Ancalagon Conway Morris, 1977 † (basis of record)
Aysheaia Walcott, 1911 † (basis of record)
Bombinator Merrem, 1820 accepted as Bombina Oken, 1816 (extant flag source)
Bombinator Merrem, 1820 accepted as Bombina Oken, 1816 (basis of record)
Cambropodus Robison, 1990 † (basis of record)
Cardoarachnidium Taylor, 1990 † (basis of record)
Cardoarachnidium Taylor, 1990 † (extant flag source)
Childia Graff, 1910 (basis of record)
Childia Graff, 1910 (extant flag source)
Corynotrypa Bassler, 1911 † (basis of record)
Hallucigenia Conway Morris, 1977 † (basis of record)
Lobatocerebrum Rieger, 1980 (basis of record)
Lobatocerebrum Rieger, 1980 (extant flag source)
Luolishania Hoy & Chen, 1989 † (basis of record)
Mitrocystella Jaekel, 1901 † (basis of record)
Monocelis Ehrenberg, 1831 (basis of record)
Monocelis Ehrenberg, 1831 (extant flag source)
Paludina Férussac, 1812 accepted as Viviparus Montfort, 1810 (basis of record)
Paludina Férussac, 1812 accepted as Viviparus Montfort, 1810 (extant flag source)
Scotiaecystis Caster & Ubaghs, 1967 † (basis of record)
Scypha Gray in Gray, 1821 accepted as Sycon Risso, 1827 (basis of record)
Scypha Gray in Gray, 1821 accepted as Sycon Risso, 1827 (extant flag source)
Skara Müller, 1983 † (basis of record)