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Hesperornis regalis

Geological Range

Santonian to Maastrichtian

Paleogeographic Distribution

New Jersey to Kansas to South Dakota

Stratigraphic Occurrences

Maastrichtian
Basal Hornerstown Formation (Newark Group) (NJ)
Campanian
Niobrara Formation (KS)
Pierre Shale (SD) [Campanian]
Santonian
Niobrara Formation (Smoky Hill) (KS)
<i> Hesperornis regalis </i> from the Late Cretaceous of Wallace County, Kansas (YPM VP 001200).
Hesperornis regalis from the Late Cretaceous of Wallace County, Kansas (YPM VP 001200).
<i> Hesperornis regalis </i> from the Late Cretaceous Niobrara Fm. of Wallace County, Kansas (YPM VP 001477).
Hesperornis regalis from the Late Cretaceous Niobrara Fm. of Wallace County, Kansas (YPM VP 001477).
Stratigraphic position unknown
Stratigraphic position unknown