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16 results for “Chelonioidea”
Figure 2 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 2. Shellandpelvicgirdleelementsof Leviathanochelysaenigmatica gen. etsp. nov. (a) Dorsalviewof MCD9884 with the elements disposed as they were discovered, remarking in white the preserved carapace portion (MCD9884a). (b) Visceral view of the carapacewith asuperimposed interpretation of the shell elements. (c) Dorsal view of the preserved pelvic girdle without the carapace, and (d) ventral view of the same element with the carapace. Asterisk marks indicate the location of the autapomorphic accessory pubic process. Details of the accessory pubic process in (e) dorsal and (f) ventral view. (g) Close up view of the posteromedial part of the pubes, in ventral (upper picture) and posterior view (lower picture), preserving part of the thyroid fossae separated by a thick bone structure (black arrow). (h) Ventral view of the left acetabulum, illustrating the limits between the pelvic bones. (i) Detail of the outer ornamented surfaceof the ilium. (j) Histological section of the costal 8 (MCD9884.1), showing acancellous bone zone between the highly vascularized internal and external cortices. Abbreviations: (ac) Acetabulum; (app) Accessory Pubic Process; (cb) cancellous bone; (co) costal plate; (eco) External Cortex; (ico) Internal Cortex; (il) Ilium; (ils) ilium insertion scar; (isc) Ischium; (il) Ilium; (ne) neural plate; (pb) Pubis; (pbb) pubic bridge; (tf) Thyroid fossa.
Figure 1 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 1. GeographicandgeologicalsituationofCalTorrades. TheCalTorradesfossillocalitylocation, respect: (a) the Iberian Peninsula; and (b) the Eastern Pyrenees. (c) Simplified geological map including the locality (white star). (d) Field capture of Cal Torrades outcrop, marking with the star the location of the fossil remains: (e) pelvis; and (f) ilium. (g) Locality stratigraphic column with the geological materials and fossil remains. Modified from Costantinoand Angelini26,Vidal27 and free access digital mapsof the Institut de Cartografia i Geologia de Catalunya (ICGC; http://www.icc.cat/vissir3/).
Figure 3 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 3. Phylogeneticrelationshipof Leviathanochelysaenigmatica gen. etsp. nov. Simplifiedphylogenetic hypothesis of the relationship of Leviathanochelysaenigmatica within Pan-Chelonioidea based of 20 MPT with 1647 steps according to the Strict Consensus topology. Number under main branching nodes correlate with Bremer support values. Taxa are illustrated according to their time-range occurrence, but not to the timedivergence of the nodes which are tentatively placed according to fossil record evidences.
Figure 14. Pruned maximum credibility Bayesian trees. Dataset C in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 14. Pruned maximum credibility Bayesian trees. Dataset C based on the matrix from Evers & Benson (2019). Dataset D based on matrix from Evers & Benson (2019) with added characters found in this study. Colours at nodes represent base of clades. Numbers at the node show posterior probability value of node.
Figure 12 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 12. Ventro-posterior-lateral view of Natator depressus (WAM R112123) (A) to highlight the foramen jugulare posterious, and Eretmochelys imbricata (WAM R120113) (B) for comparison. Displaying the states of character 2 based on the descriptor in the Appendix. Abbreviations: bas.con, basioccipital condyle; fn.po, fenestra postotica; for.ju.po, foramen jugulare posterious; for.mag, foramen magnum; for.ner.hyp, foramen nervi hypoglossi; fpcci, foramen posterior canalis cartotici. Scale bars = 20mm.
Figure 13. Maximum credibility Bayesian trees. Dataset A in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 13. Maximum credibility Bayesian trees. Dataset A based on the matrix from Evers & Benson (2019). Dataset B based on matrix from Evers & Benson (2019) with added characters found in this study. Different colours at nodes represent base of clades. Numbers at the node show posterior probability value of node.
Figure 10 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 10. Antero-medial view of braincase of Natator depressus (WAM R112123) (A) and Lepidochelys olivacea (SAMA BM670) (B) showing the closed (A) and open (B) states of the medial foramen nervi acustici. Abbreviations: for.ner.ac, foramen nervi acustici; for.ner.hy, foramen nervi hypoglossi; hia.acu, hiatus acusticus. Scale bars = 20mm.
Figure 9 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 9. Parasagital cross-section of Natator depressus (WAM R112123). A, D, skull, exposing the lateral wall of the braincase. B, C, represent the lateral wall of the braincase of Chelonia mydas (SAMA Unregistered) and Lepidochelys olivacea (SAMA BM670), respectively. A, the original surface file; B, the surface file redrawn and labelled. Areas which are 'cut through' are shaded with diagonal lines. Displaying the states of characters 1, 3, 7, based on the descriptors in the Appendix. Abbreviations: BO, basioccipital; BS, basisphenoid; EPT, epipterygoid; EX, exoccipital; for.ner.hyp., foramen nervi hypoglossi; for.ner.tri., foramen nervi trigemini; for.jug.ant.,foramen jugulare anterius; hia.acu., hiatus acousticus; OP, opisthotic; PAR, parietal; PT, pterygoid; PRO, prootic: SUP, supraoccipital. Scale bars = 20mm.
Figure 7 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 7. Dorsal view of the mandibles of the five extant extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus (WAM R112123). B, Chelonia mydas (NHMUK 1969.776) C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SMNS 11070). E, Caretta caretta (SAM unregistered). Abbreviations: ANG, angular; ART, articular; COR, coronoid; DEN, dentary; fs.mk, fossa Makelii; Scale bar = 50mm.
Figure 4 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 4. Ventral view of the five genera of extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus (WAM R112123). B, Chelonia mydas (SAMA unregistered). C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SAMA BM670). E, Caretta caretta (SAM unregistered). Abbreviations: BO, basioccipital; BS, basisphenoid; EX, exoccipital; fo.te.in, fossa temporalis inferior; JUG, jugal; MX, maxilla; PAL, palatine; PMX, premaxilla; PT, pterygoid; QU, quadrate; VO, vomer. Scale bar = 50mm.
Figure 2 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 2. Lateral view of the five genera of extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus(WAM R112123). B, Chelonia mydas (SAMA unregistered). C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SAMA BM670). E, Caretta caretta (SAM unregistered). Displaying the states of characters 5, 6, 8, 9, 10, based on the descriptors in the Appendix. Abbreviations: FR, frontal; JUG, jugal; MX, maxilla; orb, orbital opening; PAR, parietal; PMX, premaxilla; PORB, postorbital; PRFR, prefrontal; QJ, quadratojugal; QU, quadrate; SQ, squamosal; su.ju.ri, superficial jugal ridge; SUP, supraoccipital. Scale bars = 50 mm.
Figure 6 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 6. Lateral and medial view of the five genera of the mandibles extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus (WAM R112123). B, Chelonia mydas (NHMUK 1969.776). C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SMNS 11070). E, Caretta caretta (SAM unregistered). Abbreviations: ANG, angular; ART, articular; COR, coranoid; DEN, dentary; for.dent.maj, foramen dento faciale majus; fs.mk, fossa Makelii; lb.rid, labial ridge; lin.ridge; lingual ridge; mek.gro, Meckelian groove; PRA, prearticular; SUR, surangular. Scale bar = 50mm.
Figure 1 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 1. The current consensus for the phylogenetic relationships between extant sea turtles. The different colours represent the base of the groups in extant sea turtles. Redrawn from Duchene et al., 2012. Silhouettes redrawn from Jones et al. (2012).
Figure 5 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 5. Posterior view of the five genera of extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus (WAM R112123). B, Chelonia mydas (SAMA unregistered). C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SAMA BM670). E, Caretta caretta (SAMA unregistered). Abbreviations: BO, basioccipital; EX, exoccipital; fn.po, fenestra postoticus; fr.mg, foramen magnum; fr.ner.hyp, foramen nervi hypoglossi; fs.te.su, fossa temporalis superior; OP, opsithotic; PR, prootic; PT, pterygoid; SQ, squamosal; SUP, supraoccipital. Scale bar = 50mm.
Figure 11 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 11. Antero-medial view of braincase of Natator depressus (WAM R112123) (A) and Lepidochelys olivacea (SAMA BM670) (B) illustrating the two states of the rostrum basisphenoidale, robust (A) and gracile (B). Displaying the states of character 4 based on the descriptor in the Appendix. Abbreviations: pro.ros.nas processus rostrum basisphenoidale; ros.bas, rostrum basisphenoidale. Scale bars = 20mm.
Figure 8 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)
Figure 8. Transverse cross sections Natator depressus (WAM R120113) cranium of the posterior portion of the skull (A) and of the nasal region moving anteriorly (B, C). Abbreviations: BO, basioccipital; cav.lab, cavum labrinthicum; fpcci, foramen posterior canalis cartotici interni; fos. nar, fossa nasalis; fos.orb.nas., fossa orbito-nasalis; int.nar., internal nares; MX, maxilla; OP, opsithotic; PAL, palatine; PAR, parietal; PRFR, prefrontal; PT, pterygoid; PT, pterygoid; VO, vomer. Scale bars are 50mm.
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