Stradneria crenulata (Bramletter & Martini) Noel 1970 (left)
Rotelapillus octoradiatus (Gartner) Perch-Nielsen 1984 (right)
Tupelo Tongue of the Coffee Sand (Type Locality), East Tupelo, Lee County, Mississippi, USA
Age: Campanian
Scanning Electron Micrograph: Magnification 6,000x