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323 results for “Paleontology”
Figure 23 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 23 Primary sedimentary structures in the Gara Sbaa Formation. A Linear cross-bedding at Gara Sbaa B Trough cross-bedding at Aferdou N'Chaft C Shallow channel cross-bedding (arrow) at Gara Sbaa D Tabular cross-bedding from unidirectional flow at Gara Sbaa E Large-scale cross-bedding at Gara Sbaa F Trough cross-bedding at Aferdou N'Chaft.
Figure 17 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 17 Southern lithostratigraphic sections of the Kem Kem Group. Vertical scale bar equals 100 m. Abbreviations: c clay p pebble sd sand st silt.
Figure 20 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 20 The Kem Kem Group at Iferda Timenkherin. A Overview B Close-up view of the boundary between members at Gara Sbaa: 1 Quaternary aeolian sand 2 Lower member 3 Boundary between the upper and lower members. Abbreviations: DF Douira Formation GSF Gara Sbaa Formation.
Figure 139 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 139 Preliminary skeletal silhouette reconstruction of Carcharodontosaurus saharicus with preserved bones (including tentative referrals) shown in gray (after Ibrahim et al. 2017). Scale bar equals 1 m.
Figure 2 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 2 Geographical setting of the Kem Kem region. Cenomanian (~94 Mya) paleogeographic world map showing key localities (map after Scotese 2002, da Silva and Gallo 2007). Abbreviations: 1 Kem Kem region in Africa 2 Tethys Ocean 3 opening Atlantic Ocean 4 South America.
Figure 135 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 135 Jugal of Carcharodontosaurus saharicus (UCRC PV12). Left jugal in (A) lateral and (B) medial view. Right jugal in (C) lateral and (D) medial view. Scale bar equals 20 cm.
Figure 136 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 136 Postorbital of Carcharodontosaurus saharicus (UCRC PV12). Left postorbital in (A) lateral and (B) medial view. Right postorbital in (C) lateral and (D) medial view. Scale bar equals 20 cm. Abbreviations: aj articular surface for the jugal al articular surface for the lacrimal als articular surface for the lateralsphenoid asq articular surface for the squamosal ipr intraorbital process ob orbital brow vg vascular groove.
Figure 13 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 13 Tectonic setting of the Kem Kem region. A Major tectonic complexes in southeastern Morocco (modified from Baidder 2007) B Kem Kem Hamada fault lines (top unnamed, bottom Omjrane-Taouz fault, Google Imagerie 2010 Digital Globe). Abbreviations: AAMF Anti Atlas Major Fault EF Erfoud Fault F fault line TF Taouz Fault.
Figure 133 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 133 Right maxilla of Carcharodontosaurus saharicus. UCRC PV12 in (A) lateral and (B) medial view. (See also Brusatte and Sereno 2007). Scale bar equals 20 cm. Abbreviations: amp anteromedial process antfor antorbital fossa ridge gdl groove for dental lamina iad interalveolar depression ip interdental plate m maxilla m3, 6 maxillary teeth 3, 6 mf maxillary fenestra.
Figure 130 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 130 Spinosaurid cervicodorsal vertebrae. A Partial mid cervical of Spinosaurus aegyptiacus (FSAC-KK 11888, cast) lacking the anterior end of the centrum, upper portion of the neural spine and postzygapophyses, B Articulated cervicodorsal series C2-D4) of Suchomimus tenerensis (MNBH GAD70) in left lateral view with most of the cervical ribs removed. Scale bar equals 5 cm in A (bottom), 10 cm in A (top) and B. Abbreviations: ns neural spine pl pleurocoel plf platform prz prezygapophysis tp transverse process.
Figure 128 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 128 Problematic cervical vertebrae from Niger and Morocco referable to Spinosaurus. NMC 41629 in (A) right lateral, (B) ventral, (C) anterior and (D) posterior view. NMC 41774 in (E) anterior and (F) posterior view. MNN IGU 11 in (G) right lateral, (H) ventral and (I) posterior view. UCRC PV13 in (J) anterior and (K) posterior view. NMC 41857 in (L) dorsal, (M) anterior and (N) posterior view. Scale bar equals 10 cm. Abbreviations: di diapophysis k keel pa parapophysis prz prezygapophysis.
Figure 22 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 22 Large-scale primary sedimentary structures. Large sedimentary structures occur occasionally in the upper parts of the Gara Sbaa Formation and the lower parts of the Douira Formation. In contrast to the primarily sandstone unit in (A), the lithology of (B) consists of inter-bedded sandstone and finer-grained beds. Human for scale in each equals 185 cm. The large-scale cross-bedding with good bottomsets and relatively low angle foresets is consistent with small Gilbert-type delta fronts. Alternatively, they could represent large point bar deposition with the differing lithologies of B as inclined heterolithic stratification.
Figure 127 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 127 Dorsal vertebrae of Spinosaurus aegyptiacus. Anterior dorsal neural arch with partial spine (FSAC-KK 04) from the Kem Kem Group in (A) left lateral, (B) right lateral, (C) anterior and (D) posterior view. Ventral portion of a mid dorsal vertebra (Stromer 1915) from the Bahariya Formation in Egypt in (E) right lateral view. Scale bar equals 10 cm in A-D. Abbreviations: c centrum id fos infradiapophysial fossa ipoz fos infrapostzygapophysial fossa iprz fos infraprezygapophysial fossa ns neural spine.
Figure 24 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 24 Tabular cross-bedding in the Gara Sbaa Formation. A Weathering of common tabular cross-beds B Close-up view of tabular cross-beds.
Figure 25 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 25 Sediment deformation and surface structures in the Gara Sbaa Formation at Gara Sbaa. A Large-scale overturned cross-bedding B Cross-section of overturned cross-bedding. C Surface view of overturned cross-bedding D Ripple marks E Desiccation cracks.
Figure 126 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 126 Cervical vertebrae of Spinosaurus cf. aegyptiacus from the Kem Kem Group. Mid cervical vertebra (NMC 50791) in (A) right lateral, (B) anterior, (C) posterior, (D) dorsal and (E) ventral view. Posterior cervical vertebra (NMC 50790) in (F) right lateral, (G) anterior and (H) ventral view. Mid cervical vertebra (NMC 41768) in (I) left lateral view. Posterior cervical vertebra (MPDM 33) in (J) left lateral and (K) dorsal view. Scale bar equals 20 cm. Abbreviations: di diapophysis epi epipophysis ila interspinous ligament attachment ns neural spine pa parapophysis pc pleurocoel prz prezygapophysis.
Figure 124 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 124 Rostral portions of Spinosaurus from Morocco and Algeria. Rostrum (MSNM V4047) in (A) left lateral view with enlarged sections. Rostrum (MNHN SAM 124) from Algeria in (B) ventral view with enlarged sections. Scale bar equals 20 cm for full lateral and ventral view. Abbreviations: antfe antorbital fenestra bfr bone fractures en external naris f foramen m2, 4 maxillary tooth 2, 4 m maxilla n nasal pm premaxilla rpm rostro-medial process of maxillae sf subnarial foramen.
Figure 138 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 138 Dentary fragments likely referable to Carcharodontosaurus saharicus. NMC 41859 in (A) right lateral, (B) medial and (C) dorsal (occlusal) view. FSAC-KK 02 in (D) dorsal (occlusal) and (E) medial view. NMC 41859 matched with the dentary of Giganotosaurus carolinii (MUCPv-95, redrawn and reversed from Calvo and Coria 1998) in (F) right lateral, (G) medial and (H) dorsal (occlusal) view. Scale bars equal 10 cm in A-E and 10 cm in F-H. F-G adjusted to same size (MUCPv-95 is 610 mm long, Calvo and Coria 1998).
Figure 122 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 122 Dentary fragments of Spinosaurus aegyptiacus from the Kem Kem Group. Anterior section of the left dentary (IMPG 969-1) in (A) lateral and (B) dorsal view. Posterior section of the left dentary (IMPG 969-2) in (C) lateral and (D) medial view. Part and counterpart aligned in (E) lateral and (F) dorsal view. The two specimens clearly belong to the same jaw section and individual (contraBuffetaut 1989, 1992). Scale bar equals 10 cm in A-D. Abbreviations: ad alveolus in the dentary t tooth.
Figure 15 from: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517
Figure 15 Generalized lithostratigraphic sections of the Kem Kem Group from Douira in the north to Hassi Zguilma in the south. Vertical scale bar equals 100 m.
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OpenNeuro
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