Rhynchonellata - Terebratulida - Postepithyrididae

Parent taxon: Postepithyrididae according to A. Williams et al. 2006

Sister taxa: Arceythyris, Caryona, Conarothyris, Epithyris, Ferrythyris, Galliennithyris, Gigantothyris, Glyphisaria, Habrobrochus, Heimia, Holcothyris, Juralina, Kutchithyris, Maritimithyris, Millythyris, Moeschia, Peculneithyris, Perrierithyris, Petalothyris, Plectoidothyris, Postepithyris, Pseudoaulacothyris, Somalithyris, Thadiqithyris, Xestosina

Subtaxa: Euidothyris euides, Euidothyris extensa

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Ecology: stationary epifaunal suspension feeder