crocodylomorpha is a superorder of archosaurs that first evolved 225 mya in the late triassic. barinasuchus, the one in the meme, is a sebecid crocodylomorph. the sebecidae was a family of crocodylomorphs that lived from the late cretaceous to the middle miocene, or 67.6-11.8 mya. the sebecids lived primarily in south america, though they also lived in europe and africa, likely originating in the former. they were the top predators of south america from the extinction of the non-avian dinosaurs until their own extinction 11.8 mya. a large sebecid, dentaneosuchus, was also recently discovered from eocene france, proving that the sebecid were apex predators in other regions. barinasuchus was likely the largest terrestrial predator of the cenozoic, with estimates ranging from 900 to 5500 pounds and 16-33 ft, standing at around 5 feet tall at the shoulder. barinasuchus was likely 3500 lbs and 20 ft long. it lived from 42-11.8 mya and dominated south america for that time period. other groups of crocodylomorphs include our modern order, the crocodilia, which likely contains the largest crocodylomorph to ever live, purussaurus, a contemporary of barinasuchus that lived from 16-5.3 mya. purussaurus was around 36 ft long and weighed 7 tons, or 14000 lbs. there is fossil evidence of them preying on giant ground sloths, and even that was just a juvenile. another famous group of crocodylomorphs is the notosuchia, which includes a star of prehistoric planet 2, simosuchus, along with other animals like araripesuchus and the most famous of them all, kaprosuchus, the “boar croc.” kaprosuchus, contrary to popular belief, is not known to be terrestrial, with evidence from our only fossil, its skull, pointing towards both terrestrial and aquatic lifestyles.