Orientalosuchus

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Orientalosuchus
Temporal range: Eocene
Orientalosuchus skulls coll - Massonne et al 2019.png
Different skulls of Orientalosuchus naduongensis in dorsal (upper line) and ventral (lower line) views
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Crocodilia
Superfamily: Alligatoroidea
Clade: Globidonta
Clade: Orientalosuchina
Genus: Orientalosuchus
Massonne et al., 2019
Type species
Orientalosuchus naduongensis
Massonne et al., 2019

Orientalosuchus is an extinct genus of alligatoroid crocodylian from the Late Eocene that was found in the in Vietnam.

The type species naduongensis was named after the location where it was found in Northeastern Vietnam, near the Chinese border. The Na Duong Formation is dated to the middle to late Eocene (late Bartonian to Priabonian), from 39 to 35 million years ago. Twenty-nine well preserved individual fossils were recovered in the area from 2009 to 2012.[1]

The new genus Orientalosuchus was named in a 2019 study by Massonne et al. that also included several other extinct alligatoroid taxa from Asia. Phylogenetic analysis found that they were all closely related and together formed a monophyletic clade (newly named Orientalosuchina) as basal members of Alligatoroidea, as shown in the cladogram below:[1]

Alligatoroidea

Diplocynodontinae Cartography of Europe.svg

Globidonta

Leidyosuchus Cartography of North America.svg

Deinosuchus Cartography of North America.svg

Navajosuchus Cartography of North America.svg

Ceratosuchus Cartography of North America.svg

Stangerochampsa Cartography of North America.svg

Brachychampsa sealeyi Cartography of North America.svg

Brachychampsa montana Cartography of North America.svg

Eoalligator Cartography of Asia.svg

Jiangxisuchus Cartography of Asia.svg

Protoalligator Cartography of Asia.svg

Orientalosuchus Cartography of Asia.svg

Krabisuchus Cartography of Asia.svg

Alligatoridae

Alligatorinae

Caimaninae

References[]

  1. ^ a b 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.


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