Latitudinal range: 37.4° to 49.3°

Found in 9 samples

Canada: Gryde (Maastrichtian)

United States: Purgatory Hill (Early Palaeocene), Spigot-Bottle (Maastrichtian), Z-Line Quarry (Early Palaeocene), Z-Line Quarry East (Early Palaeocene), Luck O Hutch (Early Palaeocene), Coke's Clemmys (Early Palaeocene), Mill Creek (MNA locality 1073) (Maastrichtian), Ferris Formation (UW locality V-91004) (Early Palaeocene)

See also Mesodma, Mesodma ambigua, Mesodma garfieldensis, Mesodma hensleighi, Mesodma pygmaea, Mesodma sp., Mesodma thompsoni