| Long solid mussel | |
|---|---|
| Fusconaia subrotunda | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionoida |
| Family: | Unionidae |
| Genus: | Fusconaia |
| Species: | F. subrotunda |
| Binomial name | |
| Fusconaia subrotunda (Lea, 1831) |
|
The long solid mussel, also known as the long solid naiad, scientific name Fusconaia subrotunda, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae.
This mussel, sometimes called a pigtoe, is found in river gravel. Young mussels are light brown, but darken to nearly black with age.
This species is found in Canada and the United States.