New Chesterian (Upper Mississippian) crinoids from Illinois New Chesterian (Upper Mississippian) crinoids from Illinois
Explosive evolutionary differentiation of unique group of Mississippian-Pennsylvanian camerate crinoids (Acrocrinidae) Explosive evolutionary differentiation of unique group of Mississippian-Pennsylvanian camerate crinoids (Acrocrinidae)
Crinoids of the Francis Shale (Missourian) of Oklahoma Crinoids of the Francis Shale (Missourian) of Oklahoma
Faunal studies of the type Chesteran, Upper Mississippian of southwestern Illinois Faunal studies of the type Chesteran, Upper Mississippian of southwestern Illinois
Middle Pennsylvanian (Atokan) crinoids from Oklahoma and Missouri Middle Pennsylvanian (Atokan) crinoids from Oklahoma and Missouri