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103 results for “Mesoeucrocodylia”
Figure 6 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 6. Lateral aspect cranial reconstructions, with the muscle line of action indicated: (A) Teleidosaurus calvadosii (modified from Eudes-Deslongchamps, 1867–1869); (B) Metriorhynchus superciliosus (composite based upon specimens from NHM and MNHN). The broken line represents the musculus pseudotemporalis–intramandibularis, whereas the solid black line is the musculus depressor mandibulae. The pterygoids are reconstructed based upon teleosaurids.
Figure 15 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 15. Rarefaction plots for two metrics (sum of ranges and sum of variances) that measure metriorhynchoid disparity (all taxa) throughout time. A, sum of ranges. B, sum of variances. The sum of variances shows little obvious relationship with sample size, in keeping with the theoretical robustness of the measure to differences in sample size (see Wills et al., 1994). The sum of ranges curve suggests that, although this measure is highly sensitive to sample size (Wills et al., 1994), the patterns for metriorhynchoids are robust. Notably, the relative ordering of disparity measures from high (Tithonian) to low (Bathonian) is seen at all sample sizes, from N = 3 upwards. Abbreviations: B, Bathonian; C, Callovian; EK, Early Cretaceous; K, Kimmeridgian; O, Oxfordian; T, Tithonian.
Figure 5 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 5. Postcranial marine adaptations of metriorhynchids (Rhacheosaurus gracilis NHM R.3948): (A) tail fluke with an impression of the fleshy upper lobe (the only specimen preserving this feature); (B) hindlimbs, note the high proportion that the pes makes, compared with the tibia–fibula, and how poorly developed the pelvis is.
Figure 8 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 8. Comparative metriorhynchid dental morphology: (A) in situ crowns of Geosaurus giganteus NHM R.1229; (B) isolated crown of Dakosaurus maximus HMN R.4313; (C) in situ crowns of Suchodus durobrivensis NHM R.2618; (D) isolated crown of Suchodus brachyrhynchus HMN R.3386.2; (E) in situ crowns of Cricosaurus schroederi MMGLV#; (F) isolated crowns of Metriorhynchus superciliosus NMW 19 96 G15a. Scale bars: 10 mm. We thank for N. Knötschke for photograph (E).
Figure 2 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 2. Strict consensus of Metriorhynchoidea from Young & Andrade (2009), calibrated by Tethys ammonite zones. See the Appendix for further details regarding genera and taxonomy.
Figure 17 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 17. von Mises stress contour plots for each taxon placed within the phylogenetic context. The left-hand models are those in dorsal aspect (with the appropriate scale), whereas those on the right are the lateral-aspect models (with their own respective scale).
Figure 14 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 14. The disparity (morphological diversity) of metriorhynchoids through time, based on two metrics (sum of ranges and sum of variances, derived from a PCO analysis; see text for details). A, B, disparity of all metriorhynchoids through time. C, D, disparity of metriorhynchines through time. E, F, disparity of geosaurines through time. Squares represent the disparity metric and error bars denote 95% confidence intervals, based on bootstrapping. There are no error bars for the Early Cretaceous geosaurines because of the small sample size (N = 2).
Figure 9 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 9. Species diversity of Metriorhynchoidea (both taxic and phylogenetically corrected) for each stage subdivision.
Figure 13 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 13. Principle coordinates cladistic character morphospace, delimited by the first two axes. The black ellipse contains the metriorhynchine taxa, whereas the grey ellipse contains the Geosaurinae.
Figure 12 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 12. Relative warps morphospace subdivided into three time bins: (A) Callovian; (B) Oxfordian–Kimmeridgian; (C) Tithonian–Berriasian.
FIGURE 1 in Montealtosuchus arrudacamposi, a new peirosaurid crocodile (Mesoeucrocodylia) from the Late Cretaceous Adamantina Formation of Brazil
FIGURE 1. Bauru Basin (modified from Fernandes & Coimbra, 1996)
Figure 8 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 8. Results of phylogenetic analysis. A, strict consensus of the 48 most parsimonious trees with all taxa included. Tree length is 548 steps, consistency index is 0.3923, retention index is 0.6623, and rescaled consistency index is 0.2598. Bootstrap support values are given above each branch for values greater than 50%. Bremer decay values are given below each branch. B, Adams consensus of the same set of trees with Adams decay values below each branch. C, strict consensus of the 138 most parsimonious trees of the reduced taxon set. Tree length is 540 steps, consistency index is 0.3981, retention index is 0.6546, and rescaled consistency index is 0.2606. Bootstrap support values greater than 50% are presented above each branch and Bremer decay values below each branch. D, Adams consensus of this set of trees with Adams decay values below each branch.
Figure 2. MCT 1723-R in New material of Pepesuchus (Crocodyliformes; Mesoeucrocodylia) from the Bauru Group: implications about its phylogeny and the age of the Adamantina Formation
Figure 2. MCT 1723-R, anterior portion of the rostrum. A, D, dorsal view. B, E, ventral view. C, F, left lateral view. Grey areas are associated sediments; hatched areas are broken parts. Scale bars represent 5 cm.
Figure 4. MCT 1723-R in New material of Pepesuchus (Crocodyliformes; Mesoeucrocodylia) from the Bauru Group: implications about its phylogeny and the age of the Adamantina Formation
Figure 4. MCT 1723-R, rostrum in lateral views. A, B, left lateral views. C, D, right lateral views. Grey areas are associated sediments; hatched areas are broken parts. Scale bars represent 5 cm.
Figure 6 in Description of a new specimen of Susisuchus anatoceps (Crocodylomorpha: Mesoeucrocodylia) from the Crato Formation (Santana Group) with comments on Neosuchia
Figure 6. Right humerus of Susisuchus anatoceps (MPSC-R1136). A, anterior view; B, posterior view; C, lateral view; D, medial view. Scale bars = 10 mm.
Figure 6 in A new Berriasian species of Goniopholis (Mesoeucrocodylia, Neosuchia) from England, and a review of the genus
Figure 6. Goniopholis kiplingi sp. nov. DORCM 12154 after extraction from its original slab (left), and reconstruction of the specimen (right), with interpretation of sutures and main structures of the skull. Note the evident ornamentation, almost completely composed of pits, and the elongated lachrymals. Scale bar = 20 mm. Abbreviations: Boc, basioccipital; CPN, perinarial crest; CLPO, lower periorbital crest; CUPO, upper periorbital crest; Eoc, exoccipital; FLT, laterotemporal fenestra; FoLac, lachrymal fossa; FoMX, maxillar fossa; FoPN, postnasal fossa; Fr, frontal; FST, supratemporal fenestra; Ju, jugal; Lac, lachrymal; Mx, maxilla; Na, nasal; Par, parietal; Prf, prefrontal; Pmx, premaxilla; Po, postorbital; Qj, quadrate-jugal; Qu, quadrate; Sq, squamosal.
Figure 4. Goniopholis simus, type specimen BMNH 41098 in A new Berriasian species of Goniopholis (Mesoeucrocodylia, Neosuchia) from England, and a review of the genus
Figure 4. Goniopholis simus, type specimen BMNH 41098 (A) and complementary slab BMNH 41098a (B), showing general features of the skull, including the palatines and perichoanal structures (C), and the frontal morphology at the transfrontal crest (D). Note the dorsal projection of the frontal at the medial line of the skull, indicated in D; and also the large amount of bony material in the complementary slab BMNH 41098a, holding part of the perinarial and periorbital crests, as well as a substantial part of the ornamentation. Abbreviations: FoST, supratemporal fossa; Fr, frontal; Mx, maxilla; Orb, orbit; Pal, palatine; Pt, pterygoid.
Figure 4 in A new cretaceous notosuchian (Mesoeucrocodylia) with bizarre dentition from Brazil
Figure 4. Detail of the symphysis of Labidiosuchus amicum gen. et sp. nov. (DGM 1480-R) in occlusal view. A, drawing; B, photograph showing the dentition. Abbreviations: d1-d8, dentary teeth 1 to 8. Scale bars = 5 mm.
Figure 2 in A new cretaceous notosuchian (Mesoeucrocodylia) with bizarre dentition from Brazil
Figure 2. Dorsal view of Labidiosuchus amicum gen. et sp. nov. mandible (DGM 1480-R). The white arrows indicate the anterior bifurcation of the surangular. Abbreviations: den, dentary; spl, splenial; sur, surangular. Scale bar = 10 mm.
Figure 1 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 1. Two extinct marine crocodylians, and an ichthyosaur, showing the extensive morphological adaptations to a pelagic lifestyle in metriorhynchids: Platysuchus SMNS 9930 (A), a teleosaurid, displays the comparatively heavier body typical of semi-aquatic teleosaurids, goniopholidids, pholidosaurids and eusuchians; in contrast to the hydrodynamic metriorhynchids, such as Cricosaurus suevicus SMNS 9808 (B). The ichthyosaur Stenopterygius SMNS 81841 (C) has similar adaptations to metriorhynchids, i.e. hydrofoil-like forelimbs, hypocercal tail, and the reduction in limb girdle size. Scale bar = 50 mm.
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