Name: Angistorhinus ‭(‬narrow snout‭)‬.
Phonetic: An-jis-to-ry-nus.
Named By: M.‭ ‬G.‭ ‬Mehl‭ ‬-‭ ‬1913.
Classification: Chordata,‭ ‬Phytosauria,‭ ‬Phytosauridae.
Species: A.‭ ‬grandis‭ (‬type‭)‬,‭ ‬A.‭ ‬talainti‭?
Diet: Carnivore/Piscivore.
Size: Skull of A.‭ ‬grandis about‭ ‬120‭ ‬centimetres long.
Known locations: USA,‭ ‬Arizona‭ ‬-‭ ‬Chinle Formation,‭ ‬New Mexico‭ ‬-‭ ‬Santa Rosa Formation,‭ ‬Texas‭ ‬-‭ ‬Colorado City Formation and Wyoming‭ ‬-‭ ‬Popo Agie Formation.‭ ‬Possibly Morocco.
Time period: Norian/Rhaetian of the Triassic.
Fossil representation: Several individuals mostly known from skulls,‭ ‬but some post cranial remains also known.

       With skulls measuring about one hundred and twenty centimetres long,‭ ‬Angistorhinus was easily amongst the largest phytosaurs,‭ ‬crocodile-like reptiles that hunted in Triassic waterways.‭ ‬The jaws of Angistorhinus were long and thin,‭ ‬more akin to those of a gharial,‭ ‬perhaps indicating that Angistorhinus was more of a fish hunter.‭ ‬The nostrils of Angistorhinus were situated further‭ ‬back on the skull,‭ ‬a feature that is not just indicative of a more advanced phytosaur form,‭ ‬but also kept the nostrils free from the water when the snout was dipped underneath.
       Angistorhinus has in the past been considered as a synonym to the genus Rutiodon,‭ ‬but later studies have continued to retain Angistorhinus as a distinct genus.‭ ‬One sometimes mentioned species of Angistorhinus,‭ ‬A.‭ ‬megalodon,‭ ‬is more often credited as the genus Brachysuchus.‭ ‬Fossils from Morocco have been tentatively place in the genus as a new species,‭ ‬A.‭ ‬talainti.

Further reading
-‭ ‬Angistorhinus,‭ ‬a new genus of Phytosauria from the Trias of Wyoming.‭ ‬-‭ ‬Journal of Geology‭ ‬21:186-191.‭ ‬-‭ ‬M.‭ ‬G.‭ ‬Mehl‭ ‬-‭ ‬1913.
-‭ ‬Description du craˆne de Angistorhinus talainti n.‭ ‬sp.‭ ‬un nouveau Phytosaure du Trais atlasique marocain.‭ ‬-‭ ‬Bulletin du Muséum National d'Histoire Naturelle‭ ‬3‭ (‬489‭)‬:‭ ‬297‭–‬336.‭ ‬-‭ ‬J.‭ ‬-M.‭ ‬Dutuit‭ ‬-‭ ‬1977.
-‭ ‬Status and phylogenetic relationships of the Late Triassic phytosaur Rutiodon carolinensis.‭ ‬-‭ ‬Journal of Vertebrate Paleontology‭ ‬21‭ (‬3‭ ‬Suppl.‭)‬:‭ ‬64A.‭ ‬-‭ ‬A.‭ ‬Hungerbühler‭ ‬-‭ & ‬H.‭ ‬-D.‭ ‬Sues‭ ‬-‭ ‬2001.
-‭ ‬Postcranial anatomy of Angistorhinus,‭ ‬a Late Triassic phytosaur from West Texas.‭ ‬-‭ ‬S.‭ ‬G.‭ ‬Lucas,‭ ‬A.‭ ‬B.‭ ‬Heckert‭ & ‬R.‭ ‬Kahle‭ ‬-‭ ‬2002.‭ ‬In Upper Triassic Stratigraphy and Paleontology,‭ ‬New Mexico Museum of Natural History and Science Bulletin‭ ‬21:‭ ‬157‭–‬164‭ (‬A.‭ ‬B.‭ ‬Heckert,‭ ‬S.‭ ‬G.‭ ‬Lucas‭ ‬-‭ ‬eds‭)‬.‭ ‬2002.‭
-‭ ‬A new taxon of phytosaur‭ (‬Archosauria:‭ ‬Pseudosuchia‭) ‬from the Late Triassic‭ (‬Norian‭) ‬Sonsela Member‭ (‬Chinle Formation‭) ‬in Arizona,‭ ‬and a critical re-evaluation of Leptosuchus Case,‭ ‬1922.‭ ‬-‭ ‬Palaeontology‭ ‬53‭ (‬5‭)‬:‭ ‬997‭–‬1022.‭ ‬-‭ ‬Michelle R.‭ ‬Stocker‭ ‬-‭ ‬2010.


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