Pseudosuchia An Overview Of The Prehistoric Relatives Of Crocodilians

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Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal definition lays a once dynamic and diverse group reptiles that were far more than simply minor variations of today's crocodilians. Pseudosuchia is one of the two branches of the clade Archosauria, the ruling reptiles. This is the same clade that contained the dinosaurs, and pseudosuchians possessed many of the same traits that made their more famous cousins so successful. Indeed, during the Triassic Period, it was not dinosaurs but the pseudosuchians who were the dominant megafauna. Afterwards, they remained the most persistent competitors of the dinosaurs. • Pseudosuchia included small, pug-nosed plant-eaters, large tank-like species, species which became fully aquatic, as well as the largest terrestrial predators to terrorize the Earth after the demise of the dinosaurs. Even the semi-aquatic crocodile-like species were highly diverse, including specialized mollusk crushers, dedicated plant-eaters, and even bus-sized species able to match the largest carnivorous dinosaurs. Despite their former diversity and evolutionary success, most prehistoric pseudosuchians remain obscure compared to dinosaurs or pterosaurs. • This video aims to help change that by providing an overview of Pseudosuchia, the other half of the fascinating success story that was Archosauria. The first half of the video covers a range of subject related to the clade, ranging from their metabolisms to evolutionary trends in their skulls and limbs. The second half of the video provides a synopsis of each major pseudosuchian subclade and a number of individual species of note, as well as providing a basic idea of how all these reptiles (including modern crocodilians) fit together. • Thank you to the themattalorian for narrating this video and to Armin Reindl for narrating the script. • • 00:00 - Introduction • 03:23 - Origin • 05:26 - Classification • 08:20 - Modern Crocodilian Diversity • 09:41 - Etymology • 13:15 - Evolutionary History • 15:55 - Modern Crocodilian Ecologies • 17:24 - Diets and Teeth • 20:26 - Skulls • 24:26 - Limbs • 29:28 - Metabolism • 32:24 - Integument • 37:03 - Reproduction • 38:52 - Imposter Crocodiles • 41:02 - Phytosaurs: Crocodilian Mimics • 43:43 - Basal Pseudosuchians • 45:30 - Ornithosuchidae: Big-Headed Carnivores • 47:06 - Aetosaurs: Tank Crocs • 49:00 - Poposauroidea: Ragtag Misfits • 52:43 - Loricata and the Rauisuchians: The Top Triassic Predators • 56:36 - Basal Crocodylomorphs • 58:36 - Protosuchians: The Next Stage • 1:01:02 - Thalattosuchia: Sea Crocodiles • 1:05:39 - Notosuchia: The Pseudosuchian Resurgence • 1:16:22 - Neosuchia: The Almost-Crocodiles • 1:25:00 - True Crocodilians • 1:33:01 - Mekosuchinae: The Australian Crocodilians • 1:35:34 - Conclusion • 1:39:10 - Outro

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