Bivalvia - Unionida

Parent taxon: Unionoidea according to J. G. Carter et al. 2011

Sister taxa: Actinodontophoridae, Margaritiferidae, Mutelidae, Sancticarolitidae

Subtaxa: Acuticosta, Alasmidonta, Alasmidontinae, Ambleminae, Anodonta, Cuneopsis, Elongaria, Gonideinae, Lamprotula, Modellnaiinae, Paranodonta, Parreysiinae, Plicatounio, Potomida, Pseudodon, Qiyangiinae, Rectidentinae, Rhabdotophorus, Shistodesmus, Unioninae

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Ecology: facultatively mobile infaunal suspension feeder