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307 results for “Ornithischia”
Figure 5 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 5. Frill elements of CMN 8882 (Arrhinoceratops brachyops). Parietal and squamosal in lateral (A) and medial (B) views. C, associated epi-ossifications of unknown orientation. Abbreviations: fp, facet for parietal; itf, infratemporal fenestra; itp, infratemporal process of squamosal; on, otic notch; p, parietal; pr, prominence; sq, squamosal; S1–9, loci for episquamosals 1–9.
Figure 2 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 2. Right maxilla of CMN 8882 (Arrhinoceratops brachyops) in lateral (A) and medial (B) views. Abbreviations: af, antorbital fenestra; fpmx, facet for premaxilla; mxc, maxillary cavity; t, tooth; tr, tooth row.
Figure 7 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 7. Right pterygoid of CMN 8882 (Arrhinoceratops brachyops) in medial view. Abbreviations: ec, 'eustachian canal'; fp, facet for palatine; pf, pterygoid flange.
Figure 9 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 9. Ceratohyal of CMN 8882 (Arrhinoceratops brachyops) in lateral or medial view (precise orientation indeterminate).
Figure 1 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 1. Skull reconstruction of CMN 8882 (Arrhinoceratops brachyops) in left lateral view. Missing portions are reconstructed with dashed lines.
Figure 6 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 6. Articulated maxilla and ectopterygoid of ROM 702 in lateral (A) and medial (B) views. Jugal of ROM 702 in lateral (C) and medial (D) views. See text for list of anatomical abbreviations. Scale bar: 5 cm.
Figure 17 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 17. Holotype skull of Hypacrosaurus stebingeri, MOR 549, in lateral view. See text for list of anatomical abbreviations. Scale bar: 10 cm.
Figure 9 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 9. Incomplete squamosal of Hypacrosaurus altispinus (AMNH 5248) in caudal (A), lateral (B), and medial (C) views. See text for list of anatomical abbreviations. Scale bar: 3 cm.
Figure 12 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 12. Left dentary of Hypacrosaurus altispinus, ROM 702, in medial view (A); detailed view of dentary teeth from inset (B). Scale bars: 5 cm in (A); 1 cm in (B).
Figure 7 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 7. Cranial bones of Hypacrosaurus altispinus. A, incomplete jugal of CMN 8674 in lateral view. B and C, incomplete quadratojugal of ROM 702 in lateral and medial views. D, vomer of CMN 2246 in?labial view. Scale bars: 2 cm.
Figure 8 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 8. Incomplete pterygoid of Hypacrosaurus altispinus (ROM 702), in lateral (A), medial (B), and caudal (C) views. Scale bar: 5 cm.
Figure 14 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 14. Bivariate plots of cranial growth exclusive of the cranial crest in lambeosaurine hadrosaurids. Blue (dotted) lines represent regression for Corythsaurus, red (solid) lines represent regression for Hypacrosaurus, and green (dashed) lines represent regression for Lambeosaurus. The log of skull length is the standard variable (x) in all comparisons. •, Corythosaurus casuarius; O, Corythosaurus intermedius morph; ¥, Hypacrosaurus altispinus; +, Hypacrosaurus stebingeri,
Figure 16 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 16. Results of phylogenetic analyses conducted in this study using a modified version of the data matrix presented in Evans & Reisz (2007). Top: strict consensus of three most parsimonious trees (MPTs) recovered from the phylogenetic analysis of Lambeosaurinae. The data resulted in three MPTs of 112 steps, each with a consistency index of 0.9, a rescaled consistency index of 0.83, and a retention index of 0.92. See Evans & Reisz (2007) for a character list. Bottom: majority rule consensus tree resulting from Bayesian analysis (Mk+gamma model) of the same data matrix. Abbreviations: bd, bremer decay value; bs, bootstrap value; us, unambiguous synamorphies; prob, posterior probability values.
Figure 15 in Cranial anatomy and systematics of Hypacrosaurus altispinus, and a comparative analysis of skull growth in lambeosaurine hadrosaurids (Dinosauria: Ornithischia)
Figure 15. Bivariate plots of cranial crest variables in lambeosaurine hadrosaurids. The log of skull length is the standard variable (x) in all comparisons. Blue (dotted) lines represent regression for Corythsaurus, red (solid) lines represent regression for Hypacrosaurus, and green (dashed) lines represent regression for Lambeosaurus. •, Corythosaurus casuarius; O, Corythosaurus intermedius morph; ¥, Hypacrosaurus altispinus; +, Hypacrosaurus stebingeri,, Lambeosaurus lambei, Z, Lambeosaurus clavinitialis morph; °, Lambeosaurus magnicristatus; z, Parasaurolophus walkeri.
Figure 26. Sauropodomorph skeletal forms. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 26. Sauropodomorph skeletal forms. A, Plateosaurus (a prosauropod). B, Nigersaurus (a sauropod). Gastralia are present in the prosauropod, but no sauropods possess gastralia. Images kindly provided by Scott Hartman who retains the copyright of each. Scale bar in centimetres.
Figure 25. Ornithischian skeletal forms. A, Eocursor. B, Edmontonia. C in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 25. Ornithischian skeletal forms. A, Eocursor. B, Edmontonia. C, Stegosaurus. No gastralia are present in these or any other known ornithischians. Images kindly provided by Scott Hartman who retains the copyright of each. Scale bars in centimetres.
Figure 42 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 42. Taxon deletion tree. Kunbarrasaurus and Jinyunpelta have been deleted. Tree length (of the 6 MPTs) is 212 steps, 14 steps fewer than found in the MPTs of the original dataset (Fig. 39). The principal clades: THYREOPHORA, STEGOSAURIA, ANKYLOSAURIA, Nodosauridae and Ankylosauridae conform topographically with those established by previous analyses. However, the ankylosauromorph branch and its composition, if confirmed in subsequent analyses, implies that the way Sereno (1986, et seq.) envisioned Eurypoda and Thyreophoroidea are meaningless.
Figure 22 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 22. Cartoons approximating pelvic region crosssectional body profiles of (A) an ankylosaur and (B) a stegosaur.
Figure 23. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 23. A theoretical model of pelvic aspiration in ornithopod ornithischians (based on a hadrosaur pelvis). A, B, dorsal views of the pelvic region showing the transverse motion suggested for the pubes that serially compressed and decompressed the abdominal cavity. Note: the ischia should meet distally on the midline, rather than remaining separate as shown here. C, lateral view of the pelvis showing a reconstruction of a hypothetical pubic abductor muscle. After Carrier & Farmer (2000a: fig. 10B). Abbreviations: Exp, expiration (pubes adducted); Insp, inspiration (pubes abducted); il, ilium; ipm, (hypothetical) iliopubic muscle; is, ischium; pu, pubis.
Figure 18. Scelidosaurus. Skull diagrammatics. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships
Figure 18. Scelidosaurus. Skull diagrammatics. A, pivot point between the squamosal and quadrate head viewed laterally, joint (q-sq.j) highlighted in black. B, posterior
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Allen Brain Atlas
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