Genus
Valid Extinct

Leptorhynchos

Longrich et al. 2013

Leptorhynchos is an extinct genus of caenagnathid theropod from the Late Cretaceous of what is now the US state of Texas, although it has been suggested to also exist in Alberta and South Dakota. The type species is L. gaddisi, and it is currently the only widely accepted valid species. The generic name of Leptorhynchos comes from the Greek "leptos" meaning "small" and "rhynchos" meaning "beak". The specific epithet is in honor of the Gaddis family, who owned the land on which the holotype was discovered.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
10
Group
Dinosaures
Omnivore Ground dwelling (surface) Terrestrial
Leptorhynchos
click to enlarge
Leptorhynchos, a small caenagnathid from the Campanian of Western North America. Original work in pencil and charcoal by Nick Longrich. Additional digital editing in Adobe Photoshop by Nick Longrich. © NickLongrich · CC BY-SA 4.0 · Wikimedia
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PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Theropoda Unranked clade
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Neotheropoda Unranked clade
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Averostra Unranked clade
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Tetanurae Unranked clade
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Coelurosauria Unranked clade
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Maniraptora Unranked clade
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Oviraptorosauria Infraorder
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Caenagnathidae Family
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Leptorhynchos Genus
Fossil sites 10 geolocated sites
Distribution
Top countries
🇨🇦 Canada
7
🇺🇸 United States
3
Geological formations
Dinosaur Park
5
Aguja
2
Frenchman
2
Two Medicine
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
2
Campanian (83.6–72.2 Ma)
8
Species (2)
Leptorhynchos elegans 84 Ma
Leptorhynchos gaddisi 84 Ma
Images 12
Bibliography
Original description
N. R. Longrich, K. Barnes, and S. Clark, L. Millar. 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(1):23-49 DOI ↗
Bibliography (2)
G. F. Funston, P. J. Currie, and M. E. Burns. 2016. New elmisaurine specimens from North America and their relationship to the Mongolian Elmisaurus rarus. Acta Palaeontologica Polonica 61(1):159-173 DOI ↗
N. R. Longrich, K. Barnes, and S. Clark, L. Millar. 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(1):23-49 DOI ↗