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Barinasuchus was a crocodilian from the Sebecidae family which are a group of terrestrial crocodylomorphs. Barinasuchus was the largest terrestrial carnivore following the extinction of the dinosaurs. It reached lengths up to 7.5 meters and weighed over 1,700 kilograms. It terrorized the Mid-Eocene to the Mid-Miocene for over 30 million years.
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Barinasuchus was described in 2007 by Alfredo Paolillo and Omar Linares. The holotype comes from the rocks of the Parángula Formation, located in Barinas, Venezuela and consists of an incomplete, articulated skull. Like other sebecosuchians, it was a terrestrial carnivore equipped with ziphodont teeth, remarkably similar to those of theropods, which are compressed laterally, curved facing backwards, and with serrated borders. This dentition made it a formidable predator.
The preserved parts of the holotype consist of a skull that is 70 centimeters in length and 40 centimeters in height. Based on this, it is estimated that the total skull length was between 95 and 115 centimeters. The total length of the animal is estimated to be close to 6 m (20 ft) based on more complete sebecosuchians like Stratiotosuchus or nearly 7.5 m (25 ft) based on the modern Crocodylus porosus, making Barinasuchus the largest known sebecid. Without more complete remains, it is difficult to estimate its possible weight; however, based in the lengths of Stratiosuchus mexhechti and Crocodylus porosus, it has been estimated that Barinasuchus weighed around 1,610 and 1,720 kilograms respectively. This implies a superior weight than any of the large carnivoran mammals, and even considering a margin error of 50%, would still make it larger than any terrestrial mammalian predator of the Cenozoic.