Ammonite (F. Brancoceratidae)
(DSM# 10676) Extinct genus - Mortoniceras is commonly known from sediments of the Western Interior Seaway. The seaway was a wide swath of sea that roughly cut North America in half north to south during the Cretaceous and early Paleocene periods.
83 million years
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“Mortoniceras aff. M. texanum (Roemer 1852) Ammonite,” Mississippi State University Libraries, accessed September 28, 2022, https://msstate-exhibits.libraryhost.com/items/show/1539.
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