Almadasuchus

Almadasuchus is an extinct genus of crocodylomorph known from the early Late Jurassic (early Oxfordian stage) Puesto Almada Member of the Cañadón Asfalto Formation of Patagonia, Argentina. It contains a single species, Almadasuchus figarii. It is known from the holotype MPEF-PV 3838, a well-preserved posterior region of the skull as well as other skull and postcranial remains.

According to a phylogenetic analysis that accompanied the first description of the species, A. figarii is the sister taxon or closest relative of the clade Crocodyliformes, a large group that originated in the Late Triassic and includes modern crocodilians. It is also a close relative of "sphenosuchians", a paraphyletic group of more basal non-crocodyliform crocodylomorphs. Almadasuchus is most closely related to the "sphenosuchian" Junggarsuchus from the Middle Jurassic of China. Almadasuchus is one of only four non-crocodyliform crocodylomorphs known from after the Early Jurassic, the others being Junggarsuchus and two "sphenosuchians" from the Late Jurassic Morrison Formation in the western United States, Hallopus and Macelognathus. Crocodyliforms appeared in the Late Triassic and began a major evolutionary radiation in the Jurassic, making Almadasuchus one of the last non-crocodyliform crocodylomorphs.