Faunal studies of the type Chesteran, Upper Mississippian of southwestern Illinois Faunal studies of the type Chesteran, Upper Mississippian of southwestern Illinois
Stenolobulites n. gen., Early Permian ancestor of predominantly Late Permian Paragastrioceratid subfamily Pseudogastrioceratinae Stenolobulites n. gen., Early Permian ancestor of predominantly Late Permian Paragastrioceratid subfamily Pseudogastrioceratinae