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103 results for “Mesoeucrocodylia”
Fig. 6 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 6. cf. Sokotosuchus. CNRST SUNY 279, partial skull roof and occiput in A, dorsal and B, occipital views. Scale bar equals 2 cm.
Fig. 5. Chenanisuchus lateroculi. CNRST SUNY 280 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 5. Chenanisuchus lateroculi. CNRST SUNY 280, partial skull roof and occiput in A, dorsal and B, occipital views. Scale bar equals 2 cm.
Fig. 2 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 2. Diagrammatic stratigraphic sections depicting correlations in age between strata at different Malian localities. Fossils described herein come from deposits in Mali-8 (Maastrichtian), Mali-18 (Paleocene), and Mali-20 (Eocene). Inset: map of eastern Mali showing relative locations of fossiliferous localities.
Fig. 1 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 1. Alternative hypotheses explaining the phylogenetic relationships of dyrosaurids. A, ''manual cladogram'', not based on a cladistic data matrix, hypothesized by Buffetaut (1978b). B, cladogram presented by Jouve (2005), based on cladistic analysis of 12 characters. C, cladogram presented by Jouve et al (2005b), based on cladistic analysis of 30 characters. Note basal position of Phosphatosaurus and highly nested position of Hyposaurus common to all hypotheses.
Fig. 7 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 7. Phylogenetic relationships and stratigraphic distribution of 10 dyrosaurid taxa and four outgroups, derived from ten equally most parsimonious trees. Tree length 5 66 steps; CI 5 0.6522; RI 5 0.7576; RCI 5 0.4941. Inset shows strict consensus of 10 most parsimonious trees; larger cladogram based on the single agreement subtree, which excluded Chenanisuchus, Congsaurus, and Elosuchus. Fine black lines depict the hypothesized phylogenetic relationships based on the current analysis. Bold black bars indicate the known stratigraphic ranges of taxa; solid gray bars represent inferred occurrences of taxa (i.e., ghost lineages). Alternative positions of Chenanisuchus (two alternatives) Congosaurus (four alternatives), and
Fig. 3 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 3. Rhabdognathus keiniensis. Partial skull roof and occiput of two individuals. CNRST SUNY 276 in A, dorsal and B, occipital views. CNRST SUNY 277 in C, dorsal and D, occipital views. Scale bars equal 2 cm.
Figure 5 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 5. Details of the cranium of Hamadasuchus rebouli (ROM 52620). A, right posterodorsolateral view into orbit showing prefrontal pillar. B, posteroventral view of occiput. Scale bar = 10 cm.
Figure 2 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 2. Cranium of Hamadasuchus rebouli (ROM 52620). A, right lateral and C, occipital view. B and D, outline drawings corresponding to each view. Scale bar = 10 cm. Anatomical abbreviations are defined in Appendix 1.
Figure 1 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 1. Cranium of Hamadasuchus rebouli (ROM 52620). A, dorsal and C, ventral view. B and D, outline drawings corresponding to each view. Scale bar = 10 cm. Anatomical abbreviations are defined in Appendix 1.
Figure 3 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 3. Details of the cranium of Hamadasuchus rebouli (ROM 52620). Upper details are to same scale; scale bar = 10 cm. Details of the dentition are to same scale; scale bar = 2 cm.
Figure 7 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 7. Partial juvenile crania of Hamadasuchus rebouli. A and C, dorsal and occipital views of ROM 52059. B and D, dorsal and occipital views of ROM 54511. E, partial cranium of Moroccan 'Libycosuchus' (modified from Buffetaut, 1976: fig. 3). Scale bar = 10 cm.
Figure 6 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 6. Partial left dentary of Hamadasuchus rebouli (ROM 49282) in A, lateral, B, medial, C, ventral, and D, dorsal views. Scale bar = 10 cm. Anatomical abbreviations are defined in Appendix 1.
The choanal anatomy of the Sebecus icaeorhinus Simpson, 1937 and the variation of the palatine shape in notosuchians (Crocodyliformes, Mesoeucrocodylia)
<p>Sebecidae is a clade of large carnivorous crocodyliforms that thrived in the Cenozoic and is the only lineage of the diverse and terrestrial group Notosuchia that survived the end-Cretaceous mass extinction event. <em>Sebecus</em> <em>icaeorhinus</em> is the best-known taxon from this clade, both in terms of its cranial and postcranial anatomy (known primarily from the holotype and the specimen MPEF-PV 1776 respectively). An additional material represented by a partial skull (MMP 235) is the only specimen that has preserved a complete choanal region. Here we describe new information from this specimen based on an X-ray computed tomography and identify through comparisons with other taxa a large degree of variability in the palatal anatomy within Sebecidae, in particular in the shape and extension of the palatine (the bone that defines the anterior position and shape of the secondary choana). We quantify here the variation in the shape of the palatine bone of sebecids through a 2D morphogeometric analysis within the context of notosuchian crocodyliforms. Although traditional accounts of palatal evolution in crocodyliforms linked variation of this structure to the adaptation to the aquatic environment, our analysis allows the recognition of eight palatine morphotypes among terrestrial crocodyliforms with very distinct paleoecological traits, including carnivorous, omnivorous, and possibly herbivorous taxa. Furthermore, we show that sebecids had a higher morphological disparity in the choanal region than other terrestrial groups of Notosuchia, underscoring the importance of this region for comparative, morphofunctional, and phylogenetic studies.</p>
Fig. 4. Phosphatosaurus gavialoides. CNRST SUNY 275 in Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) Fossils from the Upper Cretaceous and Paleogene of Mali: Implications for Phylogeny and Survivorship across the K/T Boundary
Fig. 4. Phosphatosaurus gavialoides. CNRST SUNY 275, partial lower jaw with one replacement
Figure 4 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 4. Details of the cranium of Hamadasuchus rebouli (ROM 52620). Scale bar = 10 cm.
Figure 9 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 9. Taxonomic arrangement of Mesosuchia based on Fig. 8C.
The choanal anatomy of the Sebecus icaeorhinus Simpson, 1937 and the variation of the palatine shape in notosuchians (Crocodyliformes, Mesoeucrocodylia)
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Figure 5 in New material of Pepesuchus (Crocodyliformes; Mesoeucrocodylia) from the Bauru Group: implications about its phylogeny and the age of the Adamantina Formation
Figure 5. Palatal surfaces of the maxillary from A, Pepesuchus deiseae (MCT 1788-R), with an anterior portion of the palatines showing a tipping point, compared with B, MCT 1723-R, with a broad and round anterior portion. Grey areas are associated sediments; hatched areas are broken parts. Scale bars represent 5 cm.
Figure 3. MCT 1723-R, rostrum. A, B, dorsal views. C, D in New material of Pepesuchus (Crocodyliformes; Mesoeucrocodylia) from the Bauru Group: implications about its phylogeny and the age of the Adamantina Formation
Figure 3. MCT 1723-R, rostrum. A, B, dorsal views. C, D, ventral views. Grey areas are associated sediments; hatched areas are broken parts. Scale bars represent 5 cm.
Figure 8 in New material of Pepesuchus (Crocodyliformes; Mesoeucrocodylia) from the Bauru Group: implications about its phylogeny and the age of the Adamantina Formation
Figure 8. Right maxillary tooth of MCT 1723-R, showing the false ziphodont condition. Grey areas are associated sediments; hatched areas are broken parts. Scale bar represents 5 cm.
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