Named By: J. F. Bonaparte - 1969.
Classification: Chordata, Reptilia, Archosauria, Pseudosuchia, Ornithosuchidae.
Species: R. tenuisceps (type).
Size: Skull 25 centimetres long. Roughly estimated to be about 2 meters long.
Known locations: Argentina - Los Colorados Formation.
Time period: Norian of the Triassic.
Fossil representation: Based upon almost compete skull and partial post cranial skeletal remains. Fossil remains of at least four individuals are now known.
Riojasuchus is a genus of ornithosuchid pseudosuchian that lived during the late Triassic. At the time of writing the Ornithosuchidae is a small group of pseudosuchian archosaurs that aside from Riojasuchus, only contains Ornithosuchus and Venaticosuchus.
- Dos nuevas "faunas" de reptiles triasicos de Argentina [Two new reptilian "faunas" of the Argentine Triassic]. - Gondwana Stratigraphy (IUGS Symposium, Buenos Aires) 2:283-306. - J. F. Bonaparte - 1969.