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32 results for “Plesiosauria”
FIGURE 3 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 3. Interpretation of the holotype skull of Callawayasaurus colombiensis, UCMP 38349, in dorsal view. See Appendix 1 for anatomical abbreviations.
FIGURE 18 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 18. Single most parsimonious tree (tree length = 3895; CI = 0.652; RI = 0.519; RC = 0.554) of a branch and bound search conducted for 17 OTUs and 152 characters. Bootstrap values (based on 1000 replicates) for clades with greater than 50 percent support are given above the branches.
FIGURE 14 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 14. Strict consensus of three most parsimonious trees (tree length = 5802 steps; CI = 0.543; RI = 0.568; RC = 0.309) for 31 OTUs and 152 characters, indicating a hypothesis of relationships for Plesiosauria. Bootstrap values (based on 1000 replicates) for clades with greater than 50 percent support are given above the branches; Bremer support values greater than 10 are given below. The implementation of Thiele's (1993) method for quantitative characters results in tree lengths and Bremer support values that are approximately 10 fold greater than in an unweighted analysis. Node numbers are discussed in the text.
FIGURE 17 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 17. Results of analyses testing the influence of quantitative characters on the data set (matrix size = 31 OTUs; the OTU Callawayasaurus colombiensis represents the composite scoring). (A) Strict consensus of 20 most parsimonious trees (tree length = 540; CI = 0.550; RI = 0.577; RC = 0.317) for which all quantitative characters (1–4, 79, 85, 94, 95, 99, 130–132, 147, and 149) have been excluded from the data set (138 characters total). (B) Strict consensus of 32 most parsimonious trees (tree length = 746; CI = 0.594; RI = 0.542; RC = 0.322) of an analysis for which Thiele's (1993) gapweighting approach for quantitative characters is not implemented (all quantitative and qualitative characters have a weight = 1 and are unordered; 152 characters total).
FIGURE 12 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 12. Phylogenetic relationships and clade names of Triassic sauropterygians and Plesiosauria, as presented by Rieppel (2000). Taxa used as outgroups in this analysis are in bold print (Simosaurus, Cymatosaurus, and Augustasaurus).
FIGURE 2 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 2. Interpretation of the skull of BMNH 49202 in dorsal (A) and palatal (B) views. See Appendix 1 for anatomical abbreviations.
FIGURE 11 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 11. Interpretation of the holotype skull of Umoonasaurus demoscyllus, AM F99374, in dorsal view. See Appendix 1 for anatomical abbreviations.
FIGURE 21 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 21. Strict consensus of three trees (tree length = 480 steps; CI = 440; RI = 0.698; RC = 0.307) indicating an hypothesis of relationship among 36 OTUs and 170 characters based on a reanalysis of O'Keefe's (2004b) data matrix, with the inclusion of data for TMP 94.122.01. Bootstrap values (based on 1000 replicates) for clades with greater than 50 percent support are given above the branches for the clade Plesiosauroidea (sensu O'Keefe, 2001a) only.
FIGURE 6 in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 6. Interpretation of the holotype skull of Libonectes morgani, SMU 69120, in dorsal (A) and palatal (B) views. See Appendix 1 for anatomical abbreviations.
FIGURE 20. 50 percent majority rule tree showing a in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
FIGURE 20. 50 percent majority rule tree showing a hypothesis of relationship for Plesiosauria based on a Bayesian analysis of 31 OTUs and 152 characters. Branch support is indicated by posterior probabilities greater than or equal to 50.
Data from: A new Pliosaurus species (Sauropterygia, Plesiosauria) from the Upper Jurassic of Patagonia: new insights on the Tithonian morphological disparity of mandibular symphyseal morphology
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Data from: A new pliosaurid (Sauropterygia, Plesiosauria) from the Oxford Clay Formation (Middle Jurassic, Callovian) of England: evidence for a gracile, longirostrine grade of Early–Middle Jurassic pliosaurids
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