Palaechthon alticuspis (extinct)
Found in two samples
United States: Gidley Quarry (Early Palaeocene), Silberling Quarry (Early Palaeocene)
See also Palaechthon, Palaechthon woodi
United States: Gidley Quarry (Early Palaeocene), Silberling Quarry (Early Palaeocene)
See also Palaechthon, Palaechthon woodi