Azendohsaurus

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Azendohsaurus
Temporal range: Late Triassic
Azendohsaurus laaroussii.jpg
A. laaroussi jaw with teeth
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Infraclass: Archosauromorpha
Genus: Azendohsaurus
Dutuit, 1972
Species
  • A. laaroussi Dutuit, 1972 (type)
  • A. madagaskarensis Flynn et al., 2010

Azendohsaurus (meaning "Azendoh lizard") was a genus of herbivorous archosauromorph from the Late Triassic Period of Morocco. The type species (A. laaroussi) is known only from a partial jaw fragment (with some teeth) from Morocco. Azendohsaurus was previously regarded as a dinosaur, as either an ornithischian or a prosauropod.[1][2] New research (including new material discovered in Madagascar) suggests that Azendohsaurus is not a dinosaur at all, but a non-archosauriform archosauromorph that independently evolved many craniodental characters similar to herbivorous dinosaurs.[3]

The type specimen, A. laaroussi, was described by J. M. Dutuit in 1972. A second species, A. madagaskarensis, was described in 2010. A. laaroussi is known only from teeth and jaws, which have derived features of several dinosaur groups, such as a leaf-like shape and denticles.[3] However, A. madagaskarensis is known from more complete skeletal material, some of which show more basal archosauromorph characteristics.

References[edit]

  1. ^ Irmis, R.B.; Parker, W.G.; Nesbitt, S.J.; Liu, J. (2007). "Early ornithischian dinosaurs: the Triassic record". Historical Biology 19 (1): 3–22. doi:10.1080/08912960600719988. 
  2. ^ Flynn, J.; Nesbitt, S.; Parrish, M.; Ranivoharimanana, L.; Wyss, A. (2008). "A new species of basal archosauromorph from the Late Triassic of Madagascar". Journal of Vertebrate Paleontology. Suppl. 28: 78A. 
  3. ^ a b Flynn, J.J.; Nesbitt, S.J.; Parrish, J.M.; Ranivoharimanana, L.; Wyss, A.R. (2010). "A new species of Azendohsaurus (Diapsida: Archosauromorpha) from the Triassic Isalo Group of southwestern Madagascar: cranium and mandible". Palaeontology 53 (3): 669–688. doi:10.1111/j.1475-4983.2010.00954.x.