A Peaclam - Pisidium variabile magnum
Fingernail clams are small "mostly about the size of a finger or thumbnail" bottom-dwelling, filter-feeders found in ponds, lakes and streams throughout Montana. They are native and can be quite abundant, providing food for a variety of animals and producing large accumulations of empty shells. These shells can be quite fragile compared to introduced Asian clams of the family Corbiculidae, which have not been reported in Montana, yet.
(Sterki 1916b) includes Montana in range.
Fingernail clams are mostly filter-feeders, siphoning in floating particulate organic materials ( small plant or animal) from the water column and straining out the particles and expel the strained water. Pedal feeding from the bottom with the foot muscle has also been observed.
- Literature Cited AboveLegend: View Online Publication
- Sterki, V. 1916b. A preliminary catalog of the North American Sphaeriidae. Nautilus 10(3/4):429-477.
- Additional Sources of Information Related to "Mussels / Clams"