Caryonosuchus is an extinct genus of sphagesaurid notosuchian known from the Late Cretaceous of São Paulo State, southeastern Brazil.

[1] Caryonosuchus is known only from the holotype specimen DGM 1411-R, a nearly complete anterior portion of the skull and lower jaw which housed at the Earth Science Museum of the Departamento Nacional da Produção Mineral.

It was found near Presidente Prudente City of southwest São Paulo State.

It was collected from the Adamantina Formation of the Bauru Basin, which dates to the Campanian and Maastrichtian stages of the Late Cretaceous.

[1] DGM 1411-R was found to be an advanced sphagesaurid in a phylogenetic analysis published by de Andrade et al. (2011).