Mystriosuchus planirostris measured about four metres long (13 ft), according to a complete skeleton which was found in 1995. The postcranial anatomy of the skeleton suggests that Mystriosuchus was more adapted to aquatic life than other known phytosaurs, while cranial morphology is suggestive of a primarily fish eating diet.
Mystriosuchus used to be placed in its own subfamily, Mystriosuchinae, however, recent research demonstratred that it belongs to the subfamily Pseudopalatinae, despite having several physical differences from most of the genera in this group. Originally considered to be a freshwater genus, a recent specimen from Northern Italy has shown that some Mystriosuchus specimens lived a completely marine life.
^ abcHungerbühler, A. 2002. The Late Triassic phylosaur Mystriosuchus westphali, with a revision of the genus. Palaeontology45(2): 377-418.
^ abcGozzi, E. & Renesto, S.A. 2003. Complete specimen of Mystriosuchus (Reptilia, Phytosauria) from the Norian (Late Triassic) of Lombardy (Northern Italy). Rivista Italiana Di Paleontologia e Stratigrafia109(3): 475-498.
^von Huene, F. 1915. On reptiles of the New Mexican Trias in the Cope Collection. Bulletin of the American Museum of Natural History34: 485-507.
^Long, R.A. & Murry, P.A. 1995. Late Triassic (Carnian and Norian) tetrapods from the southwestern United States. Bulletin of the New Mexico Museum of Natural History and Science4 254 pp.
^Stocker, M. R. (2012). "A new phytosaur (Archosauriformes, Phytosauria) from the Lot's Wife beds (Sonsela Member) within the Chinle Formation (Upper Triassic) of Petrified Forest National Park, Arizona". Journal of Vertebrate Paleontology32 (3): 573–586. doi:10.1080/02724634.2012.649815.edit