Erycine boid snakes are well represented in the Late Oligocene and Early Miocene of North America. Here we report two genera and at least four species of small erycine snakes from the Early Oligocene of the Badlands National Park in South Dakota. The biostratigraphic ranges of Calamagras murivorus and Geringophis depressus are now extended into the Whitneyan North American Land Mammal Age.
Dennis Parmley and J. Alan Holman
"Erycine Boids from the Early Oligocene of the South Dakota Badlands,"
Georgia Journal of Science, Vol. 67, No. 2, Article 6.
Available at: https://digitalcommons.gaacademy.org/gjs/vol67/iss2/6