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Boonea bisuturalis
''Boonea bisuturalis'' (also known as the three-toothed odostome or the two-groove odostome) is a species of minute sea snail, a pyramidellid gastropod mollusk or micromollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of eleven known species within the Boonea genus of gastropods. 〔Bouchet, P. (2011). ''Boonea bisuturalis'' (Say, 1822). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=397024 on 2011-03-14〕
This species is ectoparasitic (an external parasite) on various bivalves and other gastropods. It is notorious as a pest on oyster beds. Its preferred hosts are the common periwinkle ''Littorina littorea'', the mud snail ''Hyanassa obsoleta'' or the eastern oyster ''Crassostrea virginica'' 〔( Robert Robertson and Terry Mau-Lastovicka, The Ectoparasitism of Boonea and Fargoa (Gastropoda: Pyramidellidae); Biol Bull157: 320-333. (October 1979) )〕
==Description==
The length of the shell varies between 2.8 mm and 5.8 mm. The smooth shell has a light brownish epidermis. The 5-6 whorls of the teleoconch show an impressed revolving line below the suture. The periphery is obtusely angulated.〔(G.W. Tryon, Manual of Conchology vol. VIII p. 357; 1886 (described as ''Odostomia bisuturalis'') )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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