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100 results for “Crocodylus”
Figure 12 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 12. 'Crocodylus' depressifrons Blainville, 1855, specimen IRSNB R253 from Orp-le-Grand. A, B, photograph and interpretative drawing of the lower jaw in dorsal view. See main text for abbreviations.
Figure 15 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 15. 'Crocodylus' depressifrons Blainville, 1855, specimen IRSNB R254 from Leval. A, skeleton in left lateral view; B, in dorsal view. This adult specimen was a medium sized crocodylian reaching at least a total length of about 3 m.
Figure 7 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 7. 'Crocodylus' depressifrons Blainville, 1855. A, left jugal in lateral view, specimen IRSNB R251 from Erquelinnes; B, right jugal in lateral view, specimen IRSNB R252 from Orp-le-Grand; left jugal in ventrolateral view, C, specimen IRSNB R254 from Leval. The arrows and the arched lines indicate the depressed and less ornamented area marked by a continuous ridge and located on the lateral surface of the jugal, at the base of the descending process that reaches the ectopterygoids.
Figure 10 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 10. 'Crocodylus' depressifrons Blainville, 1855, specimen IRSNB R253 from Orp-le-Grand. A, B, photograph and interpretative drawing of the anterior palatal region in ventral view. See main text for abbreviations.
Figure 9 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 9. 'Crocodylus' depressifrons Blainville, 1855, IRSNB R252 from Orp-le-Grand. Pterygoids in ventral view. The ellipses schematically indicate the marked concavities placed anteriorly to the choana. A small section of the choanal rim is preserved where indicated. See main text for abbreviations.
Figure 2 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 2. 'Crocodylus' depressifrons Blainville, 1855, type specimen (MNHN G 160) in dorsal view showing the current state of preservation; the original label reports 'Lignites de Muirancourt (Oise)'.
Figure 5 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 5. 'Crocodylus' depressifrons Blainville, 1855, specimen IRSNB R251 from Erquelinnes. A, B, photograph and interpretative drawing of the skull in dorsal view; C, D, anterior palatal region of the same specimen in ventral view. See main text for abbreviations.
Figure 1 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 1. 'Crocodylus' depressifrons Blainville, 1855, type specimens from 'Soissonnais', original drawings by Blainville (1855: plate 6), A, B, skull in dorsal and ventral view; C, D, right lower jaw in lateral view and enlarged detail of the symphysis in dorsal view, the arrows in (D) indicate the small and nearly confluent eight and ninth alveoli; E, F, skull in occipital and right lateral view; note that the reconstructed squamosal 'horns' are moderately developed in (E) but nearly flat in (F). The scale was not reported in the original drawing by Blainville but, on the basis of the remains still preserved in Paris (MNHN G 156, MNHN G 160), the total skull length can be estimated to be about 500 mm.
Figure 13 in A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium
Figure 13. 'Crocodylus' depressifrons Blainville, 1855, specimen IRSNB R253 from Orp-le-Grand. A, fragment (corresponding to the suborbital fenestra) of the right maxilla showing the position of the occlusal pits; B, detail of the symphysary area of the right lower jaw showing the splenial reaching but not entering the symphysis. See main text for abbreviations.
Figure 5. Internal choana, ventral view. A, AMNH 3101, Voay robustus. B, TMM m-1786, Crocodylus niloticus. C, AMNH 10083 in Morphology, relationships, and biogeographical significance of an extinct horned crocodile (Crocodylia, Crocodylidae) from the Quaternary of Madagascar
Figure 5. Internal choana, ventral view. A, AMNH 3101, Voay robustus. B, TMM m-1786, Crocodylus niloticus. C, AMNH 10083, Osteolaemus osborni (holotype). Scale = 1 cm.
Data from: Genetic and morphological evidence of a geographically widespread hybrid zone between two crocodile species, Crocodylus acutus and Crocodylus moreletii
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Out with the old, introgression with the new: Signals of ancient and recent admixture in hybridizing Mesoamerican crocodiles (Crocodylus acutus x Crocodylus moreletii)
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Data from: Phylogenomics reveals novel relationships among Neotropical crocodiles (Crocodylus spp.)
<p>Extant species in the order Crocodylia are remnants of an ancient lineage of large-bodied archosaur reptiles. Despite decades of systematic studies, phylogenetic relationships among members of the genus <i>Crocodylus</i> (true crocodiles) in the Neotropics are poorly understood. Here we estimated phylogenomic relationships among the four extant <i>Crocodylus </i>species in the Americas. Species-tree reconstructions using genotypic data from 17,538 SNPs collected for 33 individuals spanning six <i>Crocodylus </i>species (four ingroup and two outgroup) revealed novel relationships for all Neotropical species. For the first time, <i>C. acutus</i>, the American crocodile, was recovered as monophyletic when individuals from Antillean and continental populations were analyzed together. Our results also contradict previous inferences based on mitochondrial DNA data and a limited number of nuclear markers by robustly grouping Morelet's crocodile (<i>C. moreletii</i>) as the sister species to <i>C. acutus</i>., suggesting a novel phylogeographic hypothesis for the group. The present study punctuates the importance of using nuclear genome-wide information and representative sampling for resolving phylogenetic relationships, especially in broadly distributed species and those with complex evolutionary histories.</p>
Magnetic Resonance Imaging Scan of the Brain of a Nile Crocodile (Crocodylus niloticus)
<p>Magnetic Resonance Imaging Scan of the Brain of a Nile Crocodile (<i>Crocodylus niloticus</i>) from http://braincatalogue.org/Nile_crocodile</p>
Data from: Osteology of Crocodylus palaeindicus from the late Miocene–Pleistocene of South Asia and the phylogenetic relationships of crocodyloids
<p>Fossil crocodylian remains have been documented from India and other parts of South Asia since the mid-19th century, but specimens attributed to several extinct and extant species of Crocodylus have largely been neglected in modern taxonomic treatments. Here, we present a detailed anatomical description of the extinct species <em>Crocodylus palaeindicus</em>, which we restrict to the Late Miocene to early Middle Pleistocene of India. Using an autapomorphy-based approach to species-level identification, we regard Crocodylus sivalensis as a junior synonym of <em>C. palaeindicus</em>, and provide taxonomic reidentifications of all specimens previously referred to these two species. We present a new diagnosis for <em>C. palaeindicus</em> that facilitates its distinction from the extant mugger crocodile, <em>C. palustri</em>s, which does not unequivocally appear in the fossil record prior to the Pleistocene. The lack of clear spatiotemporal overlap, coupled with the otherwise lengthy ghost lineage implied by their sister taxon relationship in our phylogenetic analyses, provides tentative support that the extant species is either the descendant of <em>C. palaeindicus</em>, or originated via budding cladogenesis. An expanded phylogenetic analysis recovers the Late Miocene African <em>C. checchiai</em> and Pliocene South American <em>C. falconensis</em> as species within the Neotropical Crocodylus clade, supporting an African origin for this radiation. We also recover Kinyang, from the early–middle Miocene of Kenya, as a crocodyline, rather than an osteolaemine as originally described, and it is potentially the stratigraphically earliest known member of the Crocodylus lineage. Other notable results from our phylogenetic analyses suggest that crocodyloids might not have been present in North America prior to the late Neogene arrival of <em>Crocodylus</em>, with <em>Albertosuchus knudsenii</em>, <em>Prodiplocynodon langi</em>, and '<em>Crocodylus</em>' <em>affinis</em> all recovered outside of Crocodyloidea. Furthermore, we demonstrate that an alligatoroid placement for the recently erected latest Cretaceous–Paleogene East Asian clade Orientalosuchina is highly labile, with relationships at the 'base' of Crocodylia unstable.</p>
Figure 2 in The Nomenclature and Type Material of Crocodylus johnstoni (Krefft, 1873)
Figure 2. Dorsal view of holotype skin of Crocodilus johnsonii Krefft.
Figure 9. Image from Negative V342 in The Nomenclature and Type Material of Crocodylus johnstoni (Krefft, 1873)
Figure 9. Image from Negative V342 (Australian Museum Archives); dorsal
Figure 3 in The Nomenclature and Type Material of Crocodylus johnstoni (Krefft, 1873)
Figure 3. Left lateral view of holotype skin of Crocodilus johnsonii Krefft.
Fig. 3 in Population size, demography and diet of the Siamese crocodile, Crocodylus siamensis (Schneider, 1801) in the Mesangat Swamp in Kalimantan, Indonesia
Fig. 3. Correlation between total Crocodylus siamensis sightings and moon index.
Figure 4. The quadrate reveals a in First European evidence for transcontinental dispersal of Crocodylus (late Neogene of southern Italy)
Figure 4. The quadrate reveals a foramen aerum dis-
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