A specimen of the captorhinid reptile Olson, 1954, from the Hennessey formation, lower Permian of Oklahomav. 66No. 3327–332
Vaughn, Peter P. 1958. "A specimen of the captorhinid reptile Captorhinikos chozaensis Olson, 1954, from the Hennessey formation, lower Permian of Oklahoma." The Journal of geology, 66, (3) 327–332.