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Temporal range: Kimmeridgian-early Tithonian, 157.3–152.3 Ma
Alligatorium meyeri 654.JPG
A. meyeri fossil
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Atoposauridae
Genus: Alligatorium
Gervais, 1871
  • A. meyeri Gervais, 1871 (type)

Alligatorium is an extinct genus of atoposaurid crocodylomorph from Late Jurassic marine deposits in France.


The type species is A. meyeri, named in 1871 from a single specimen from Cerin, eastern France. Two more nominal species, A. franconicum, named in 1906, and A paintenense, named in 1961, are based on now-missing specimens from Bavaria, southern Germany, and were synonymized into a single species, for which A. franconium has priority.[1] A 2016 review of Atoposauridae removed A. franconium from Alligatorium and placed at Neosuchia incertae sedis.[2]

Alligatorium depereti, described in 1915, was reassigned to its own genus, Montsecosuchus, in 1988.[3]


  1. ^ Tennant, Jonathan P.; Mannion, Philip D. (2014). "Revision of the Late Jurassic crocodyliformAlligatorellus, and evidence for allopatric speciation driving high diversity in western European atoposaurids". PeerJ. 2: e599. doi:10.7717/peerj.599. ISSN 2167-8359. PMC 4179893Freely accessible. PMID 25279270. 
  2. ^ Tennant, Jonathan P.; Mannion, Philip D.; Upchurch, Paul (2016). "Evolutionary relationships and systematics of Atoposauridae (Crocodylomorpha: Neosuchia): implications for the rise of Eusuchia". Zoological Journal of the Linnean Society. 177 (4): 854–936. doi:10.1111/zoj.12400. ISSN 1096-3642. 
  3. ^ Buscalioni, A. D.; Sanz, J. L. (1988). "Phylogenetic relationships of the Atoposauridae". Historical Biology. 1 (3): 233–250. doi:10.1080/08912968809386477.