Rhamphosuchus

Rhamphosuchus is a genus of extinct gavialoid crocodylians from the Indian subcontinent. Two species are currently recognized, the geologically older R. pachyrhynchus, represented by fossils recovered in Oligocene and Miocene deposits of Pakistan's Bugti and Laki Hills, and the younger R. crassidens, known from the Pliocene Siwalik Hills of Northern India. Additional remains are also known from the Pliocene of Nepal and a tentative third species was recovered in Pakistan. Both species are known for their great size, with rigorous estimates showing potential body lengths ranging from for R. crassidens to a 2025 estimate for R. pachyrhynchus around .

Both Rhamphosuchus species were historically considered part of the genus Gavialis, though detailed study revealed that their morphology differs significantly from that genus, which is represented by the extant gharial. Compared to the gharial, species of Rhamphosuchus are noticeably more robust, with snouts that gradually widen towards the back of the head, along with teeth that vary in size, are closely spaced, and form an "overbite" similar to that of modern alligators rather than the interlocking teeth of other gavialoids. Rhamphosuchus skulls bear prominent depressions around the bony naris that bears a close resemblance to the naris of male gharial skulls, which may indicate the presence of a knob-like soft tissue structure known as a ghara. The two named species are best differentiated by the shape of their snout tips, as that of R. crassidens is around the same height and width as the rest of the snout, while that of R. pachyrhynchus is prominently expanded both to the sides and upwards.