On the flipside, whereas most gryposuchines were restricted to a certain coastal region and time period, Gryposuchus enjoyed a continent wide distribution, spread from Andeo-Venezuelan drainage basin to Argentina from the Middle Miocene onwards. Most were long-snouted coastal forms. Fossil representation: Several fossils of teeth with jaw and skull fragments. The co-current aridification of the continental interior, and isolation of the peripheral wetland basins, also restricted the space and food resources of these large, food intensive specialist crocodilians, and has thus also been suggested as an essential factor in their extinction. The relationship of tomistomines in particular is unclear, as they have also been classified as crocodiles. Below is a cladogram from the 2007 analysis showing the phylogenetic relationships of gryposuchines among gavialoids: Hesperogavialis was excluded due to a lack of skull material, and Dadagavialis due to its 2018 discovery..
Four species belonging into the genus Gavialis may be included. Gryposuchus is an extinct genus of gavialoid crocodilian.It is the type genus of the subfamily Gryposuchinae. This was likely due to the continuing elevation of the northern sections of the Andes chain reshaping the future Amazonian drainage system, re-rerouting flow to the Venezuelan Caribbean to the much cooler Atlantic, and transforming the mega-wetlands into a fully developed riverine system. Gryposuchus pachakamue is a long-snouted gavialoid crocodylian diagnosed by the following unique combination of characters: ... highly diversified community dominated by small caimans with crushing dentitions reflecting a specialized malacophagous diet . The subfamily Gryposuchinae are the sole members of the superfamily Gavialoidea to occupy South America, the duration of which is entirely limited to the Miocene. Found in association with dugongs and sea turtles, "Ikanogavialis papuensis" was a marine animal like its ancestors, a 2-3 meter long coastal piscivore so far known only from Murua. Molnar, R. E. 1982. Gryposuchinae is an extinct subfamily of gavialid crocodylians. Moreover, warm equatorial currents run across the Atlantic from Africa to the Americas, assisting in travel. However, there may be evidence that Piscogavialis survived this mass extinction, persisting on the Pacific coast of Pliocene Peru for a few million more years. It was defined as a stem-based taxon including Gryposuchus jessei and all crocodilians more closely related to it than to Gavialis gangeticus (the gharial) or Tomistoma schlegelii (the False gharial).  Several other gavialid taxa also went extinct globally, suggesting a major global climate change event. Additionally, indeterminate finds of gavialoids (all in either coastal or marine sediments) are present in early Miocene Jimol Formation and for the early/middle Miocene Castilletes Formation in Colombia, and from the Oligo-Miocene boundary Pirabas Formation of coastal Brazil, Gryposuchus and Ikanogavialis persist into the Middle Miocene, with the freshwater-adapting Gryposuchus expanding throughout the Pebas mega-wetlands into inland Peru and Argentina.
 Furthermore, indeterminate gavialoid remains have recovered from the Oligo-Miocene boundary of coastal Brazil. Like other Pleistocene gharials, the species was presumably was hunted to extinction by humanity.. At this point, five of the seven genera are present in the Late Miocene, with four genera overlapping in the Urumaco Formation of Venezuela alone, a particular hotspot for crocodilian diversity in the Miocene. , Gryposuchinae was named in 2007 as a subfamily of closely related gavialid crocodilians. In younger beds at … One distinguishing feature of the group is the lack of a large exposure of the prootic bone around the trigeminal foramen, a hole in the side of the braincase wall. A longirostrine crocodilian from Murua (Woodlark), Solomon Sea.
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