Latitudinal range: 42.2° to 51.1°

Found in 6 samples

Canada: Who Nose (Early Palaeocene), Police Point (Middle Palaeocene)

United States: Scarritt Quarry (Early Palaeocene), Douglass Quarry (Middle Palaeocene), Cedar Point Quarry (Late Palaeocene), Chappo Type Locality (Late Palaeocene)

See also Neoplagiaulax, Neoplagiaulax grangeri, Neoplagiaulax hazeni, Neoplagiaulax jepi, Neoplagiaulax kremnus, Neoplagiaulax mckennai, Neoplagiaulax nelsoni, Neoplagiaulax sp.