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41 results for “Tribodus”
Fig. 40 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 40. Basicranial circulation in other elasmobranchs. A, Egertonodus (Hybodus) basanus, after Maisey, 1983; B, extant Heterodontus, after Maisey, 1983; C, extant Chlamydoselachus, after Allis, 1923 (reproduction from Maisey, 1983: fig. 25; positions of ''ora'' and ''opha'' changed from original figure to reflect their correct positions); D, Cladodoides, after Maisey, 2005; E, Tamiobatis, after Maisey, 2005 (left side: interpretation of Williams, 1998; right side: interpretation of Maisey, 2005); F, Orthacanthus, after Schaeffer, 1981. No scale.
Fig. 39 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 39. Oblique medial view of the Tribodus braincase showing the foramina for the efferent pseudobranchial and ophthalmic arteries. The internal carotid arteries emerge on the internal floor of the braincase after tunneling through the basicranial cartilage, and diverge to form a posterolaterally curving branch, which further diverges into the efferent pseudobranchial and ophthalmic arteries external to the cartilage, and an anterolaterally curving branch, the optic artery, which exits through the optic foramen. Compare with figure 38. No scale.
Fig. 33 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 33. Lateral view of the Egertonodus braincase (NHM P60110), anterior to the left (surface rendering). No scale.
Fig. 32 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 32. Transverse CT scan slices of the Egertonodus braincase, BM(NH) P60110. Otic and occipital regions. No scale.
Fig. 34 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 34. Medial view of the Egertonodus braincase (NHM P60110), sliced through the sagittal plane, anterior to the left (surface rendering). No scale.
Fig. 28. Tribodus limae cephalic spines. A–C, AMNH 13957, left cephalic spine. A in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 28. Tribodus limae cephalic spines. A–C, AMNH 13957, left cephalic spine. A, lateral; B, dorsal; C, mesial views. D–E, AMNH 13959, right cephalic spine. D, mesial; E, lateral views. Scale bar is 1 cm.
Fig. 29 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 29. Braincase of Egertonodus basanus BM(NH) P60110, which was CT scanned for the present study. A, dorsal; B, ventral, and C, left lateral views. After Maisey, 1983. Features labeled according to Maisey's (1983) original description; an alternative interpretation is presented in figs. 29–33 and in the text of the present paper. Scale bar is 2 cm.
Fig. 30 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 30. Transverse CT scan slices of the Egertonodus braincase, BM(NH) P60110. Ethmoidal and orbital regions. No scale.
Fig. 26 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 26. (A) top, (B) bottom, and (C) lateral views of left cephalic spine of Tribodus limae (UERJ-PMB-
Fig. 36. A–C in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 36. A–C, Skeletal labyrinth of Egertonodus basanus (surface renderings), A, lateral; B, dorsal; C, medial views. D–F, Skeletal labyrinth of Tribodus limae, reconstructed by Maisey (2005), D, lateral; E, dorsal; F, medial views. No scale.
Fig. 23 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 23. Close-up of posterior basicranial foramina in Tribodus limae (UERJ-PMB-40). Scale bar is 1 cm.
Fig. 22 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 22. Lateral view of the Tribodus endocast and skeletal labyrinth, anterior to the right (surface rendering). No scale.
Fig. 31 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 31. Transverse CT scan slices of the Egertonodus braincase, BM(NH) P60110. Orbital and otic regions. No scale.
Fig. 35. A in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 35. A, dorsal; B, ventral; and C, lateral views of the Egertonodus endocast (surface renderings). No scale.
Fig. 21 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 21. Anterior (A) and posterior (B) views of the Tribodus endocast and skeletal labyrinth (surface renderings). No scale.
Fig. 20 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 20. Ventral view of the Tribodus endocast and skeletal labyrinth, anterior at top (surface rendering). No scale.
Fig. 19 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 19. Dorsal view of the Tribodus endocast and skeletal labyrinth, anterior at top (surface rendering). No scale.
Fig. 25 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 25. Close-up of the head region of Tribodus limae (AMNH 13959) showing right cephalic spine in situ, after acid preparation. Anterior to the left. Scale bar is 1.5 cm.
Fig. 18 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 18. Lateral view of the Tribodus limae endocast with otic labyrinth removed, anterior to the right
Fig. 15 in Morphology of the Braincase in the Cretaceous Hybodont Shark Tribodus limae (Chondrichthyes: Elasmobranchii), Based on CT Scanning
Fig. 15. Dorsal view of the Tribodus limae endocast with otic labyrinth removed, anterior at top (surface rendering). No scale.
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