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meaning: "Three tipped femur"
Named By: Cragin in 1888
Time Period: Late Cretaceous
Location: Canada - Manitoba. USA - Colorado, Kansas, Texas and Utah
Size: 3 meters long
Diet: Piscivore/Carnivore
Fossil(s): Multiple individuals
Classification: | Chordata | Reptilia | Sauropterygia | Plesiosauria | Polycotylidae |
Also known as: | Ceraunosaurus brownorum | Dolichorhynchops kirki | Dolichorhynchops willistoni | Trinacromerum anonymum | Trinacromerum brownorum | Trinacromerum willistoni |

Trinacromerum is an extinct genus of sauropterygian reptile, a member of the polycotylid plesiosaurs. It contains two species, T. bentonianum and T. kirki. Specimens have been discovered in the Late Cretaceous fossil deposits of what is now modern Kansas and Manitoba.

Read more about Trinacromerum at Wikipedia
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