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43 results for “Ceratopsidae”
FIGURE 3 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 3. Nasals of NHMUK R4948, Chasmosaurus belli in A–B, right lateral, C–D, left lateral, and E–F, dorsal view. Abbreviations: nhc, nasal horn core; n-pm f, premaxillary facet on nasal; n-pm p, premaxillary process of nasal. Diagonal lines indicate broken bone. Scale bars equal to 20 cm.
FIGURE 11 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 11. Braincase of NHMUK R4948, Chasmosaurus belli in A, dorsal, B, ventral, C, right lateral, D, left lateral and E, posterior view. Scale bar equals 10 cm.
FIGURE 1 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 1. Rostral and premaxillae of NHMUK R4948, Chasmosaurus belli in A–B, right lateral, C–D, left lateral, and E–F, dorsal view. Abbreviations: pm dp, premaxillary dorsal process; pm f, premaxillary fenestra; pm fl, premaxillary flange extending into external naris; pm-m f, maxillary facet on premaxilla; pm-n f, nasal facet on premaxilla; pm sf, small foramen ventral to premaxillary fenestra on premaxilla; r, rostral; r dp, dorsal process of rostral; r pp, posterior process of rostral. Diagonal lines indicate broken bone. Scale bars equal to 20 cm.
FIGURE 25 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 25. Right femur of NHMUK R4948, Chasmosaurus belli, in A, anterior, B, posterior, C, lateral, D, medial, E, dorsal and F, ventral view. Abbreviations: 4t, fourth trochanter; at, anterior trochanter; gt, greater trochanter; hd, femoral head. Scale bar equals 20 cm for A–D, 15 cm for E–F.
FIGURE 2 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 2. Maxillae of NHMUK R4948, Chasmosaurus belli. A–D, right maxilla in A, C, lateral, and B, D, medial view; E– H, left maxilla in E, G, lateral, and F, H, medial view. Abbreviations: aof, antorbital fossa; m-ecpt f, ectopterygoid facet on maxilla; m-la-j f, lacrimal and jugal facets on maxilla; m mf, medial foramen on maxilla; m-n f, nasal facet on maxilla; m-pm f, premaxillary facet on maxilla; m-pt f, pterygoid facet on maxilla; m r, maxillary ridge. Diagonal lines indicate broken bone. Scale bars equal to 20 cm.
FIGURE 16 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 16. Syncervical of NHMUK R4948, Chasmosaurus belli in A, right lateral and B, left lateral view. Abbreviations: III, cervical three; III dia, diapophysis of cervical three; III ns, neural spine of cervical three; III para, parapophysis of cervical three; at, atlas; at rf, atlas rib facet; ax, axis; ax dia, diapophysis of axis; ax na, neural arch of axis; ax ns, neural spine of axis; ax para, parapophysis of axis. Scale bar equals 20 cm.
FIGURE 6 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 6. Quadratojugals of NHMUK R4948, Chasmosaurus belli. A–F, right quadratojugal in A, D, lateral, B, E, medial and C, F, posterior view. Abbreviations: ltf m, margin of the lateral temporal fenestra; qj-epj f, epijugal facet on quadratojugal; qj-j f, jugal facet on quadratojugal; qj-q f, quadrate facet on quadratojugal; qj r, ridge on quadratojugal; qj-sq f, squamosal facet on quadratojugal. Scale bar equal to 5 cm.
FIGURE 14 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 14. Preserved left lower jaw elements of NHMUK R4948, Chasmosaurus belli. A–J, posterior part of the left lower jaw in A–B, lateral, C–D, medial, E–F, posterior, G–H, dorsal and I–J, ventral view. K–L, left coronoid process in K, lateral and L, medial view. Abbreviations: add, adductor fossa; ar, articular; for, foramen; gle, glenoid fossa; par, prearticular; sa, surangular; sa-a f, facet for angular on surangular; sa-d f, facet for dentary on surangular. Hatching indicates broken bone. Scale bars equal to 5 cm.
FIGURE 18 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 18. Dorsal vertebrae one to four of NHMUK R4948, Chasmosaurus belli. A–C, dorsal one; D–F, dorsal two; G–I, dorsal three; J–L, and dorsal four; shown in A, D, G, J, anterior, B, E, H, K, posterior and C, F, I, L, right lateral view. Scale bar equals 5 cm.
FIGURE 19 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 19. Posterior dorsal vertebrae of NHMUK R4948, Chasmosaurus belli in A, D, G, anterior, B, E, H, posterior and C, F, I, right lateral view. These vertebrae are termed dorsals five to seven in the text, but their exact location in the dorsal vertebral column is unknown. Scale bar equals 5 cm.
FIGURE 24 in A new specimen of Chasmosaurus belli (Ornithischia: Ceratopsidae), a revision of the genus, and the utility of postcrania in the taxonomy and systematics of ceratopsid dinosaurs
FIGURE 24. Ulnae and radius of NHMUK R4948, Chasmosaurus belli. A–F, right ulna in A, anterior, B, posterior, C, lateral, D, medial, E, dorsal and F, ventral view. G–L, left ulna in G, anterior, H, posterior, I, lateral J, medial, K, dorsal and L, ventral view. M–P, right radius in M, anterior, N, posterior, O, dorsal and P, ventral view. The radius is preserved in three parts that have been approximately positioned relative to each other. Abbreviations: al p, anterolateral process; m p, medial process; o p, olecranon process; r f, radial facet; u f, ulnar facet. Scale bar equals 10 cm for A–D, G–J and M–N, and 5 cm for E–F, K–L and O–P.
Figure 6 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 6. Braincase elements of CMN 8882 (Arrhinoceratops brachyops). A, occiput in posterior view. Left laterosphenoid in external (B) and internal (C) views. Abbreviations: boc, basioccipital; bt, basal tuber of basioccipital; cf, cerebral fossa; cp, capitate process; ex, exoccipital; poc, paroccipital process; V, trigeminal foramen.
Figure 3 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 3. Left cheek elements of CMN 8882 (Arrhinoceratops brachyops) in anterior view. Abbreviations: con, quadrate condyle; ej, epijugal; ptp, pterygoid process; q, quadrate; qj, quadratojugal.
Figure 4 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 4. Right postorbital of CMN 8882 (Arrhinoceratops brachyops) in lateral (A), dorsal (B), and ventral (C) views. Abbreviations: cd, cornual diverticulum; ff, facet for frontal; o, orbit; pr, prominence; poh, postorbital horncore.
Figure 10 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 10. Evolutionary development in Ceratopsidae. A, comparative growth series for the ceratopsids Arrhinoceratops brachyops, Triceratops spp., Chasmosaurus belli and Centrosaurus apertus. The skulls are ordered from least (left) to most (right) mature. Reconstructed portions are indicated by dashed lines. Scale at bottom refers to % basal skull length of the largest individual known for the species (approximated by tooth row length in Arrhinoceratops). Note that maturity does not necessarily correspond to size. B, phylogeny of Ceratopsidae deduced from developmental event-pairs. Unambiguous apomorphic events are listed to the right of the branches and correspond to the numbers listed in Table 3; bootstrap/Bremer support values are listed to the left of the branches.
Figure 8 in Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs
Figure 8. Lower jaw elements of CMN 8882 (Arrhinoceratops brachyops). Predentary in right lateral (A) and anterior (B) views. Left lower jaw in lateral (C) and medial (D) views. Right lower jaw in lateral (E) and medial (F) views. Lower jaws in dorsal view (G). Note that some of the braincase elements are preserved in association with the right lower jaw (C, D). Abbreviations:?ar, possible articular; bc, braincase; corp, coronoid process; d, dentary; fpd, facet for predentary; fspl, facet for splenial; lf; lateral flange of dentary; tr, tooth row; sa, surangular; spl, splenial; ts, triturating surface.
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).
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