Description== These deep-sea species are found and are endemic at hydrothermal vents. Their limpet-shaped shell consist of non-nacreous aragonite. The thick periostracum covers the shell edge. The apex is posterior, in some species projecting posteriorly, and deflected to the right. The shell has no sculpture or it consists of beads or imbricate radial ribs. There is no operculum. The muscle scar forms the shape of a horseshoe. The rhipidoglossate radula is special as the lateral teeth descend toward the rachidian in a v-arrangement. The conspicuous penis is situated near the base of the right cephalic tentacle. 〔 J. H. McLean, ''New Archaeogastropod Limpets from Hydrothermal Vents; Superfamily Lepetodrilacea I. Systematic Descriptions'', Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, Vol. 319, No. 1192 (May 4, 1988), pp. 1-32 〕 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「Lepetodrilidae」の詳細全文を読む スポンサード リンク
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