![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46782-Sicberella-roemeri-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46782-Sicberella-roemeri-Sil.jpg)
SieberellaCC BY-NC-ND 4.0
Sieberella
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46759-Delthyris-kozlouiskii-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46759-Delthyris-kozlouiskii-Sil.jpg)
DelthyrisCC BY-NC-ND 4.0
Delthyris
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46768-Leptaena-oklahomensis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46768-Leptaena-oklahomensis-Sil-1024x466.jpg)
LeptaenaCC BY-NC-ND 4.0
Leptaena
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46757-Camerotoechia-oklahomensis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46757-Camerotoechia-oklahomensis-Sil.jpg)
CamerotoechiaCC BY-NC-ND 4.0
Camerotoechia
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46773-Atrupa-tennesseensis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46773-Atrupa-tennesseensis-Sil.jpg)
AtrupaCC BY-NC-ND 4.0
Atrupa
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46775-Rhipidomella-subtriangularis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46775-Rhipidomella-subtriangularis-Sil.jpg)
RhipidomellaCC BY-NC-ND 4.0
Rhipidomella
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46762-Fardenia-reedsi-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46762-Fardenia-reedsi-Sil.jpg)
FardeniaCC BY-NC-ND 4.0
Fardenia
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46755-Stegerhynchus-carmelensis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46755-Stegerhynchus-carmelensis-Sil.jpg)
StegerhynchusCC BY-NC-ND 4.0
Stegerhynchus
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46784-Ptychopleuella-rugiplicata-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46784-Ptychopleuella-rugiplicata-Sil.jpg)
PtychopleuellaCC BY-NC-ND 4.0
Ptychopleuella
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46733-Dictyonella-gibbosa-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46733-Dictyonella-gibbosa-Sil.jpg)
DictyonellaCC BY-NC-ND 4.0
Dictyonella
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46752-Lissatrypa-decaturensis-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46752-Lissatrypa-decaturensis-Sil.jpg)
LissatrypaCC BY-NC-ND 4.0
Lissatrypa
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46754-Strophonella-brolongate-Sil.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/08/46754-Strophonella-brolongate-Sil.jpg)
StrophonellaCC BY-NC-ND 4.0