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Temporal range: Eocene
Scientific classification

  • T. hsiangiYoung, 1949 (type)

Tienosuchus is a dubious extinct monospecific genus of gavialoid crocodilian. It is known from a single tooth and some postcranial remains collected from Eocene deposits in Hunan, China. [1] It is closely related to the genus Thoracosaurus , and has traditionally been placed in the subfamily Thoracosaurinae. The subfamily is now considered to be a paraphyletic assemblage of basal gavialoids, and therefore not a true clade. [2] Because the fragmentary remains provide little diagnostic value, the genus is now considered a nomen dubium .

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Gryposuchinae is an extinct subfamily of gavialid crocodylians. Gryposuchines lived mainly in the Miocene of South America. However, "Ikanogavialis" papuensis may have survived more recently, into the Late Pleistocene/Holocene. Most were long-snouted coastal forms. The group was named in 2007 and includes genera such as Gryposuchus and Aktiogavialis, although a 2018 study indicates that the group might be paraphyletic and rather an evolutionary grade towards the gharial.


  1. Lucas, S.G. (2001). "Paleogene". Chinese Fossil Vertebrates . New York: Columbia University Press. pp.  229. ISBN   9780231084833.
  2. Brochu, C. A. (2004). "A new Late Cretaceous gavialoid crocodylian from Eastern North America and the phylogenetic relationships of Thoracosaurs" (PDF). Journal of Vertebrate Paleontology. 24 (3): 610–633. doi:10.1671/0272-4634(2004)024[0610:anlcgc]2.0.co;2. S2CID   131176447.