Trinacromerum

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Trinacromerum
Fossil range: Late Cretaceous
Trinacromerum bentonianum from the Late Cretaceous of Kansas
Trinacromerum bentonianum from the Late Cretaceous of Kansas
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Plesiosauria
Suborder: Plesiosauroidea
Family: Polycotylidae
Genus: Trinacromerum
Trinacromerum at Royal Ontario Museum.
Trinacromerum at Royal Ontario Museum.

Trinacromerum is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It lived during the Late Cretaceous period in what is now Kansas. It was 3 meters (10 feet) long. Its teeth show it fed on small fish.