COSEWIC Status Reports
COSEWIC Assessment and Status Report on the Brook Floater Alasmidonta varicosa in Canada
The Brook Floater, Alasmidonta varicosa (Lamarck, 1819), is a medium-sized freshwater mussel (50-65 mm long) with a kidney-shaped shell that is swollen in cross section. The shell is relatively thin, with a small patch of tiny ridges on the posterior edge that run perpendicular to the growth lines, creating a corrugated appearance. It is yellowish, greenish or brownish to black in colour, often with broad dark rays running from the top to the bottom. The Brook Floater has a cantaloupe-coloured foot that can be seen when the valves are still gaping as live individuals are removed from the water.
- HTML version of "COSEWIC Assessment and Status Report on the Brook Floater Alasmidonta varicosa in Canada"
- "COSEWIC Assessment and Status Report on the Brook Floater Alasmidonta varicosa in Canada" (2009-08-28) (PDF format, 1,001.67 KB)
c/o Canadian Wildlife Service
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