Cymatoceras hilliOU 39168; Nautiloid; Lower Cretaceous; Grayson Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Cymatoceras hilli
Metengonoceras dumbliOU 37822; Ammonite; Lower Cretaceous; Duck Creek Member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Metengonoceras dumbli
Mortoniceras (Drakeoceras) maximumOU 37403; Ammonite; Lower Cretaceous; Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Mortoniceras (Drakeoceras) maximum
Mortoniceras (Mortoniceras) smedalaeOU 3436; Ammonite; Lower Cretaceous; Duck Creek Member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Mortoniceras (Mortoniceras) smedalae
Mortoniceras (Drakeoceras) sp.Ammonite; Lower Cretaceous; Weno Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Mortoniceras (Drakeoceras) sp.
Scaphites sp.Ammonite; Lower Cretaceous; Duck Creek Member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Scaphites sp.
Oxytropidoceras supaniAmmonite; Lower Cretaceous; Kiamichi Formation; Bryan County, Oklahoma; CC BY-NC-ND 4.0
Oxytropidoceras supani
Idiohamites sp.OU 3437; Ammonite; Lower Cretaceous; Duck Creek Member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Idiohamites sp.
Hamites fremontiAmmonite; Lower Cretaceous; Duck Creek Member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0
Hamites fremonti
Turrilites acutusAmmonite; Upper Cretaceous; Eagle Ford Formation; Bryan County, Oklahoma; CC BY-NC-ND 4.0
