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.