Distribution of Megalonaias nervosa (Washboard) specimens in the ISM Collections |
Megalonaias nervosa (Washboard) Records for Williamson County, Illinois- Catalog Number 676658
- Collector: Parmalee
Date: 1955
Drainage/Water body: Big Muddy - Catalog Number 676657
- Collector: Parmalee
Date: 1955
Drainage/Water body: Big Muddy
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