Describer

Marsh, 1876

Time

Cretaceous Late Coniacian Santonian Campanian Maastrichtian

Classification

Saurischia Theropoda Tetanurae Coelurosauria Maniraptora Avialae Ornithothoraces Ornithurae [Hesperonithiformes]

Fossilsite

Niobrara Chalk Formation, Kansas, US

Fall Under

Hesperornis regalis

Info

Hesperornis regalis (Marsh, 1872) (= [Hargeria] Lucas, 1903; [Lestornis] Marsh, 1876) > Hesperornis crassipes (Marsh, 1876) [= Lestornis crassipes (Marsh, 1876)] > Hesperornis gracilis (Marsh, 1876) [= Hargeria gracilis (Marsh, 1876)]

Partial postcranial skeleton.