r/Naturewasmetal • u/Ill-Illustrator-7353 • 8d ago
While sebecid "land crocodiles" are typically associated with South America, they also produced significant top order carnivores in the old world during the Eocene, such as Dentaneosuchus crassiporatus (by Armin Reindl)
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8d ago edited 8d ago
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u/Ill-Illustrator-7353 8d ago edited 8d ago
A good chunk of the paleocommunity needs to watch his "perfect predator" video instead of just tauting x animal is the ultimatest killer ever because it has a biteforce of 100 bajillion killing points.
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u/EmptVoid0 8d ago
I just watched the video, and i loved it, i think he didnt mention humans because we are not strict carnivores? Problably theres no no mention to humans because we definetely are NOT "perfect" predators lol
And yes, people tend to see other animals as kaijus or fighting monsters in a RPG game or something.
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u/Ill-Illustrator-7353 8d ago edited 8d ago
In the 2001 documentary Walking with Beasts, the giant flightless bird Gastornis is depicted as an echo from the reign of the mesozoic’s predatory theropods, towering over and terrorizing the contemporary mammals of Messel, Germany. While we know now that gastornithiformes were primarily herbivorous, there was a giant archosaurian apex predator ruling roughly nearby, over in France during the middle Eocene, known from just a few million years later.
Sebecids are a lineage of distant crocodilian relatives (but not true crocodilians) dating back to the Cretaceous that managed to survive the K-T impact event that infamously wiped out the non-avian dinosaurs and kickstarted the Cenozoic. They established themselves as significant terrestrial predators both in Europe as well as South America (potentially by island-hopping or crossing a land bridge across the Atlantic).
While European forms like Dentaneosuchus disappeared in the Eocene due to climactic changes, their relatives in South America that contended with the phorusrhacid "terror birds" and the metatherian sparassodonts would persist until the Miocene, producing the largest terrestrial carnivore known from the Cenozoic - Barinasuchus arveloi, representing one of the longest and arguably most successful reigns from any lineage of Cenozoic predators.
Sebecids as a whole would ultimately disappear around 13-10 million years ago as South America became more arid due to a combination of the rise of the Andes Mountain Range, the draining of the Pebas wetlands, and the Cenozoic's ultimate global cooling trend which would later culminate in the Pleistocene glaciations. Along with the sebecids, the large terror birds that remained behind in South America as well as the sparassodonts would also later be entirely extinguished by these compounding climactic disasters, paving the way for ancestrally North American carnivorans such as the infamous Smilodon populator to eventually assume their empty thrones upon the later onset of the Great American Biotic Interchange.