Bivalvia - Protobranchia - Solemyidae

Alternative spelling: Petrasma

Parent taxon: Solemya according to E. V. Coan and P. Valentich-Scott 2012

Sister taxa: Solemya (Solemya), Solemya abbreviata, Solemya funingensis, Solemya insignifica, Solemya lomitensis, Solemya occidentalis, Solemya parallella, Solemya petricoloides, Solemya radiata, Solemya sulcifera, Solemya trapezoides, Solemya velum, Solemya ventricosa

Subtaxa: Solemya (Petrasma) borealis, Solemya (Petrasma) valvulus

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Ecology: facultatively mobile deep infaunal deposit feeder-chemosymbiotic