Key to Aquatic Macroinvertebrates in Utah - Small Clams
Corbiculidae (Asiatic Clam, INVASIVE)
Description: Thick, oval shell. Concentric striae feel rough when scratched. Length 10-20 mm, but can grow up to 50 mm. Yellow, green, or brown in color.
Habitat: Burrows in sediment of freshwater lakes and rivers. Cobiculidae has been collected throughout Utah from Lake Powell to Box Elder County.
Dreissenidae (Zebra and Quagga mussel, INVASIVE)
Description: Distinct triangular shaped shell, striped patterns. Exotic species from Eastern Europe. Up to 50 mm in length
Habitat: Zebra mussels are not yet found in Utah, Quagga mussels can be found in Sand Hollow Reservoir
Pisidiidae (Fingernail Clam)
Description: Shells are thin, smooth, and generally oval. Yellow, green or white in color. Less than 25 mm in length, generally less than 10 mm.
Habitat: Found in nearly all aquatic habitats.