Orientalosuchina

Orientalosuchina Temporal range: Maastrichtian-Eocene, 72–34 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Partial skull and jaw of Protoalligator huiningensis, on display at the Paleozoological Museum of China
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauromorpha
Clade:	Archosauriformes
Order:	Crocodilia
Superfamily:	Alligatoroidea
Clade:	Globidonta
Clade:	†Orientalosuchina Massonne et al., 2019
Genera
†Dongnanosuchus †Eoalligator †Eurycephalosuchus †Jiangxisuchus? †Krabisuchus †Orientalosuchus †Protoalligator

Orientalosuchina is an extinct clade of alligatoroid crocodylians from Southeast and East Asia that lived between Maastrichtian and Eocene.

The clade was named as the result of a 2019 study by Massonne et al. that included several extinct alligatoroid taxa from Asia and found that they were all closely related and together formed a monophyletic clade as basal members of Alligatoroidea, as shown in the cladogram below:^[1] They defined this clade as "the most inclusive clade containing Orientalosuchus naduongensis, Krabisuchus siamogallicus, Eoalligator chunyii, Jiangxisuchus nankangensis and Protoalligator huiningensis, but not Brachychampsa montana, Stangerochampsa mccabei, Leidyosuchus canadensis, Diplocynodon darwini, Bottosaurus harlani, or any species of recent Crocodylia".

Alligatoroidea	Diplocynodontinae† Globidonta Leidyosuchus† Deinosuchus† Navajosuchus† Ceratosuchus† Stangerochampsa† Brachychampsa sealeyi† Brachychampsa montana† Orientalosuchina† Eoalligator† Jiangxisuchus† Protoalligator† Orientalosuchus† Krabisuchus† Alligatoridae Alligatorinae Caimaninae

Some studies have disputed this placement of Jiangxisuchus within Orientalosuchina as an alligatoroid, instead recovering Jiangxisuchus as a basal member of Crocodyloidea.^[2][3]

References

1. Tobias Massonne; Davit Vasilyan; Márton Rabi; Madelaine Böhme (2019). "A new alligatoroid from the Eocene of Vietnam highlights an extinct Asian clade independent from extant Alligator sinensis". PeerJ. 7: e7562. doi:10.7717/peerj.7562. PMC 6839522. PMID 31720094.
2. Li, C.; Wu, X. C.; Rufolo, S. J. (2019). "A new crocodyloid (Eusuchia: Crocodylia) from the upper cretaceous of China". Cretaceous Research. 94: 25–39. doi:10.1016/j.cretres.2018.09.015. S2CID 133661294.
3. Rio, Jonathan P.; Mannion, Philip D. (6 September 2021). "Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem". PeerJ. 9: e12094. doi:10.7717/peerj.12094. PMC 8428266. PMID 34567843.