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307 results for “Ornithischia”
Figure 40. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 40. A bootstrap analysis (Heuristic) of the dataset using 10 000 replicates. Bootstrap support percentages are indicated on individual branches.
Figure 20. Scelidosaurus. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 20. Scelidosaurus. A reconstruction of the head-neck and shoulder girdle based on Norman (2020a, b). Highlighting the m. cucullaris (= m. sternocleidomastoideus) muscle that has been hypothesized to be associated with the presence of epistyloid bones. Abbreviations: Cor, coracoid; Sca, scapula.
Figure 39 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 39. Strict consensus tree based on the ten equally most parsimonious trees (MPTs) generated by the new analysis. The lack of resolution lies in the topographic ambiguity of Kunbarrasaurus, Jinyunpelta and that of the four nodosaurid taxa. Overall, the topology supports many aspects of previously published cladograms. However, and controversially, Scutellosaurus, Emausaurus and Scelidosaurus are positioned as successive outgroups on the branch leading to Ankylosauria. Convention places these taxa on the branch leading to Thyreophora. Kunbarrasaurus may well prove to be a stem ankylosaur once it has been fully described; furthermore, Jinyunpelta is positioned as a basal ankylosaurian. However, Zheng et al. (2018) propose that it is an ankylosaurine ankylosaur (despite the lack of resolution in their strict consensus tree) (see also Fig. 41). Numerical decay indices (Bremer support) for the individual clades are indicated in italics adjacent to the relevant branches.
Figure 35 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 35. Scelidosaurus. Femur and hindlimb motion examined. The principal lines of action of retractor muscles and their influence upon the femur and hindlimb poses have been reconstructed as a series of cartoons. A, dorsal view of the femur in 'neutral' pose with lines of action of main muscles: note in particular the lateral or medial attachment of these muscles on the femoral shaft. B, vertical pose of the femur with an indication of the posteromedial lines of action of the powerful limb retractors (cfb/l, m. caudifemoralis; add, m. adductor). C, cross-section through the femoral shaft at the level of the 4th trochanter showing the torsion inducing lines of action of the principal protractors (pifi, ist) and retractors (if, cfb, cfl). D, mechanical influence on hindlimb protraction resulting from the breadth of the gut. E, oblique-to-parasagittal hindlimb excursion during the protraction-retraction cycle.
Figure 43 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 43. Charmouth in the Sinemurian (c.193 Mya). A reconstruction of the environmental conditions (a river in spate) that might have led to the accumulation of a variety of carcasses of Scelidosaurus in nearby near-shore sediments. The skeletons were buried in coarser fluvial sediments that, over time, became diagenetically altered into a limestone bed within the cliff of Blue Lias exposed on Black Ven. Illustration by John Sibbick, who retains the copyright to this image.
Figure 31 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 31. Pelvic reconstructions in left lateral view. A, Scelidosaurus (after Norman, 2020b: fig. 77). B, Euoplocephalus (after Coombs, 1978a). C, Stegosaurus (after Gilmore, 1914).
Figure 1 in Taxonomic, palaeobiological and evolutionary implications of a phylogenetic hypothesis for Ornithischia (Archosauria: Dinosauria)
Figure 1. Hypotheses of the phylogenetic relationships of dinosaurs compared: A, the traditional ('Seeley') hypothesis (e.g. Nesbitt 2011; Langer et al., 2017) incorporating the clade Silesauridae. B, the 'Phytodinosauria' hypothesis (e.g. Paul 1984; Bakker, 1986). C, the 'Ornithoscelida' hypothesis (e.g. Baron et al., 2017a, 2017b; Cau, 2018). D, the 'Seeley' hypothesis with Silesauridae placed as the sister-taxon to traditional ornithischians (e.g. Langer & Ferigolo, 2013; Cabreira et al., 2016). E, paraphyletic silesaurs as stem-lineage ornithischians (Müller & Garcia, 2020a). Silhouettes are based on artwork by Márcio L. Castro.
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International Brain Laboratory public data
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OpenNeuro
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