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Hesperornis gracilis

Geological Range

Campanian

Paleogeographic Distribution

Kansas to Wyoming to South Dakota

Stratigraphic Occurrences

Campanian
Mesaverde Formation (Teapot Ss Member) (WY)
Pierre Shale (SD) [Campanian]
Unknown Stage
Mesa Verde Formation (WY)
Niobrara Formation (Smoky Hill Mbr) (KS)
Pierre Shale (SD)
<i> Hesperornis gracilis </i> from the Late Cretaceous Niobrara Fm. of Ellis County, Kansas (YPM VP 001679).
Hesperornis gracilis from the Late Cretaceous Niobrara Fm. of Ellis County, Kansas (YPM VP 001679).

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