Rhynchonellata - Terebratulida
Parent taxon: Loboidothyridoidea according to A. Williams et al. 2006
Sister taxa: Alabushevothyrididae, Boreiothyrididae, Cheirothyropsidae, Cheniothyrididae, Clathrithyrididae, Dictyothyrididae, Dienopidae, Eplenyithyris, Goniothyridinae, Harpotothyrididae, Hesperithyrididae, Heterobrochinae, Jaisalmeria, Kendzhilgithyris, Lissajousithyrididae, Loboidothyrididae, Lobothyrididae, Lobothyroides, Magharithyris, Mametothyrididae, Muirwoodellidae, Naradanithyris, Neumayrithyris, Pamirothyris, Peristerothyris, Plectoconchidae, Psebajithyridinae, Rugithyris, Sogxianthyris, Spasskothyrididae, Taurothyris, Tchegemithyrididae, Tegulithyrididae, Triadithyrididae, Trichothyris, Trigonithyrididae, Tshemsarythyris, Viallithyris, Weldonithyris
Subtaxa: Arceythyris, Caryona, Conarothyris, Epithyris, Euidothyris, Ferrythyris, Galliennithyris, Gigantothyris, Glyphisaria, Habrobrochus, Heimia, Holcothyris, Juralina, Kutchithyris, Maritimithyris, Millythyris, Moeschia, Peculneithyris, Perrierithyris, Petalothyris, Plectoidothyris, Postepithyris, Pseudoaulacothyris, Somalithyris, Thadiqithyris, Xestosina
Type: Postepithyris
Ecology: stationary epifaunal suspension feeder