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Glochidia package (ovisac) of the Ouachita kidneyshell mussel
Ptychobranchus occidentalis
.mpg version (1.7 MB)

http://courses.smsu.edu/mcb095f/gallery/ouachita/kidneyshell.htm
Source: Chris Barnhart, Unio Gallery. Southwest Missouri University
Unio Gallery
http://courses.smsu.edu/mcb095f/gallery/

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Last updated on September 15, 2003
http://www.fws.gov/midwest/mussel/multimedia/ptychobranchus.html