Rhynchonellata - Rhynchonellida

Parent taxon: Pugnacoidea according to A. Williams et al. 2002

Sister taxa: Aseptorhynchiidae, Basiliolidae, Camerophorinidae, Erymnariidae, Ladogiidae, Paranorellidae, Plectorhynchellidae, Pugnacidae, Rozmanariidae, Yunnanellidae

Subtaxa: Athabaschia, Bryorhynchus, Eurycolporhynchus, Leiorhynchoidea, Megalopterorhynchus, Ovlatchania, Parvaltissimarostrum, Petasmaria, Porostictia, Pugnoides, Rhynoleichus, Shumardella

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Type: Petasmaria

Ecology: stationary epifaunal suspension feeder