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{{Short description|Extinct genus of reptiles}}
{{Automatic taxobox
| taxon = Navajosuchus
| fossil_range = [[Paleocene]], {{fossilrange|64|61.6|ref=<ref name="Rio2021">{{cite journal |last1=Rio |first1=Jonathan P. |last2=Mannion |first2=Philip D. |date=6 September 2021 |title=Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem |journal=[[PeerJ]] |volume=9 |pages=e12094 |doi=10.7717/peerj.12094 |pmid=34567843 |pmc=8428266 |doi-access=free}}</ref>}}
| image = Navajosuchus sp.jpg
| image_caption = ''Navajosuchus'' sp. in [[National Museum of Nature and Science]]
| authority = Mook, 1942
| type_species = {{extinct}}'''''Navajosuchus mooki'''''
| type_species_authority = ([[George Gaylord Simpson|Simpson]], 1930 [originally ''[[Allognathosuchus]] mooki''])
}}

'''''Navajosuchus''''' is an [[extinct]] [[genus]] of [[alligatorinae|alligatorine]] [[crocodylia]]n. Its fossils have been found in the [[Paleocene]]-age [[Nacimiento Formation]] of the [[San Juan Basin]], [[New Mexico]] ([[United States]]). It was named in 1942 by Charles C. Mook, and the original [[type species]] was ''N. novomexicanus''. ''N. novomexicanus'' was [[holotype|based on]] [[American Museum of Natural History|AMNH]] 5186, a partial skull collected in 1913.<ref name=CCM42>{{cite journal |last=Mook |first=Charles C. |year=1942 |title=A new fossil crocodilian from the Paleocene of New Mexico |journal=American Museum Novitates |issue=1189 |pages=1–4 |url=http://digitallibrary.amnh.org/dspace/bitstream/2246/2274/1/N1189.pdf }}</ref> Later research showed that ''Navajosuchus novomexicanus'' was the same as the earlier-named ''[[Allognathosuchus]] mooki''.<ref name=RMSetal86>{{cite journal |last=Sullivan |first=R.M. |author2=Lucas, S.G. |author3= Tsentas, C. |year=1988 |title=''Navajosuchus'' is ''Allognathosuchus'' |journal=Journal of Herpetology |volume=22 |issue=1 |pages=121–125 |doi=10.2307/1564367 |jstor=1564367}}</ref> However, ''A. mooki'' does not belong to the genus ''Allognathosuchus'', and so the name of the crocodilian becomes ''Navajosuchus mooki''.<ref name=CAB04>{{cite journal |last=Brochu |first=Christopher A. |year=2004 |title=Alligatorine phylogeny and the status of ''Allognathosuchus'' Mook, 1921 |journal=Journal of Vertebrate Paleontology |volume=24 |issue=4 |pages=857–873 |doi=10.1671/0272-4634(2004)024[0857:APATSO]2.0.CO;2|s2cid=85050852 }}</ref> Under whichever name is used, this animal would have been a generalized predator of the Nacimiento [[floodplain]]s. It was the most common Nacimiento Formation crocodilian, found in both the [[Puercan]] and [[Torrejonian]] faunal assemblages.<ref name=SGL92>{{cite book|last=Lucas |first=S.G. |title=San Juan Basin IV |editor=Lucas, S.G. |editor2=Kues, B.S. |editor3=Williamson, T.E. |editor4=Hunt, A.P. |publisher=New Mexico Geological Society|location=Socorro, New Mexico|year=1992|series=New Mexico Geological Society Guidebook|volume=43|pages=257–264|chapter=Cretaceous-Eocene crocodilians from the San Juan Basin, New Mexico |isbn=99922-2-673-0}}</ref>

The precise placement of ''Navajosuchus'' within [[Alligatoroidea]] is disputed. Some studies have shown it as a [[basal (phylogenetics)|basal]] member of [[Alligatoridae]], within the [[stem-based taxon|stem-based group]] [[Alligatorinae]],<ref name=Bona2018>{{Cite journal|author1=Paula Bona |author2=Martín D. Ezcurra |author3=Francisco Barrios |author4=María V. Fernandez Blanco |year=2018 |title=A new Palaeocene crocodylian from southern Argentina sheds light on the early history of caimanines |journal=Proceedings of the Royal Society B: Biological Sciences |volume=285 |issue=1885 |pages=20180843 |doi=10.1098/rspb.2018.0843 |pmid=30135152 |pmc=6125902 }}</ref><ref name="Cossette2020">{{Cite journal|author1=Adam P. Cossette |author2=Christopher A. Brochu |year=2020 |title=A systematic review of the giant alligatoroid ''Deinosuchus'' from the Campanian of North America and its implications for the relationships at the root of Crocodylia |journal=Journal of Vertebrate Paleontology |volume=40 |issue=1 |pages=e1767638 |doi=10.1080/02724634.2020.1767638 |bibcode=2020JVPal..40E7638C |doi-access=free }}</ref> as shown in the [[cladogram]] below.<ref name="Cossette2020"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Alligatoroidea]]'''
|sublabel1=([[stem-based taxon|stem-based group]])
|1={{clade
|1=''[[Leidyosuchus]]''{{extinct}}
|2=''[[Deinosuchus]]''{{extinct}}
|label3=[[Diplocynodontinae]]{{extinct}}
|3=''[[Diplocynodon]]''{{extinct}}
|label4='''[[Alligatoridae]]'''
|sublabel4=([[crown group]])
|4={{clade
|1=[[Caimaninae]] ([[stem-based taxon|stem-based group]])
|label2=[[Alligatorinae]]
|sublabel2=([[stem-based taxon|stem-based group]])
|2={{clade
|1=''[[Ceratosuchus]]''{{extinct}}
|2=''[[Hassiacosuchus]]''{{extinct}}
|3='''''Navajosuchus'''''{{extinct}}
|4={{clade
|1=''[[Allognathosuchus]]''{{extinct}}
|2={{clade
|1=''[[Alligator mcgrewi]]''{{extinct}}
|2=''[[Alligator prenasalis]]''{{extinct}} }}
|3={{clade
|1=''[[Wannaganosuchus]]''{{extinct}}
|2={{clade
|1={{clade
|1=''[[Arambourgia]]''{{extinct}}
|2=''[[Procaimanoidea]]''{{extinct}} }}
|2={{clade
|1=''[[Alligator olseni]]''{{extinct}}
|2=[[crown group|crown]] Alligatorinae }} }} }} }} }} }} }} }}

Alternatively, other studies have recovered ''Navajosuchus'' outside of [[Alligatoridae]] and [[Alligatorinae]], as a [[basal (phylogenetics)|basal]] member of [[Alligatoroidea]] within the [[clade]] [[Globidonta]],<ref name="LeeYates2018">{{cite journal | author=Michael S. Y. Lee |author2=Adam M. Yates |date=27 June 2018 |title=Tip-dating and homoplasy: reconciling the shallow molecular divergences of modern gharials with their long fossil |journal=[[Proceedings of the Royal Society B]] |volume=285 |issue=1881 |doi=10.1098/rspb.2018.1071 |pmid=30051855 |pmc=6030529 |doi-access=free}}</ref><ref name="Massonne2019">{{cite journal |author1=Tobias Massonne |author2=Davit Vasilyan |author3=Márton Rabi |author4=Madelaine Böhme |year=2019 |title=A new alligatoroid from the Eocene of Vietnam highlights an extinct Asian clade independent from extant ''Alligator sinensis'' |journal=PeerJ |volume=7 |pages=e7562 |doi=10.7717/peerj.7562 |pmid=31720094 |pmc=6839522 |doi-access=free }}</ref> as shown in the [[cladogram]] below.<ref name="Massonne2019"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Alligatoroidea]]'''
|1={{clade
|1=[[Diplocynodontinae]]{{extinct}}
|label2=[[Globidonta]]
|2={{clade
|1=''[[Leidyosuchus]]''{{extinct}}
|2={{clade
|1=''[[Deinosuchus]]''{{extinct}}
|2={{clade
|1={{clade
|1='''''Navajosuchus'''''{{extinct}}
|2=''[[Ceratosuchus]]''{{extinct}}
|3={{clade
|1=''[[Stangerochampsa]]''{{extinct}}
|2={{clade
|1=''[[Brachychampsa sealeyi]]''{{extinct}}
|2={{clade
|1=''[[Brachychampsa montana]]''{{extinct}}
|label2=[[Orientalosuchina]]{{extinct}}
|2={{clade
|1=''[[Eoalligator]]''{{extinct}}
|2=''[[Jiangxisuchus]]''{{extinct}}
|3=''[[Protoalligator]]''{{extinct}}
|4={{clade
|1=''[[Orientalosuchus]]''{{extinct}}
|2=''[[Krabisuchus]]''{{extinct}} }} }} }} }} }} }}
|label2='''[[Alligatoridae]]'''
|2={{clade
|1=[[Alligatorinae]]
|2=[[Caimaninae]] }} }} }} }} }} }}

==References==
{{Reflist}}

{{Portal|Paleontology}}

{{Extinct Crocodilia|A.}}
{{Taxonbar|from=Q16986229}}

[[Category:Alligatorinae]]
[[Category:Paleocene crocodylomorphs]]
[[Category:Paleocene reptiles of North America]]
[[Category:Prehistoric pseudosuchian genera]]
[[Category:Fossil taxa described in 1942]]
[[Category:Paleontology in New Mexico]]

Navajosuchus - Revision history

imported>A Cynical Idealist: Removed stub tag