Leptonysson orthius (extinct)
Found in two samples
United States: Cedar Point Quarry (Late Palaeocene), Divide Quarry (Middle Palaeocene)
See also Leptonysson, Leptonysson basiliscus
United States: Cedar Point Quarry (Late Palaeocene), Divide Quarry (Middle Palaeocene)
See also Leptonysson, Leptonysson basiliscus