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This species has been frequently misidentified as other similar American freshwater mussels, especially before Frierson first described it in 1927. For example, it was formerly recognized as Lampsilis ligamentina ; [ 6 ] which probably arose from confusion with the superficially similar species Actinonaias ligamentina .
The freshwater pearl mussel (Margaritifera margaritifera) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.. Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species (e.g. Margaritifera auricularia) can also create pearls and some can also be used as a source of mother of pearl.
The two major classes of molluscs have representatives in freshwater: the gastropods (snails) and the bivalves (freshwater mussels and clams.) It appears that the other classes within the Phylum Mollusca -the cephalopods, scaphopods, polyplacophorans, etc. - never made the transition from a fully marine environment to a freshwater environment.
However, they do not colonize bare rock easily, instead preferring the shelter of pre-existing mussels and their biological filaments. Mussels attach themselves to the hard surfaces using their thread-like byssus. Given the right circumstances, California mussels can grow up to 200 mm (8 inches) in length and may live for more than 20 years.
Unionidae burrow into the substrate, with their posterior margins exposed. They pump water through the incurrent aperture, obtaining oxygen and food. They remove phytoplankton and zooplankton, as well as suspended bacteria, fungal spores, and dissolved organic matter.
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Like other freshwater mussels, this species releases its larvae, termed glochidia, into the water where they enter the bodies of fish as parasites to develop into juvenile mussels. Host fish species for this mussel include striped shiner ( Luxilus chrysocephalus ), redfin shiner ( Lythrurus umbratilis ), golden shiner ( Notemigonus crysoleucas ...
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