Mesodma ambigua (extinct)
Latitudinal range: 41.9° to 47.6°
Found in 3 samples
United States: Purgatory Hill (Early Palaeocene), Ferris Formation (UW locality V-91004) (Early Palaeocene), Ferris Formation (UW locality V-91031) (Early Palaeocene)
See also Mesodma, Mesodma formosa, Mesodma garfieldensis, Mesodma hensleighi, Mesodma pygmaea, Mesodma sp., Mesodma thompsoni