Callipterids are an assortment of leaf-types that are assignable to Peltasperms (Seed Plants) that are common in Permian rocks of Oklahoma. Like Gigantopterids to which they might be related evolutionarily, Callipterids have not been studied systematically and any genus assignment is tentative.
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00003800.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00003800-740x1024.jpg)
CallipteridOPC 3084-3800; Peltasperm (Seed Plant); Early Permian; Garber Formation; Tillman County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008729.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008729.jpg)
CallipteridOPC 3084-8729; Peltasperm (Seed Plant); Early Permian; Garber Formation; Tillman County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00007758.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00007758-1024x900.jpg)
CallipteridOPC 3084-7758; Peltasperm (Seed Plant); Early Permian; Garber Formation; Tillman County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00009607.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00009607.jpg)
CallipteridOPC 3084-9607; Peltasperm (Seed Plant); Early Permian; Garber Formation; Tillman County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008923.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008923-834x1024.jpg)
CallipteridOPC 2001-8923; Peltasperm (Seed Plant); Early Permian; Midco Member, Wellington Formation; Noble County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010602.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010602-793x1024.jpg)
CallipteridOPC 2001-10602; Peltasperm (Seed Plant); Early Permian; Midco Member, Wellington Formation; Noble County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010615.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010615.jpg)
CallipteridOPC 2001-10615; Peltasperm (Seed Plant); Early Permian; Midco Member, Wellington Formation; Noble County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010255.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010255-1024x806.jpg)
CallipteridOPC 2001-10255; Peltasperm (Seed Plant); Early Permian; Midco Member, Wellington Formation; Noble County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008708.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00008708-857x1024.jpg)
CallipteridOPC 3084-8708; Peltasperm (Seed Plant); Early Permian; Garber Formation; Tillman County, Oklahoma; CC BY-NC-ND 4.0
Callipterid
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010271.jpg)
![Callipterid fossil](https://samnoblemuseum.ou.edu/wp-content/uploads/2017/02/Callipterid-00010271-1024x801.jpg)
CallipteridOPC 2001-10271; Peltasperm (Seed Plant); Early Permian; Midco Member, Wellington Formation; Noble County, Oklahoma; CC BY-NC-ND 4.0