In a message dated 95-08-30 19:10:50 EDT, Thomas_R_HOLTZ@umail.umd.edu (th81) writes: >Yes, herrerasaurs have a tetradactyl foot. So do basal ornithischians, >prosauropods, most basal dinosauromorphs, and pterosaurs. The tetradactyl >pes is primitive for Ornithodira (at least). Basal pterosaurs and sauropods had pentadactyl pedes. G.O.