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Painted rocksnail
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Painted rocksnail : ウィキペディア英語版
Painted rocksnail

The painted rocksnail, scientific name ''Leptoxis taeniata'', is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
This species is endemic to the United States, specifically the state of Alabama. The snail has been listed as threatened on the United States Fish and Wildlife Service list of endangered species since October 28, 1998.〔Fish and Wildlife Service. (October 28) 1998. (''Endangered and Threatened Wildlife and Plants; Endangered Status for Three Aquatic Snails, and Threatened Status for Three Aquatic Snails in the Mobile River Basin of Alabama'' ). Federal Register, Vol. 63, No. 208, Rules and Regulations, Accessed 26 January 2009.〕

== Description ==
The painted rocksnail is a small to medium-sized pleurocerid snail with a shell that measures about 19 mm (0.8 in) in length, and is subglobose to oval in shape. The aperture is broadly ovate, and rounded anteriorly. The shell coloration varies from yellowish to olive-brown, usually with four dark bands. Some shells do not have these dark bands, and some have the bands broken into square or oblong patches (see Goodrich, 1922〔Goodrich C. 1922. ''The Anculosae of the Alabama River Drainage''. Miscellaneous Publications, Museum of Zoology, University of Michigan (7):1-57.〕 for a detailed description).〔
All of the rocksnails that historically inhabited the Mobile Basin had broadly rounded apertures, oval shaped shells, and variable coloration. Although the various species were distinguished by relative sizes, coloration patterns, and ornamentation, identification could be confusing. The painted rocksnail is the only known survivor of the 15 rocksnail species that historically occurred in the Coosa River drainage.〔

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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