FIGURE A4 in Abelisauridae (Dinosauria: Theropoda) from the Late Jurassic of Portugal and dentition-based phylogeny as a contribution for the identification of isolated theropod teeth

FIGURE A4. States of crown structure-based characters. A. Isolated teeth of Baryonyx walkeri (A1, NHM R9951) and Suchomimus tenerensis (A2, MNN G48-9) in lateral view displaying less than ten flutes (char. 108:1) present on both labial and lingual side of the crown (char. 107:2) in those taxa. B. First and second left dentary teeth of Ceratosaurus nasicornis (formerly C. dentisulcatus; UMNH VP 5278 = UUVP 158) in lingual view showing the weak recurvature of these mesialmost crowns (char. 39:1), the untwisted mesial carina (char. 46:0) facing mesio-labially (char. 47:1) and terminating well-above the toothcervix (char. 50:0), and the fluted crown, only present on the lingual side of the tooth (char. 59:1). C. Isolated mesialmost tooth of Masiakasaurus knopfleri (FMNH PR 2696, small tooth) in mesio-lingual view displaying the twisted mesial carina (char. 46:1) extending to the tooth cervix (char. 50:1), as well as the flutes present only on the lingual side of the tooth (char. 59:1). D. First right premaxillary tooth of Proceratosaurus bradleyi (NHM R 4860) in labial view displaying the short longitudinal furrows/striations present at the base of the crown (char. 62:1) and the braided enamel surface texture of the crown (char. 117:1). E. Tenth left maxillary tooth of Herrerasaurus ischigualastensis (PVSJ 407) in lateral view showing the longitudinal furrows/striations present at the base of the crown (char. 62:1; also present on the mesialmost teeth of H. ischigualastensis = Ischisaurus cattoi, MACN 18.060), and the irregular/non-oriented enamel surface texture of the crown (char. 117:0). F. First right premaxillary tooth of Velociraptor mongoliensis (AMNH 6515) in labial view showing the flutes present on the labial side of the crows (char. 59:3). G. Fifth left maxillary tooth of Bambiraptor feinbergi (AMNH 30556) in labial view displaying the wide mesiodistally concave area on the basal part of the crown extending along two-thirds of the crown (char. 73:2) and giving the 8-shaped cross-section of the base crown (char. 72:3), and the two elongated, longitudinal and rounded ridges present on the lingual side of the crown as well (char. 116:2). H. Third right premaxillary tooth of Raptorex kriegsteini (LH PV18) in lingual view showing the two concave areas on the lingual side of the crown and adjacent to both carinae (char. 42:2) and the central and longitudinal ridge on the crown (char. 61:1). I. Sixth and eight left maxillary teeth of Allosaurus fragilis (UMNH VP 5393) in medial view displaying the deep and well delimited unerupted tooth fossa (char. 140:0) and the wide mesiodistally concave area on the basal part of the crown and present on the lingual side of the tooth, giving the bean-shape cross-section of the base crown (char. 72:2) in this specimen (photo courtesy shared by Stephen Brusatte). J. Enamel texture of the sixth right maxillary crown of Majungasaurus crenatissimus (FMNH PR 2278) in lateral view showing the irregular non-oriented enamel surface texture (char. 117:0). K. Enamel texture of the second right maxillary tooth of Acrocanthosaurus atokensis (NCSM 14345) in lateral view showing the regular, oriented braided enamel surface texture of the crown (char. 117:1). L. Enamel texture of an isolated tooth of Baryonyx walkeri (NHM R9951) in lateral view showing the deeply veined enamel surface texture of the crown (char. 117:2), strongly curved basally close to the carina (char. 118:1).