Arambourgia Temporal range: Late Eocene, | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauria |
Order: | Crocodilia |
Family: | Alligatoridae |
Subfamily: | Alligatorinae |
Genus: | † Arambourgia Kälin, 1940 |
Type species | |
†Allognathosuchus gaudryi de Stefano, 1905 |
Arambourgia is an extinct monotypic genus of alligatorine crocodylian from Europe. It was named in 1905 as Allognathosuchus gaudryi. It was made a separate genus Arambourgia in 1940. This was synonymized with Allognathosuchus haupti in 1990 [2] (now known as Hassiacosuchus haupti ), but later reassigned as its own genus once again in 2004. [3] 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 cladograms below. [4] [5] [6]
Cladogram from 2018 Bona et al. study: [4]
Alligatorinae |
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Cladogram from 2019 Massonne et al. study: [5]
Alligatorinae |
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Cladogram from 2020 Cossette & Brochu study: [6]
Alligatorinae |
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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. [7]