Trinacromerum was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. Trinacromerum lived during the Late Cretaceous and resided in North America. The first Trinacromerum fossil was discovered in 1888.
Quick facts about Trinacromerum:
- Existed from 155.7 million years ago to 66 million years ago
- Lived in a marine environment
- Was a carnivore
- Reproduced by live birth
- 77 different specimens have been found by paleontologists
All the Trinacromerum illustrations below were collected from the internet. Enjoy and explore:
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Trinacromerum was described by the following scientific paper(s):
- B. A. Schumacher and M. J. Everhart. 2005. A stratigraphic and taxonomic review of plesiosaurs from the old "Fort Benton Group" of central Kansas: a new assessment of old records. Paludicola 5(2):33-54
- D. Bardack. 1968. Fossil vertebrates from the marine Cretaceous of Manitoba. Canadian Journal of Earth Sciences 5:145-153
- D. D. Gillette, M. C. Hayden, and A. L. Titus. 1999. Occurrence and biostratigraphic framework of a plesiosaur from the Upper Cretaceous Tropic Shale of southwestern Utah. Utah Geological Survey Miscellaneous Publication 99(1):269-273
