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Montana Field Guide

Montana Field Guides

A Peaclam - Musculium ryckholti


Global Rank: GNR
State Rank: SNR

Agency Status
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USFS:
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General Description
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.

Range Comments
Sterki (1916b) includes Montana in range, same data also cited by Henderson (1924).

Summary of Observations Submitted for Montana
Number of Observations: 1

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Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Food Habits
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.

References
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Citation for data on this website:
A Peaclam — Musculium ryckholti.  Montana Field Guide.  .  Retrieved on , from