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FIG. 15 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 15. — Pelvic girdle of Thalattosuchus superciliosus (Blainville, 1853), NHMUK PV R 2054: A, lateral view; B, anterior view; C, ventral view; D, dorsal view. Target indicates anterior. Arrow points anteriorly. The right ilium, ischium and pubis are mirrored. Scale bar: 5 cm.

FIG. 1 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 1. — Schematic representation of a dyrosaurid, Cerrejonisuchus improcerus Hastings, Bloch, Cadena & Jaramillo, 2010, illustrating the conventions of bone orientation based on the presumed resting pose of said taxa. Anterior-Posterior: anterior relates to any part closer to the front of the animal than the rear, and posterior relates to any part closer to the rear of the animal than its front; Dorsal-Ventral: dorsal relates to any part closer to the back of the animal than to the abdomen, and ventral relates to any part closer to the abdominal side of the animal than to its vertebra;Medial-Lateral: medial relates to any part closer to the centre of the animal (i.e. the sagittal or bilateral plane) than to its flanks, and lateral relates to any part situated further away from the centre of the animal. Artwork by I.S.

FIG. 4. — 3D in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 4. — 3D models of thalattosuchian pubes illustrating the difference between shaft and neck: A, B, right pubis of Suchodus durobrivensis Lydekker, 1890, NHMUK PV R 2618; C, D, right pubis of Thalattosuchus superciliosus (Blainville in Eudes-Deslongchamps & Blainville, 1852), NHMUK PV R 2054. Scale bars: 1 cm.

FIG. 20 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 20. — Pelvic and thoracic girdle elements of Cricosaurus albersdoerferi (Sachs, Young, Abel & Mallison, 2021) (Sachs et al. 2021), BMMS-BK 1-2 (holotype): A, pelvic girdle and hindlimb; B, thoracic girdle and forelimb. Modified from Sachs et al. (2021). Scale bars: 1 cm.

FIG. 5. — A in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 5. — A metriorhynchoid schematic pelvic girdle in lateral view, based on 'Metriorhynchus' brachyrhynchus (Eudes-Deslongchamps, 1867) (NHMUK PV R 3804, holotype of 'Metriorhynchus' cultridens & NHMUK PV R 4763): A, pelvic girdle with associated vocabulary; B, C, reconstruction of the soft tissues, based on the work of Tsai & Holliday (2015). Scale bars: 1 cm.

FIG. 3 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 3. — Schematic left metriorhynchoid pelvic girdle in lateral view as laying on a flat surface (based on the reconstruction of 'Metriorhynchus' brachyrhynchus (Eudes-Deslongchamps, 1867) [specimen NHMUK PV R 3804, holotype of 'Metriorhynchus' cultridens & NHMUK PV R 4763] from below) illustrating the orientation of each bone: A, ilium; B, ischium; C, pubis. Scale bars: 1 cm.

FIG. 11 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 11. — Pelvic girdle elements of Pelagosaurus typus Bronn, 1841: A, B, BRLSI M.1417.1; A, left ilium in lateral view; B, left ilium in medial view; C, BRLSI M.1410, left ischium in lateral view; D, BRLSI M.1420, right pubis in posterior view. Cross indicates posterior. Arrow points anteriorly. Scale bars: 1 cm.

FIG. 21 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 21. — Pelvic and thoracic girdle elements of Cricosaurus bambergensis (Sachs, Young, Abel & Mallison, 2019) (Sachs et al. 2019), NKMB-P-Watt14/274 (holotype): A, overview of pelvic girdle and hindlimb; B, overview of thoracic girdle and forelimb; C, detail of pelvic girdle. Modified from Sachs et al. (2019). Scale bars: 1 cm.

FIG. 17 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 17. — Left ilium of Cricosaurus araucanensis (Gasparini & Dellapé, 1976), MLP 72-IV-7-1 (holotype) and right ischium and left pubis of MLP 72-II-27-6 (referred): A, left ilium of MLP 72-IV-7-1 in lateral view; B, left ischium of MLP 72-IV-7-1 in lateral view; C, left ischium of MLP 72-II-27-6 in medial view; D, left pubis of MLP 72-II-27-6 in anterior view. Arrow points anteriorly. Target indicates anterior. Pictures of Cricosaurus araucanensis (MLP 72-IV-7-1 and MLP 72-II-27-6), courtesy of Dr Yanina Herrera. Scale bars: 1 cm.

FIG. 7 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 7. — Snapshot of the pelvic girdle of the alligatoroid Palaeosuchus palpebrosus (Cuvier, 1807), RVC-JRH-PP1: A, in anterior view; B, in lateral view. Note the orientation of the pubes. Cross indicates posterior view. Arrow points anteriorly. CT scan courtesy of Professor John Hutchinson (see https://skfb.ly/6ByyV). Scale bars: 1 mm.

FIG. 13 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 13. — Pelvic girdle elements of Thalattosuchus superciliosus (Blainville, 1853), NHMUK PV R 2054: A, left ilium in lateral view; B, left ischium in lateral view; C, left pubis in lateral view; D, right pubis in anterior view; E, left pubis in anterior view; F, left ilium in medial view. Target indicates anterior. Arrow points anteriorly. Scale bars: 1 cm.

FIG. 6 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 6. — Reconstruction of the pelvic girdle in anterior view of Suchodus durobrivensis Lydekker, 1890, NHMUK PV R 2618: A, erroneous reconstruction based on the hypothesis of a short pubic symphysis (orange) similar to extant crocodylians; B, legitimate reconstruction based on the hypothesis of a long pubic symphysis (orange) as opposed to extant crocodylians; C, right ilium, second sacral, and left pubis in anterior view; D, snapshot in anterior view of the pelvic girdle of the alligatoroid Palaeosuchus palpebrosus Cuvier, 1807 (RVC-JRH-PP1, Fig. 7). Pubes are colored in black. CT scan courtesy of Professor John Hutchinson (see https://skfb.ly/6ByyV). Target indicates anterior. Scale bars: 1 cm.

FIG. 16 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 16. — Left ilium of Cricosaurus araucanensis (Gasparini & Dellapé, 1976), MLP 72-IV-7-1 (holotype): A, lateral view; B, medial view; C, dorsal view; D, anterior view. Arrow points anteriorly. Target indicates anterior. 3D models of Cricosaurus araucanensis (MLP 72-IV-7-1), courtesy of Dr Yanina Herrera. Scale bar: 1 cm.

FIG. 2. — 3D in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)

FIG. 2. — 3D model of the skeleton of the holotype Congosaurus bequaerti Dollo, 1914 illustrating the conventions of bone orientation used in the following text: A, diagonally oriented to illustrate both the sagittal and coronal plane; B, in dorsal view to illustrate the coronal plane; C, in lateral view to illustrate the sagittal plane.

FIGURE 27 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 27. Aeolodon priscus, JME (uncatalogued, firmly installed in the permanent exhibition). A: Distal tail portion preserving enlarged rhomboidal scutes on dorsal edge (arrows mark dorsal points of transversal hinges); width of frame equals 15 cm. B: Skin preservation around the hollow of the knee (femur visible in left lower corner), with patches of distinct rhomboidal scutes (arrows mark example of hinge orientation); width of frame equals 23.5 cm. C: Webbing of foot with stretched polygonal scutes; width of frame equals 15.8 cm.

FIGURE 20 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 20. Cricosaurus bambergensis, NKMB-P-Watt14/274, body trunk portion with folded skin (upper red margin) embedding dorsal column. In the lower right corner, gut contents preserved a crustacean (arrow marking hinge between carapace and abdomen). Width of frame equals approximately 9 cm.

FIGURE 19 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 19. Cricosaurus bambergensis, NKMB-P-Watt14/274, skin preservation in dorsal neck, illustrating transversal fibers. Width of frame equals approximately 5.5 cm.

FIGURE 16 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 16. Cricosaurus albersdoerferi, BMMS-BK 1-2, soft tissue patch under UV, with yellowish areas indicating skin preservation. The posterior skull can be seen on the left, the scapulocoracoid on the lower right. Width of frame equals approximately 23.0 cm.

FIGURE 15 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 15. Metriorhynchidae indet., NKMB-P-Watt06/508, UV close-ups of skin surrounding the middle tail. A: Dorsal region with numerous knob-like irregularities. Width of frame equals approximately 10.1 cm. B: Ventral region with longitudinal folding (by skin substance preservation or imprints), and further irregularities. Width of frame equals approximately 18.0 cm.

FIGURE 9 in The integument of pelagic crocodylomorphs (Thalattosuchia: Metriorhynchidae)

FIGURE 9. Dakosaurus sp., DMA-JP-2009/001, UV image of tail portion with the highest concentration of skin irregularities (arrows; see previous figures). Width of frame equals approximately 28.0 cm.