![Clam fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Allorisma.jpg)
![Clam fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Allorisma-1024x520.jpg)
AllorismaBivalve; Upper Carboniferous (Pennsylvanian); Boggy Formation; Pontotoc County, Oklahoma; CC BY-NC-ND 4.0
Allorisma
![Scallop fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Aviculopecen.jpg)
![Scallop fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Aviculopecen-1024x877.jpg)
AviculopecenBivalve; Upper Carboniferous (Pennsylvanian); Bartlesville Formation; Washington County, Oklahoma; CC BY-NC-ND 4.0
Aviculopecen
![Clam fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Sphenotus.jpg)
![Clam fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Sphenotus-1024x714.jpg)
Sphenotus sp.Bivalve; Upper Carboniferous (Pennsylvanian); Boggy Formation; Murray County, Oklahoma; CC BY-NC-ND 4.0
Sphenotus sp.
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Sphenotus-2.jpg)
![](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/04/BV-Sphenotus-2-1024x510.jpg)
Sphenotus sp.Bivalve; Upper Carboniferous (Pennsylvanian); Boggy Formation; Murray County, Oklahoma; CC BY-NC-ND 4.0