Quadrum sissinghii Perch-Nielsen 1984
Demopolis Chalk, Demopolis Core Hole 1, Noxubee County, Mississippi, USA
Age: Campanian
Light Source: Polarized
Demopolis Chalk, Verona Section, Lee County, Mississippi, USA
Age: Campanian
Scanning Electron Micrograph: Magnification 11,400x