Gastropoda - Bellerophontida - Bellerophontidae

Synonyms: Aiptospira Wang 1980, Extendilabrum Wang 1980, Singulitubus Wang 1980, Tetratubispira Wang 1980

Full reference: J. B. Knight. 1945. Some new genera of the Bellerophontacea. Journal of Paleontology 19:333-340

Parent taxon: Knightitinae according to P. J. Wagner 2011

Sister taxa: Anapetopsis, Cymatospira, Knightites, Retispira

Subtaxa: Extendilabrum heshanensis, Patellilabia alticarinata, Patellilabia aplanata, Patellilabia chesterensis, Patellilabia junior, Patellilabia laevigata, Patellilabia rhombadella, Patellilabia scriptiferus, Patellilabia sulcata, Patellilabia tentoriolum

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Ecology: slow-moving low-level epifaunal detritivore