Latitudinal range: 41.6° to 46.2°

Found in two samples

United States: Gidley Quarry (Early Palaeocene), Little Muddy Creek (Middle Palaeocene)

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