Didelphodon

Didelphodon is an extinct genus of large, carnivorous metatherian mammals from Late Cretaceous North America, known for powerful jaws and crushing teeth.

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Metatheria: The mammalian lineage that includes marsupials and their extinct relatives. Didelphodon belongs to this lineage, though its exact position among metatherians remains debated.
Mammalian jaw: The lower jaw and its joints, muscles, and teeth used to capture and process food. Didelphodon’s deep, strong jaw supported forceful biting.
Joseph Leidy: An American anatomist and paleontologist who described many North American fossil vertebrates. Leidy named Didelphodon from fossils collected in the nineteenth century.
Didelphodon vorax: A species of Didelphodon known from Late Cretaceous North America. It is the best-known species and anchors much discussion of the genus’s anatomy.
Mammalia: The vertebrate class distinguished by hair, mammary glands, and specialized jaw and ear bones. Didelphodon was a mammal, within the broader group that also includes monotremes and placentals.
Bite force: The force exerted when an animal closes its jaws on an object. Its jaw anatomy has been used to estimate the strength of Didelphodon’s bite.
Lance Formation: A Late Cretaceous rock formation in Wyoming known for dinosaur and mammal fossils. Fossils assigned to Didelphodon are known from this formation.
Didelphodon padanicus: A species assigned to Didelphodon from Late Cretaceous deposits in North America. Its fossil material contributes to the genus’s recognized species diversity.
Marsupial: A metatherian mammal whose young typically complete development attached to a teat, often within a pouch. Living marsupials clarify the lineage, but Didelphodon was not necessarily a member of the crown group.
Dental occlusion: The contact relationship between upper and lower teeth when the jaws close. Tooth fit and wear help explain how Didelphodon crushed food.