Latitudinal range: 33.7° to 42.6°

Found in 10 samples

United States: Bluegrass (macro) (Holocene), Bluegrass (micro) (Holocene), Mykut Rockshelter (Holocene), Pacific City (Late Pleistocene), Prairie Creek (Zone D) (Late Pleistocene), Prairie Creek (Zone C) (Pleistocene - Holocene), Prairie Creek (Zone B) (Holocene), Smith Creek Canyon (Reddish-brown Silt) (Late Pleistocene), WaKeeney (UM-K6-59) (Late Miocene), Pratt slide (Late Miocene)

See also Thamnophis, Thamnophis cyrtopsis, Thamnophis elegans, Thamnophis eques, Thamnophis marcianus, Thamnophis proximus, Thamnophis sauritus, Thamnophis scalaris, Thamnophis sirtalis, Thamnophis spp., Thamnophis sumichrasti