Regina Baird and Girard 1853 (crayfish snake)
Reptilia - Squamata - Colubridae
PaleoDB taxon number: 67536
Synonym: Liodytes Cope 1885 (taxon 155186)
Parent taxon: Natricinae according to P. Uetz 2005
Sister taxa: Clonophis, Micronatrix, Natrix, Neonatrix, Nerodia, Paleonatrix, Rhabdophis, Seminatrix, Tropidoclonion, Virginia
Subtaxa: Regina alleni, Regina grahamii, Regina intermedia, Regina rigida, Regina septemvittata
Type: Coluber septemvittatus
Ecology: amphibious carnivore