†Cosmasyrinx Marwick 1931 (turrid)
Gastropoda - Neogastropoda - Turridae
Parent taxon: Turrinae according to J. D. Stilwell et al. 2004
Sister taxa: Acamptogenotia, Austroturris, Epidirella, Fenimorea, Fusiturris, Gemmula, Globidrillia, Ingaunoturricula, Insolentia, Lucerapex, Micantapex, Mitromorpha, Parasyrinx, Pleuroliria, Polystira, Taranis, Turridrupa, Viridoturris, Xenoturris, Xenuroturris
Subtaxa: Cosmasyrinx (Tholitoma)
Ecology: epifaunal carnivore