Pehuenchesaurus was described in 2005 by Alan Turner and Jorge Calvo
based on MAU-PV-CRS-440, a nearly complete
dentary (the main tooth-bearing bone of the lower jaw). This animal had a narrow, tall lower jaw, and differed from all other sebecosuchians by lacking serrations on its teeth. The first and fourth teeth were the largest, and the first tooth pointed forward slightly. The preserved jaw bone is about long. Turner and Calvo found their new genus to be the
basalmost sebecosuchian. The
type species is
P. enderi, named for
Ender Wiggin, a character in
Orson Scott Card's works. == References ==