identified by scientist Carboniferous Mississippian Lower Mississippian Midwestern USA Chouteau Group FEU-1004926
|  | identified by scientist Carboniferous Mississippian Lower Mississippian Midwestern USA Northview FM FEU-1004751
|  | identified by scientist Carboniferous Mississippian Lower Mississippian Midwestern USA Northview FM FEU-1004752
|  | identified by scientist Carboniferous Mississippian Lower Mississippian Midwestern USA Northview FM FEU-1004753
|  | identified by scientist Carboniferous Mississippian Lower Mississippian Midwestern USA Hannibal FM FEU-1004780
|  |