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51 results for “theropod teeth”
FIGURE A6 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 A6. Strict consensus cladogram of 10 most parsimonious trees recovered from the analysis of a data matrix of dentition based characters. Initial analysis was a New Technology Search using TNT v.1.1 of a data matrix comprising 141 characters for one outgroup (Eoraptor) and 59 nonavian theropod taxa. Tree length = 681 steps; CI = 0.338; RI = 0.56. Bremer support values are in bold and bootstrap values are in italic.
FIGURE A3 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 A3. States of denticle-based characters. A. Mid-crown denticles on the distal carina of an isolated tooth of Carcharodontosaurus saharicus (UC unlabelled) in lateral view showing the asymmetrically convex (char. 88:1) and parabolic (char. 90:0) margin of subquadrangular (char. 92:0) and apically inclined (char. 96:1) denticles, as well as a narrow interdenticular space (char. 103:0). B. Mid-crown denticles on the distal carina of an isolated tooth of Afrovenator abakensis (UC unlabelled) in lateral view showing the symmetrically convex (char. 88:0) and semi-circular (char. 90:2) margin of horizontal subrectangular (char. 92:1) denticles, perpendicular to mesial margin (char. 96:0), as well as a narrow interdenticular space (char. 103:0). C. Distal denticles of the fourth left maxillary tooth of Eodromaeus murphi (PVSJ 561) in lateral view displaying the mid-crown denticles vertically subrectangular in shape (char. 92:2) and having a convex external margin (char. 90:0) on the distal carina. D. Third left maxillary tooth of Scipionyx samniticus in lateral view displaying an unserrated mesial carina (char. 76:1), mid-crown denticles vertically subrectangular in shape (char. 92:2) and having a flattened margin (char. 90:1) on the distal carina, and a serrated distal carina extending well-beneath the crown apex (char. 102:1). E. Mid-crown denticles on the distal carina of an isolated tooth belonging to an indeterminate abelisaurid (MUCPv 482) in lateral view showing apically hooked denticles (char. 88:2) with a parabolic margin (char. 90:0), subquadrangular in shape (char. 92:0) and apically inclined (char. 96:1) from the distal margin, as well as a narrow interdenticular space between the denticles (char. 103:0). F. Mid-crown denticles on the distal carina of the third right premaxillary tooth of Eoraptor lunensis (PVSJ 512) in lateral view showing the apically hooked denticles (char. 55:2). G. Basal and mid-crown denticles on the distal carina of an isolated tooth of Troodon formosus (DMNH 22837) in lateral view showing subquadrangular (char. 92:0), apically hooked and strongly variable in size (char. 88:2) denticles, apically inclined (char. 96:1) from the distal margin, as well as a broad interdenticular space (char. 103:1) between them. H. Apical denticles on the mesial carina of an isolated tooth of Acrocanthosaurus atokensis (SMU 74646) in lateral view showing the subquadrangular (char. 91:1) and apically inclined (char. 95:1) denticles with a flattened margin (char. 89:1). I. Apical denticles on the mesial carina of an isolated lateral crown belonging to Megalosaurus bucklandi (NHM R234, tooth in matrix) in lateral view showing the apically inclined (char. 95:1) and biconvex denticles (char. 94:1). J. Mid-crown denticles on the distal carina of the ninth right maxillary tooth of Allosaurus fragilis (AMNH 851) in lateral view showing the symmetrically convex (char. 88:0), horizontal subrectangular (char. 92:1) and apically inclined (char. 96:1) denticles, as well as the broad interdenticular space (char. 103:1). K. Mid-crown denticles on the distal carina of an isolated tooth of Suchomimus tenerensis (MNN G73-3) in lateral view showing the serrated carina (char. 78:0) with minute denticles (char. 86:0) of irregular size along the carina (char. 93:1) and a veined enamel texture (char. 117:2). L. Distal carina at mid-crown in an isolated tooth of Spinosaurus aegyptiacus (MSNM V6422) in laterodistal view showing an unserrated carina (char. 78:1) and a deeply veined enamel surface texture (char. 117:2) curving basally in the vicinity of the carina (char. 118:1). M. Distal carina at mid-crown of a maxillary tooth of Irritator challengeri (SMNS 58022) in lateral view showing an unserrated carina (char. 78:1) and the smooth enamel surface texture (char. 117:0).
FIGURE A5 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 A5. States of crown undulation-based characters and distribution of transversal and marginal undulations in nonavian Theropoda. A. Fifth? left maxillary tooth of Herrerasaurus ischigualastensis (formerly Sanjuansaurus gordilloi, PVSJ 605) in lateroventral view displaying the well-visible (char. 109:2) but few (char. 110:0) transversal undulations on the crown. B. Fifth or sixth left maxillary tooth of Ceratosaurus nasicornis (USNM 4735) in labial view displaying the well-visible (char. 109:2) but few (char. 110:0) transversal undulations on the crown. C. Second left maxillary tooth of Majungasaurus crenatissimus (FMNH PR 2278) in medioposterior view displaying the well-visible (char. 109:2) but few (char. 110:0) transversal undulations on the crown, as well as the subrectangular maxillary alveoli (char. 23:1). D. Isolated lateral tooth of Megalosaurus bucklandii (OUMNH J.29866) in lateral view displaying the well-visible (char. 109:2) and numerous and closely packed (char. 110:1) transversal undulations on the crown. E. Fifth and sixth right maxillary teeth of Acrocanthosaurus atokensis (NCSM 14345) in lateral view displaying the well-visible (char. 109:2) but few (char. 110:0) transversal undulations, that cannot be confused with the pronounced (char. 112:1) and mesiodistally elongated (char. 111:2) marginal undulations adjacent to the distal carina. F. Eighth left maxillary tooth of Dromaeosaurus albertensis (AMNH 5356) in medial view showing the well-visible (char. 109:2) but few (char. 110:0) transversal undulations on the crown. G. Isolated lateral tooth of Carcharodontosaurus saharicus (UC unnumbered) in laterodistal view showing the elongated (char. 111:2), pronounced (char. 112:1) and mesio-distally oriented (char. 114:0) marginal undulations adjacent to the distal carina. H. Mesial margin of a left maxillary tooth in labialo-mesial view (H1) and distal margin of a right maxillary tooth in labialo-distal view (H2) of Irritator challengeri (SMNS 58022) displaying the elongated (char. 111:2) and mesio-distally oriented (char. 114:0) marginal undulations adjacent to the mesial carina, and the diagonally oriented marginal undulations (char. 114:1), adjacent to the distal carina. I. Isolated lateral tooth of Megalosaurus bucklandi (OUMNH J.23014) in latero-distal view displaying the tenuous (char. 109:2) and few (char. 110:0) transversal undulations on the crown, as well as the short (char. 111:1) and diagonally oriented (char. 114:1) marginal undulations, adjacent to the distal carina only (char. 113:1). J. Isolated lateral tooth of Afrovenator abakensis (UC UBA1) in latero-mesial view displaying the short (char. 111:1) marginal undulations, adjacent to the mesial carina only (char. 113:0). K. Isolated lateral tooth of Neovenator salerii (MIWG 6348) in labial view displaying the concave surface adjacent to the distal carina (char. 71:1), the elongated (char. 111:2), mesio-distally oriented (char. 114:0) marginal undulations, adjacent to the distal carina only (char. 113:1). L. Fourth left maxillary tooth of Ceratosaurus nasicornis (USNM 4735) in mesial view showing the short (char. 111:1) marginal undulations adjacent to the mesial carina only (char. 113:0).
FIGURE 6 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 6. Plots of CHR versus DAVG of ML 962, ML 327, ML 966 and 21 theropod taxa comprising the data set. For reasons of clarity, only taxa with serration of less than 20 denticles were considered.
Data from: Learning to see the wood for the trees: machine learning, decision trees and the classification of isolated theropod teeth
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Data from: Abelisauridae (Dinosauria: Theropoda) from the Late Jurassic of Portugal and dentition-based phylogeny as a contribution for the identification of isolated theropod teeth
Open the record for dataset details and reuse information.
FIGURE A9b 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 A9b. (Continued)
FIGURE A1 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 A1. Cross-section outlines of the base crown at the cervix in nonavian theropods. A. subcircular; B. elliptical; C. subrectangular; D. oval; E. lanceolate; F. lenticular; G. eight-shaped; H. bean-shaped (reniform); I–J. U-shaped; K–L. Dshaped; M–N. 'Flying-saucer' shape; O. J-shaped.
FIGURE A8. A 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 A8. A. Strict consensus cladogram of nine most parsimonious trees recovered from the analysis of a supermatrix including a dentition-based datamatrix and six recent datasets based on whole theropod skeleton (i.e., Xu et al. 2009; Brusatte et al. 2010; Martinez et al. 2011; Senter 2011; Pol and Rauhut 2012; Carrano et al. 2012). Initial analysis was a New Technology Search using TNT v.1.1 of a supermatrix comprising 1972 characters for one outgroup (Eoraptor) and 59 nonavian theropod taxa. Tree length = 3583 steps; CI = 0.546; RI = 0.604. B. Strict consensus cladogram of four most parsimonious trees recovered from the analysis of a supermatrix after the deletion of the two wildcard taxa Erectopus and Piatnitzkysaurus. Tree length = 3529 steps; CI = 0.575; RI = 0.642.
FIGURE 5 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 5. Plots of CBR versus CHR of ML 962, ML 327, ML 966 and 23 theropod taxa comprising the data set. For reasons of clarity, only taxa with CBR of less than 1 were considered.
FIGURE A10 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 A10. Strict consensus cladogram of 96 most parsimonious trees recovered from the analysis of a supermatrix including a dentition-based datamatrix and six recent datasets based on whole theropod skeleton (i.e., Xu et al. 2009; Brusatte et al. 2010; Martinez et al. 2011; Senter 2011; Pol and Rauhut 2012; Carrano et al. 2012). Initial analysis was a New Technology Search using TNT v.1.1 of a supermatrix comprising 1972 characters for one outgroup (Eoraptor), 59 non-avian theropod taxa and ML 327, ML 966, ML 939 (coded as lateral teeth), and ML 962 (coded as a mesialmost tooth). Tree length = 3607 steps; CI = 0.529; RI = 0.58.
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