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193 results for “Thalattosuchia”
FIGURE 24 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)
FIGURE 24. Schematic drawings of metriorhynchid tail flukes, distal caudal columns and integumentary contours. A: Rhacheosaurus NHMUK R.3948, historical reconstruction (Andrews, 1913, figure A). B: Same specimen, outline from photograph (Figure 23B), with potential outlines of the upper lobe evaluated from textures on the fossil in visible light. C: Metriorhynchidae indet., LF 3474 (new specimen, Figure 4), with possible outlines for the upper lobe inferred from preserved edges. D: Proposed outline in ontogenetic stages with less pronounced tail bending (generalized sketch comparable to unpublished specimen, see text for further information). All drawn to similar size.
FIGURE 9 in A new species of Cricosaurus (Thalattosuchia, Metriorhynchidae) based upon a remarkably well-preserved skeleton from the Upper Jurassic of Germany
FIGURE 9. Comparison of crania of Late Jurassic Cricosaurus specimens from southern Germany. (A) BMMS-BK 1-2, holotype of Cricosaurus albersdoerferi sp. nov.; (B) NKMB-P-Watt14/274, holotype of Cricosaurus bambergensis; (C) SNSB-BSPG AS I 504, holotype of Cricosaurus elegans; (D) SMNS 9808, lectotype of Cricosaurus suevicus; (E) GPIT-PV-31381, referred specimen of Cricosaurus suevicus and (F) SMNS 7322, referred specimen of Cricosaurus suevicus. Scale bars equal 50 mm.
FIGURE 8 in A new species of Cricosaurus (Thalattosuchia, Metriorhynchidae) based upon a remarkably well-preserved skeleton from the Upper Jurassic of Germany
FIGURE 8. Strict consensus topologies of Metriorhynchinae found in the parsimony analyses. A, unweighted topology; B, strongly down-weighted topology (k=1); C, all other weighting analyses topology (k=3, 7, 10, 20, and 50).
FIGURE 10 in A new species of Cricosaurus (Thalattosuchia, Metriorhynchidae) based upon a remarkably well-preserved skeleton from the Upper Jurassic of Germany
FIGURE 10. Comparison of tail bends of Late Jurassic Cricosaurus specimens from southern Germany. (A) BMMS-BK 1-2, holotype of Cricosaurus albersdoerferi sp. nov.; (B) SMNS 9808, lectotype of Cricosaurus suevicus; (C) GPIT-PV- 31381, referred specimen of Cricosaurus suevicus; (D) NKMB-P-Watt14/274, holotype of Cricosaurus bambergensis. No scale bars intended.
FIGURE 5 in A new species of Cricosaurus (Thalattosuchia, Metriorhynchidae) based upon a remarkably well-preserved skeleton from the Upper Jurassic of Germany
FIGURE 5. Cricosaurus albersdoerferi sp. nov. (BMMS-BK 1-2) holotype, late Kimmeridgian of Painten (Southern Germany). Cervical (A); dorsal (B) and sacral vertebrae (C) in lateral view. Abbreviations: ans, axis neural spine; axp, axis postzygapophysis; axr, axis rib; cr, cervical rib; dia, diapophysis; ns, neural spine; pat, postzygapophysis of atlas; pp, parapophysis; sr, sacral rib; sv, sacral vertebra. Scale bars equal 30 mm.
FIGURE 2 in A new species of Cricosaurus (Thalattosuchia, Metriorhynchidae) based upon a remarkably well-preserved skeleton from the Upper Jurassic of Germany
FIGURE 2. Simplified stratigraphy of the Upper Jurassic in the eastern Franconian Jura, highlighting the fossil-bearing horizon (silhouette). The type locality within the Kelheim district is indicated by a black star.
Figure 6 in What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany
Figure 6. Comparative cranial morphology for species previously referred to as Geosaurus gracilis. A, Cricosaurus grandis holotype, BSPG AS-VI-1. B, Cricosaurus suevicus lectotype, SMNS 9808. C, Cricosaurus elegans holotype, BSPG AS I 504. D, Rhacheosaurus gracilis referred specimen, NHM R.3948. Note that R. gracilis has a more delicate skull, when compared with all of the other specimens, in addition to a slender rostrum. Scale bars: 20 mm.
Data from: What’s in an outgroup? The impact of outgroup choice on the phylogenetic position of Thalattosuchia (Crocodylomorpha) and the origin of Crocodyliformes
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Figure 24 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 24. Comparative plate of thalattosuchian pelvic girdles and hindlimbs. A, the teleosaurid teleosauroid Platysuchus multiscrobiculatus, holotype SMNS 9930; B, the machimosaurid teleosauroid Macrospondylus bollensis, referred specimen NMW 13445; C, the early diverging metriorhynchoid Pelagosaurus typus, referred specimen FWD 0784; D, the metriorhynchid Cricosaurus albersdoerferi, holotype BMMS-BK 1-2. All scale bars equal 10 cm. Highlighting the changes as thalattosuchians became increasingly aquatic, such as the loss of osteoderms, proportional reduction of the ilium and tibiae, strongly ventrally curved sacral ribs, and modification of the pes into a paddle.
Figure 22 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 22. Comparative plate of metriorhynchid skeletons. A, Thalattosuchus superciliosus, referred specimen GPIT-PV-31379; B, Rhacheosaurus gracilis, referred specimen NHMUK PV R 3948; C, Cricosaurus albersdoerferi, holotype BMMS-BK 1-2. All scale bars equal 30 cm.
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.
Figure 11. A in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 11. A, relative warps cranial morphology morphospace, delimited by the first two axes. B, shape changes corresponding to the mean shape, and the extremes of both of the first two axes.
Figure 10 in The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics
Figure 10. Dorsal view of a generalized metriorhynchid skull, with the landmarks measured shown (see Table 4). Image redrawn from Frey et al. (2002).
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