Named By: Chris Brochu - 1997.
Synonyms: Leidysuchus acutidentatus, Leidysuchus formidabilis, Leidysuchus sternbergii, Leidysuchus wilsoni.
Classification: Chordata, Reptilia, Crocodylomorpha, Crocodylia.
Species: B. sternbergii (type), B. acutidentatus, B. formidabilis, B. griffithi, B. threeensis, B. wilsoni.
Size: Up to 2.8 meters long, though there is some variance between species.
Known locations: Canada, including Alberta - Scollard Formation, and Saskatchewan - Ravenscrag Formation, and the USA, including the states of Colorado - DeBeque Formation, Laramie Formation and Ohio Creek Formation, Montana - Hell Creek Formation and Tullock Formation, New Jersey - Hornerstown Formation, North Carolina - Tar Heel Formation, North Dakota - Bullion Creek Formation and Hell Creek Formation, Texas, Wyoming - Bridger Formation, Green River Formation, Lance Formation, Willwood Formation.
Time period: Campanian of the Cretaceous through to the Eocene.
Fossil representation: Skulls and post cranial remains.
naming of the Borealosuchus genus was born out of a
revision of the
which has a reputation as something of a
‘wastebasket taxon’. So far four former species of Leidysuchus
have been renamed as species of Borealosuchus,
though two further
species have now also been named.
Borealosuchus was a mid-sized genus of crocodile, with the largest species B. acutidentatus attaining lengths of two hundred and eighty centimetres in length, with a skull thirty-six centimetres long. Borealosuchus is also another genus of crocodile that survived the KT extinction that marked the end of the dinosaurs, pterosaurs, and the great marine reptiles. It may be that the physiological and ecological characteristics of crocodiles allowed them to survive this extinction event as other crocodile genera such as Dyrosaurus and Brachychampsa are also known to have made it through this extinction event.
- A review of "Leidyosuchus" (Crocodyliformes, Eusuchia) from the Cretaceous through Eocene of North America. - Chris A. Brochu - 1997.
- A new crocodylian (Archosauria) from the basal Paleocene of the Red Deer River Valley, southern Alberta - Canadian Journal of Earth Sciences 38 (12): 1689–1704 -X. -C Wu, D. B. Brinkman & R. C. Fox - 2001.
- A new species of Borealosuchus (Crocodyliformes, Eusuchia) from the Late Cretaceous–early Paleogene of New Jersey - Journal of Vertebrate Paleontology 32 (1): 105–116. - C. A. Brochu, D. C. Parris, B. S. Grandstaff, R. K. Denton Jr & W. B. Gallagher - 2012.
- A New Crocodylian from the Late Maastrichtian of Spain: Implications for the Initial Radiation of Crocodyloids - PLoS ONE 6 (6): e20011. - Eduardo Puértolas, José I. Canudo and Penélope Cruzado-Caballero - 2011.