Bivalvia - Cardiida - Mactridae

Synonym: Symmorphomactra

Parent taxon: Mactrinae according to E.V. Coan et al. 2000

Sister taxa: Aliomactra, Allomactra, Andrusella, Avimactra, Crepispisula, Cryptomactra, Cymbophora, Diaphoromactra, Eopapyrina, Geltena, Harvella, Labiosa, Mactra, Mactrellona, Mactrinula, Mactrodesma, Nannomactra, Notospisula, Nymphactra, Ovamactra, Oxyperas, Priscomactra, Scalpomactra, Standella, Telemactra, Trinitasia

Subtaxa: Simomactra dolabriformis, Simomactra falcata

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Type: Mactra falcata

Ecology: facultatively mobile infaunal suspension feeder