imported>OAbot: Open access bot: url-access updated in citation with #oabot.

2025-05-28T17:27:52Z

Open access bot: url-access updated in citation with #oabot.

New page

{{Short description|Extinct genus of reptiles}}
{{confused|Arambourgiania}}
{{Automatic taxobox
| image =Arambourgia_gaudryi.png
| fossil_range = [[Late Eocene]], {{fossil range|37.8|33.9|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>}}
| taxon = Arambourgia
| authority = Kälin, 1940
| type_species = {{extinct}}'''''Allognathosuchus gaudryi'''''
| type_species_authority = de Stefano, 1905
}}
'''''Arambourgia''''' is an [[extinct]] [[monotypic]] [[genus]] of [[Alligatorinae|alligatorine]] [[crocodylia]]n from [[Europe]]. It was named in 1905 as ''Allognathosuchus gaudryi''. It was made a separate genus ''Arambourgia'' in 1940. This was [[Synonym (taxonomy)|synonymized]] with ''[[Allognathosuchus|Allognathosuchus haupti]]'' in 1990<ref>{{cite journal | last1 = Rauhe | first1 = M. | year = 1990 | title = Habit-Habitus-Wechselbeziehung von Allognathosuchus gaudryi Stefano 1905 (=Allognathosuchus haupti Weitzel 1935) | journal = Geologisches Jahrbuch Hessen | volume = 118 | pages = 53–61 }}</ref> (now known as ''[[Hassiacosuchus haupti]]''), but later reassigned as its own genus once again in 2004.<ref>{{cite journal | doi = 10.1671/0272-4634(2004)024[0857:APATSO]2.0.CO;2 | last1 = Brochu | first1 = 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 | s2cid = 85050852 }}</ref> ''Arambourgia'' was likely to have been part of an early dispersal event of alligatorines from [[North America]] to Europe during the [[Eocene]] epoch. ''Arambourgia'' had non-serrated teeth and a deep [[orienirostral]] snout, unlike the flatter snouts of most other alligatorids.

Recent studies have consistently resolved ''Arambourgia'' as a member of [[Alligatorinae]], although its relative placement is disputed, as shown by the [[cladogram]]s below.<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="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><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>

Cladogram from 2018 Bona ''et al.'' study:<ref name="Bona2018"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Alligatorinae]]'''
|1={{clade
|1=''[[Ceratosuchus burdoshi]]''{{extinct}}
|2=''[[Allognathosuchus polyodon]]''{{extinct}}
|3=''[[Allognathosuchus wartheni]]''{{extinct}}
|4=''[[Navajosuchus mooki]]''{{extinct}}
|5='''''Arambourgia gaudryi'''''{{extinct}}
|6={{clade
|1=''[[Procaimanoidea kayi]]''{{extinct}}
|2=''[[Procaimanoidea utahensis]]''{{extinct}} }}
|7={{clade
|1=''[[Wannaganosuchus brachymanus]]''{{extinct}}
|2={{clade
|1=''[[Alligator prenasalis]]''{{extinct}}
|2={{clade
|1=''[[Alligator mcgrewi]]''{{extinct}}
|2={{clade
|1=''[[Alligator olseni]]''{{extinct}}
|2={{clade
|1=''Alligator sinensis'' [[Chinese alligator]]
|2={{clade
|1=''[[Culebrasuchus mesoamericanus]]''{{extinct}}
|2={{clade
|1=''Alligator mississippiensis'' [[American alligator]]
|2=''[[Alligator mefferdi]]''{{extinct}}
|3=''[[Alligator thomsoni]]''{{extinct}} }} }} }} }} }} }} }} }} }}

Cladogram from 2019 Massonne ''et al.'' study:<ref name="Massonne2019"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Alligatorinae]]'''
|1={{clade
|1={{clade
|1=''[[Alligator prenasalis]]''{{extinct}}
|2=''[[Alligator mcgrewi]]''{{extinct}} }}
|2={{clade
|1={{clade
|1=''[[Alligator olseni]]''{{extinct}}
|2={{clade
|1=''Alligator sinensis'' [[Chinese alligator]]
|2={{clade
|1=''[[Alligator thomsoni]]''{{extinct}}
|2=''[[Alligator mefferdi]]''{{extinct}}
|3=''Alligator mississippiensis'' [[American alligator]] }} }} }}
|2={{clade
|1={{clade
|1=''[[Procaimanoidea utahensis]]''{{extinct}}
|2=''[[Procaimanoidea kayi]]''{{extinct}} }}
|2={{clade
|1='''''Arambourgia gaudryi'''''{{extinct}}
|2={{clade
|1=''[[Hassiacosuchus haupti]]''{{extinct}}
|2={{clade
|1=''[[Wannaganosuchus brachymanus]]''{{extinct}}
|2={{clade
|1=''[[Allognathosuchus wartheni]]''{{extinct}}
|2=''[[Allognathosuchus polyodon]]''{{extinct}} }} }} }} }} }} }} }} }}

Cladogram from 2020 Cossette & Brochu study:<ref name="Cossette2020"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Alligatorinae]]'''
|1={{clade
|1=''[[Ceratosuchus burdoshi]]''{{extinct}}
|2=''[[Hassiacosuchus haupti]]''{{extinct}}
|3=''[[Navajosuchus mooki]]''{{extinct}}
|4={{clade
|1=''[[Allognathosuchus polyodon]]''{{extinct}}
|2={{clade
|1=''[[Alligator mcgrewi]]''{{extinct}}
|2=''[[Alligator prenasalis]]''{{extinct}} }}
|3={{clade
|1=''[[Wannaganosuchus brachymanus]]''{{extinct}}
|2={{clade
|1={{clade
|1='''''Arambourgia gaudryi'''''{{extinct}}
|2={{clade
|1=''[[Procaimanoidea kayi]]''{{extinct}}
|2=''[[Procaimanoidea utahensis]]''{{extinct}} }} }}
|2={{clade
|1=''[[Alligator olseni]]''{{extinct}}
|2={{clade
|1=''Alligator sinensis'' [[Chinese alligator]]
|2={{clade
|1=''Alligator mississippiensis'' [[American alligator]]
|2=''[[Alligator mefferdi]]''{{extinct}}
|3=''[[Alligator thomsoni]]''{{extinct}} }} }} }} }} }} }} }} }}

== Palaeoecology ==
Based on its unusual anatomy and it having been found in karstic settings, ''A. gaudryi'' occupied an ecological niche analogous to present-day juvenile and dwarf crocodylians.<ref>{{Cite journal |last=Conedera |first=Davide |last2=Pochat-Cottilloux |first2=Yohan |last3=Rinder |first3=Nicolas |last4=Adrien |first4=Jerôme |last5=Martin |first5=Jeremy E. |date=4 July 2023 |title=An anatomical reappraisal of the dwarf crocodylian Arambourgia gaudryi from the Eocene of Quercy (France) using CT data and its implications for the phylogeny and paleoecology of basally branching alligatoroids |url=https://www.tandfonline.com/doi/full/10.1080/02724634.2024.2313612 |journal=[[Journal of Vertebrate Paleontology]] |language=en |volume=43 |issue=4 |doi=10.1080/02724634.2024.2313612 |issn=0272-4634 |access-date=9 December 2024 |via=Taylor and Francis Online|url-access=subscription }}</ref>

==References==
{{Reflist}}

{{Extinct Crocodilia|A.}}
{{Taxonbar|from=Q3621257}}

[[Category:Alligatorinae]]
[[Category:Fossil taxa described in 1940]]
[[Category:Eocene crocodylomorphs]]
[[Category:Eocene reptiles of Europe]]
[[Category:Prehistoric pseudosuchian genera]]

Arambourgia - Revision history

imported>OAbot: Open access bot: url-access updated in citation with #oabot.