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Lampsilis fasciola
''Lampsilis fasciola'', common name the Wavy-rayed Lampmussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
== Appearance and Description ==
The Wavy-rayed Lampmussel is a relatively small mussel distributed through out Southern Ontario and the North-Eastern sections of the United States. The mussel is characterized by its yellow to yellowish-green colour. The mussel receives its name from the numerous thin wavy rays rays that cover its shell. These waves can be thin and separate or coalesced into significantly wider rays. The beak is slightly elevated above the hinge lines and the beak sculpture consists of 3 to 5 wavy lines. The shell is compressed to inflated (females) in shape and the anterior end is rounded with the posterior end bluntly pointed in males and rounded in females.〔(【引用サイトリンク】url=http://mnfi.anr.msu.edu/explorer/species.cfm?id=12367 )〕 The mussel's nacre is typically white or bluish, and the shell in general is rounded and generally symmetrical over the axis. The shell is mostly smooth, excepting certain wrinkles and growth rests that may appear. Wavy-rayed Lampmussles are typically less than 75mm, but have been known to grow up to 90-100mm in length.
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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