Labiosa Schmidt 1832 (clam)
Bivalvia - Cardiida - Mactridae
Parent taxon: Mactrinae according to L. C. Glenn 1904
Sister taxa: Aliomactra, Allomactra, Andrusella, Avimactra, Crepispisula, Cryptomactra, Cymbophora, Diaphoromactra, Eopapyrina, Geltena, Harvella, Mactra, Mactrellona, Mactrinula, Mactrodesma, Nannomactra, Notospisula, Nymphactra, Ovamactra, Oxyperas, Priscomactra, Scalpomactra, Simomactra, Standella, Telemactra, Trinitasia
Subtaxa: Labiosa (Labiosa)
Ecology: facultatively mobile infaunal suspension feeder