Aegisuchus

All Noun
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  • Info Aegisuchus is an extinct genus of giant, flat-headed crocodyliform within the family Aegyptosuchidae. more...
  • Aegisuchus probably had eyes that faced directly upward, with no raised ridges surrounding the sockets.
  • Vascularization is not seen in any other crocodilian, and may have been unique to Aegisuchus.
  • With a long flattened snout, Aegisuchus would have had great difficulty in raising its head and opening its mouth if it did not have large neck muscles.
  • Aegisuchus has a very flexible articulation between the skull and vertebral column, allowing a greater degree of skull elevation than other crocodilians.
  • As a "duck-faced" crocodyliform, Aegisuchus may have had a longer snout relative to body length than living crocodylians.
  • Based on the ratio of braincase to skull length in other crocodilians, the total skull length of Aegisuchus is estimated to have been in length.
  • However, the presence of agyptosuchids such as Aegisuchus in northern Africa suggests that early crocodilian evolution was focused instead around the Tethys Ocean.
  • As an opportunistic predator, Aegisuchus may also have preyed on land vertebrates such as reptiles.
  • The family includes two genera, Aegyptosuchus and Aegisuchus.
  • At 40 cubic centimetres, the braincase of Aegisuchus is much larger in volume than that of any other crocodyliform.
  • The adductor muscles that close the jaw shifted to a more vertical orientation in Aegisuchus.
  • Modern crocodilians raise their heads out of the water as a social signal in mating displays; as a close relative of crocodilians, Aegisuchus likely had similar mating rituals.
  • The flattened skull of Aegisuchus required significant alteration to jaw muscles.
  • The flattened shape of the skull of Aegisuchus suggests that it was an ambush predator resting at the surface of the water.
  • With its flattened skull, Aegisuchus was probably an ambush predator.
  • A similar ratio between braincase and body length puts Aegisuchus at long when based on the proportions of long-snouted gharials, or long when based on the proportions of short-snouted crocodiles.
  • Aegisuchus was almost certainly not this long, for it would be much longer than the largest of crocodilians, including Deinosuchus, Gryposuchus, Purussaurus, and Sarcosuchus.
  • Stomatosuchids are also known from the Kem Kem Beds, and probably shared a close ecological niche with Aegisuchus as river predators.
  • Aegisuchus lived within this delta alongside fishes, turtles, snakes and varanid lizards, pterosaurs, and sauropod and theropod dinosaurs.