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Temporal range: Bathonian, 167–164 Ma
Holotype of Razanandrongobe, showing teeth and associated maxillary fragment
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Branch: Sebecosuchia
Genus: Razanandrongobe
Maganuco et al., 2006
Type species
Razanandrongobe sakalavae
Maganuco et al., 2006

Razanandrongobe (meaning "large ancestor lizard" in Malagasy) is a genus of carnivorous sebecosuchian from the Middle Jurassic of Madagascar. It is based on MSNM V5770, a fragment of maxilla, the main tooth-bearing bone of the upper jaw, and several isolated teeth have also been assigned to it. The remains come from the Bathonian-age Isalo Illb rock unit of Mahajanga. The jaw fragment and teeth are similar to the representative bones of theropod dinosaurs and some types of crocodylomorphs, and the authors refrained from assigning the genus to either group. They interpreted the stout teeth as having been used for crushing bones, and their denticles are remarkably large, even larger then those of Tyrannosaurus.[1] Remains described in 2017 have given further insight to the phylogeny of R. sakalavae, revealing it to be the oldest known notosuchian.[2]


Discovery and naming[edit]





  1. ^ Maganuco, S.; Dal Sasso, C.; Pasini, G. (2006). "A new large predatory archosaur from the Middle Jurassic (Bathonian) of Madagascar, with remarks on its affinities and paleobiology". Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in Milano. 147 (1): 19–51. 
  2. ^ Dal Sasso, C.; Pasini, G.; Fleury, G.; Maganuco, S. (2017). "Razanandrongobe sakalavae, a gigantic mesoeucrocodylian from the Middle Jurassic of Madagascar, is the oldest known notosuchian". PeerJ. 5: e3481. doi:10.7717/peerj.3481. 

External links[edit]

  • Razanandrongobe sakalavae - Dinosaur Mailing List posting that announces the genus and includes the abstract of Maganuco et al.'s article.