![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Stenopecrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Stenopecrinus-695x1024.jpg)
Stenopecrinus fornuosusOU 3974; Crinoid; Upper Carboniferous (Pennsylvanian); Chanute Formation; Osage County, Oklahoma; CC BY-NC-ND 4.0
Stenopecrinus fornuosus
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Anobasicrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Anobasicrinus-684x1024.jpg)
Anobasicrinus balbosusOU 4030 (Holotype); Crinoid; Upper Carboniferous (Pennsylvanian); Holdenville Formation; Okmulgee County, Oklahoma; CC BY-NC-ND 4.0
Anobasicrinus balbosus
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Paianocrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Paianocrinus-740x1024.jpg)
Paianocrinus aptusOU 4168; Crinoid; Lower Carboniferous (Mississippian); Pitkin Formation; Muskogee County, Oklahoma; CC BY-NC-ND 4.0
Paianocrinus aptus
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Texicrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Texicrinus-1024x993.jpg)
Texacrinus californiusOU 4093 (Holotype); Crinoid; Upper Carboniferous (Pennsylvanian); Holdenville Formation; Okmulgee County, Oklahoma; CC BY-NC-ND 4.0
Texacrinus californius
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Agalocrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Agalocrinus-1024x872.jpg)
Agalacrinus magnusOU 4093 (Holotype); Crinoid; Upper Carboniferous (Pennsylvanian); Holdenville Formation; Okmulgee County, Oklahoma; CC BY-NC-ND 4.0
Agalacrinus magnus
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Corythocrinus.jpg)
![Crinoid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/CR-Corythocrinus-582x1024.jpg)
Corythocrinus undulatusOU 4169 (Holotype); Crinoid; Upper Carboniferous (Pennsylvanian); Holdenville Formation; Okmulgee County, Oklahoma; CC BY-NC-ND 4.0