Figure 1. Tatisaurus oehleri Simmons, 1965. Holotype, FMNH CUP 2088. A in Reconsidering the status and affinities of the ornithischian dinosaur Tatisaurus oehleri Simmons, 1965

Figure 1. Tatisaurus oehleri Simmons, 1965. Holotype, FMNH CUP 2088. A, Lower jaw in lateral view. All the tooth crowns are heavily eroded and the jaw itself is poorly preserved. B, FMNH CUP 2088. Lower jaw in medial view; fragments of postdentary bones and a?quadrate are firmly attached. Abbreviations: ar, articular/prearticular splint; cr, tip of crown of replacement tooth showing denticulate margin; d, dentary; e.cr, eroded crowns of functional teeth; M.gr, Meckel's groove; q, quadrate; sa, surangular; sym, dentary symphysis. The adherent bones are untextured, as is the matrix that surrounds the tooth roots and fills the alveoli.