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8 results for “Ptychoceratodus”
Fig. 7 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 7. Map of sedimentation environments in north-western Europe and south-eastern Greenland in Norian with marked occurrences of Ptychoceratodus rectangulus. Based on McKie and Williams (2009) and Ziegler (1998).
Fig. 8 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 8. Skull roof of dipnoan Ptychoceratodus rectangulus. A. Hypothetical fish silhouette with marked position of the skull roof. B. Skull roof reconstruction, originally preserved structures on the left side. Based on: SMNS 19707, KNK 4158, 4159, 4162, 4165. Arrows indicate sutures for corresponding bones.
Fig. 6 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 6. Dental plates and jaw bones of dipnoan Ptychoceratodus rectangulus (Linck, 1936) from the Carlsberg Fjord Beds, Fleming Fjord Formation (Upper Triassic), Macknight Bjerg, East Greenland. A. KNK 4154, upper dental plate with pterygopalatine bone in occlusal view. B. KNK 4156, lower dental plate in occlusal (B1, B2) and ventral (B3, B4) views. C. KNK 4157, lower dental plate with fragmentary prearticular bone in occlusal view. D. KNK 4164, incomplete dental plate in occlusal view.
Fig. 4 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 4. Skull roof bones of dipnoan Ptychoceratodus rectangulus (Linck, 1936) from the Carlsberg Fjord Beds, Fleming Fjord Formation (Upper Triassic), Macknight Bjerg, East Greenland. A. KNK 4158, KLMN+3 bone in dorsal (A1, A2) and ventral (A3, A4) views. B. KNK 4159, XYZ bone in lateral B1, B2) and medial (B3, B4) views. Arrows indicate sutures for corresponding bones.
Fig. 3 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 3. Principal Component Analysis of species of Ptychoceratodus dental plates. A. Lower dental plates. B. Upper tooth plates. In the analysis we used α, δ1, δ2, δ3, BCp, C1C2, and C1Cp measurements sensu Vorobyeva and Minikh (1968). White rectangles mean specimens from Macknight Bjerg locality (East Greenland) described herein.
Fig. 2 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 2. Scheme of the measured dimensions of dental plates of Triassic dipnoans. Abbreviations: B, mediolingual junction; C1, C2, C3, C4, ends of corresponding ridges; Cp, end of the last ridge; α, angle between medial and lingual margin; ð1, ð2, ð3, angles between last ridge and corresponding ridges; BCp, BC1, BC2, C1C2, C2C3, C1Cp, C2Cp, distances between corresponding points. Based on Frederickson and Cifelli (2017).
Fig. 1 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 1. Study area map (A) and stratigraphic column (B) with marked outcrops and age of the stratigraphic position of examined material. Based on Bengaard and Henriksen (1984) and Clemmensen et al. (1998).
Fig. 5 in Dipnoan from the Upper Triassic of East Greenland and remarks about palaeobiogeography of Ptychoceratodus
Fig. 5. Skull roof bones and opercle of dipnoan Ptychoceratodus rectangulus (Linck, 1936) from the Carlsberg Fjord Beds, Fleming Fjord Formation (Upper Triassic), Macknight Bjerg, East Greenland. A. KNK 4165, KLMN+3 bone imprint, in dorsal view. B. KNK 4160, opercle in lateral (B1) and medial (B2) views. C. KNK 4162, E bone in dorsal view. Arrows indicate sutures for corresponding bones.
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