Leptorhynchos gaddisi

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Temporal range: Late Cretaceous,
80.5–72 Ma
Leptorhynchos by Nick Longrich.jpg
Life reconstruction of L. gaddisi
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: Caenagnathidae
Subfamily: Elmisaurinae
Genus: Leptorhynchos
Longrich et al., 2013
Type species
Leptorhynchos gaddisi
Longrich et al., 2013[1]

Leptorhynchos (meaning "slender beak") is an extinct genus of caenagnathid dinosaurs known from the Late Cretaceous (Campanian-Maastrichtian aged) Aguja Formation of west Texas United States.[1][2] It lived about 80.5–72 million years ago. It is distinguished from its relatives Chirostenotes and Anzu by its smaller size, and by a more strongly upturned mandible, similar to that of oviraptorids. The specializations of the beak in Leptorhynchos and other caenagnathids suggest that they were herbivores. The species L. elegans has since been transferred to the genus Citipes,[3] leaving only the type species L. gaddisi in the genus.[1]

Leptorhynchos has been placed in the Elmisaurinae.[4][5]

See also[edit]


  1. ^ a b c Longrich, N. R.; Barnes, K.; Clark, S.; Millar, L. (2013). "Caenagnathidae from the Upper Campanian Aguja Formation of West Texas, and a Revision of the Caenagnathinae". Bulletin of the Peabody Museum of Natural History. 54: 23–49. doi:10.3374/014.054.0102. S2CID 128444961.
  2. ^ Nicholas R. Longrich, Ken Barnes, Scott Clark and Larry Millar (2013) Correction to "Caenagnathidae from the Upper Campanian Aguja Formation of West Texas, and a Revision of the Caenagnathinae".
  3. ^ Funston, Gregory (2020-07-27). "Caenagnathids of the Dinosaur Park Formation (Campanian) of Alberta, Canada: anatomy, osteohistology, taxonomy, and evolution". Vertebrate Anatomy Morphology Palaeontology. 8: 105–153. doi:10.18435/vamp29362. ISSN 2292-1389.
  4. ^ D. J. Varricchio. (2001). Late Cretaceous oviraptorosaur (Theropoda) dinosaurs from Montana. D. H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life, Indiana University Press, Bloomington
  5. ^ Currie, Philip; Funston, Gregory; Osmolska, Halszka (2015). "New specimens of the crested theropod dinosaur Elmisaurus rarus from Mongolia". Acta Palaeontologica Polonica. doi:10.4202/app.00130.2014.