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Cynognathus: The Giant Dog-Like Cynodont of the Triassic Period

Cynognathus was a close relative of mammals that lived during the Triassic Period, the dawn of the Age of Reptiles. Although technically not a mammal itself, Cynognathus already had most of the traits that set mammals apart from reptiles. In sharp contrast to the mammals that lived in the shadows of the dinosaurs, this protomammal was close to the top of the Triassic food chain. Indeed, Cynognathus was able to match the size and power of the extinct dire wolf, making it easily big enough to hunt the early dinosaurs of its time. Besides being one of the deadliest predators during the opening of the Triassic Period, Cynognathus was also the most successful. It lived throughout the southern hemisphere and had a longer evolutionary history than any other contemporary carnivore. The study of Cynognathus has also greatly contributed to science's understanding of the wider Mesozoic world and beyond. The presence of its fossils across various continents helped lead to the discovery of plate tectonics. It is also the index taxon in the South Africa Karoo Supergroup, a major fossil bearing site. The discovery of Cynognathus fossils in Late Triassic rocks has also lead paleontologist to rethink the traditional progression of the Triassic fauna, as well as suggesting that the age of many supposedly Middle Triassic formations could be up to ten million years off. Whatever the case, Cynognathus is easily one of the most important creatures from the entire Triassic Period. Thank you to Matt Waszak for narrating this video, to Dr. Susan E. Evans for weighing in on the nature of Cynognathus's purported palatal teeth, to Literally Miguel for creating illustrations specifically for this video, and to my supporters on Patreon for choosing the topic. Patreon link:   / chimerasuchus   Sources: https://royalsocietypublishing.org/do... https://www.academia.edu/23751123/The... https://royalsocietypublishing.org/do... https://www.semanticscholar.org/paper... https://www.tandfonline.com/doi/abs/1... https://www.tandfonline.com/doi/abs/1... https://ri.conicet.gov.ar/handle/1133... https://www.researchgate.net/profile/... https://pure-oai.bham.ac.uk/ws/portal... https://www.researchgate.net/publicat... https://www.researchgate.net/publicat... https://www.ncbi.nlm.nih.gov/pmc/arti... https://www.researchgate.net/publicat... https://www.researchgate.net/profile/... https://www.nature.com/articles/srep2... https://www.sciencedirect.com/science... https://www.researchgate.net/publicat... 00:00 - Introduction 01:45 - Discovery and Location 03:17 - Classification 05:57 - Size 07:05 - Skull 11:16 - Body 12:26 - Bone Histology and Growth 14:33 - Did Cynognathus Have Fur? 16:13 - Age 21:28 - Paleoenvironment 26:27 - Conclusion 27:35 - Outro