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FIGURE 3 in A large, pathological skeleton of Smilosuchus gregorii (Archosauriformes: Phytosauria) from the Upper Triassic of Arizona, U.S.A., with discussion of the paleobiological implications of paleopathology in fossil archosauromorphs

FIGURE 3. Nearly complete skull of USNM 18313 showing taxonomically relevant morphological details. (A) Stereopair of nearly complete skull in right dorsolateral view. (B) Stereopair of skull in posterior view. (C) Posterior portion of skull in dorsal view, with yellow line indicating ODCL. (D) Close-up of right squamosal region in posterior view. Abbeviations: aofe = antorbital fenestra; en = external naris; dps = descending process of squamosal; ltf = lateral temporal fenestra; lfm = lateral flare of maxilla; lfpm = lateral flare of premaxilla; nc = narial crest; ODCL = orbito-dorsal cranial length (after Hurlburt et al., 2003); o = orbit; rs = ridge on squamosal. Scale bars equal 5 cm.

FIGURE 5 in Tooth enamel microstructure in North American Phytosauria (Diapsida:Archosauriformes): Implications for biogeography and ecology of a Late Triassic clade of crocodylian-like predators

FIGURE 5. SEM captures of Smilosuchus teeth from the lower Chinle of New Mexico (4.1–2) and Arizona (4.3–6). 5A—NMMNH P-36146 type U tooth with well-developed columns; 5B—NMMNH P-36148 type B tooth in longitudinal view along the carina with faint LIGs in the inner half of the enamel; 5C—NMMNH 59648 type U tooth overview of transverse section showing the contributions of enamel and dentine to the fluting; 5D—NMMNH P-59648 type U tooth fluting along lingual surface; 5E—NMMNH P-59650 type B tooth along labial margin of enamel with well-developed columns; 5F—NMMNH P-59650 type B tooth along lingual margin of enamel. Scale bars for 5.1, 5.4–6 equal 50 µm, 5.2 scale bar equals 100 µm and 5.3 scale bar equals 2 mm.

FIGURE 7 in Tooth enamel microstructure in North American Phytosauria (Diapsida:Archosauriformes): Implications for biogeography and ecology of a Late Triassic clade of crocodylian-like predators

FIGURE 7. SEM captures of Machaeroprosopus teeth from the Petrified Forest Formation of New Mexico. 7A— NMMNH P-33103 type U tooth, overview of transverse cross-section; 7B—NMMNH P-33103 type U tooth with welldeveloped columns; 7C—NMMNH P-33103 type U tooth fluting with contribution solely from the enamel; 7D— NMMNH P-33105 type I tooth, overview of transverse cross-section; 7E—NMMNH P-33105 type I tooth denticle and maximum enamel thickness; 7F—NMMNH P-33105 type I tooth with well-developed columns. Both overview scale bars equal 2 mm. Enamel image scale bars equal 50 µm.

FIGURE 4 in Tooth enamel microstructure in North American Phytosauria (Diapsida:Archosauriformes): Implications for biogeography and ecology of a Late Triassic clade of crocodylian-like predators

FIGURE 4. SEM captures of Angistorhinus teeth from the Popo Agie Formation of Wyoming. 4A—NMMNH P-36190 type I tooth, transverse section across a denticle; 4B—NMMNH P-36190 type I tooth tangential view of enamel, polygonal columnar enamel packages evident on lower half of image; 4C—NMMNH P-36190 type I tooth enamel from labial margin of tooth; 4D—NMMNH P-36190 type I tooth enamel from lingual margin of tooth; 4E—NMMNH P-36192 type B tooth enamel preserves thin columnar packages; 4F—NMMNH P-36191 type B tooth with a few faint LIGs near OES. All scale bars equal 50 µm.

FIGURE 6 in Tooth enamel microstructure in North American Phytosauria (Diapsida:Archosauriformes): Implications for biogeography and ecology of a Late Triassic clade of crocodylian-like predators

FIGURE 6. SEM captures of "Rutiodon" teeth. 6A—NCSM 23303 type B tooth in transverse section with well-developed columns along lingual margin and abundant LIGs; 6B—NCSM 23303 type B tooth in transverse section with well-developed columns along labial margin and abundant LIGs; 6C—NCSM 24322A type U tooth in tangential section showing polygonal columnar packages ~10 µm above EDJ with abundant LIGs; 6D—NCSM 24322B type U tooth in longitudinal section showing minimum thickness of enamel along posterior margin just above tooth base with abundant LIGs; 6E—NCSM 25043 type C? tooth in transverse section with thin (~10 µm wide) well-developed columnar enamel with abundant LIGs in outer half of enamel; 6F—NCSM 25075 type I tooth in transverse section of well-developed columnar enamel with abundant LIGs. All scale bars equal 50 µm.

Figure 22 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 22. Archosauriform relationships with the inclusion of Vancleavea campi. The unique tree [12 taxa; 50 characters; characters weighted equally; one ordered (character 5); tree length, 67; consistency index (CI), 0.761; retention index (RI), 0.843]. Support values (left, bootstrap; right) are listed at each node.

Figure 20 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 20. Reconstruction of Vancleavea campi based on GR 138. The lateral, ventral, appendicular and neck osteoderms have been removed. The outline of the body and tail is based on the width of the osteoderms. Scale bar, 10 cm.

Figure 18 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 18. The articulated skeleton referred to Vancleavea campi (GR 138) covered in osteoderms. The enlarged drawings illustrate the five different morphologies of the osteoderms discussed in this paper: throat (A), ventral (B), appendicular (C), lateral (D) and dorsal caudal (E) osteoderms. The tail osteoderms and lateral and dorsal caudal osteoderms are highlighted (F). Scale bar, 10 cm for the skeleton. The osteoderms are not to scale.

Figure 17 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 17. Left ankle of Vancleavea campi (GR 138) in posterior/ventral (A), dorsal/posterior (B), ventral/anterior (C) and anterior/dorsal (D) views. Arrow indicates anterior direction. Scale bar, 1 cm.

Figure 16 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 16. Left femur of Vancleavea campi (GR 138) in lateral (A), medial (B), proximal (C) and distal (D) views. Scale bars, 1 cm.

Figure 19 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 19. Osteoderms from the various regions of Vancleavea campi (GR 138): ventral region (morphotype B) (A), neck region (morphotype A) (B), tail region (morphotype D) (C) and lateral side of the anterior portion of the tail (morphotype C) (D). Scale bars, 1 cm.

Figure 15 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 15. Left hindlimb of Vancleavea campi (GR 138). The hindlimb below the femur has been twisted by 180° where the lower portion of the leg is in anterior view. The metatarsals are labelled A–C and not 2–4 because they are disarticulated. Grey elements, appendicular osteoderms. Scale bar, 1 cm.

Figure 12 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 12. Left scapula of Vancleavea campi (GR 138) in lateral (A) and medial (B) views. Scale bar, 1 cm.

Figure 13 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 13. Left forelimb of Vancleavea campi (GR 138). The grey elements are appendicular osteoderms. Scale bar, 1 cm.

Figure 21 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 21. Femur (A) of Vancleavea campi (UCMP 152662) showing where the histological section was taken. A histological section of the femur was taken from the midshaft illustrating the complete section (B) and close-ups of the inner cortex (C), middle cortex (D) and outer cortex (E). Arrows indicate lines of arrested growth (LAGs). Scale bar, 1 cm.

Figure 14 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 14. Pelvis of Vancleavea campi. The left ilium, pubis and ischium (A) of the holotype (PEFO 2427) in lateral view compared with the complete left ilium (B) in lateral view of GR 138 and the right ischium (C) in lateral view of GR 139. Scale bars, 1 cm.

Figure 8 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 8. Close-ups of the right lateral view (A) of the braincase of Vancleavea campi (GR 138), the right lower temporal region (B) and the left lower temporal region (C). Scale bar, 1 cm.

Figure 9 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 9. Nearly complete basioccipital of Vancleavea campi (UCMP 165196) in ventral (A), dorsal (B), left lateral (C), anterior (D) and posterior (E) views. Scale bar, 1 cm.

Figure 6 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 6. Anterodorsal view of the nasal region of Vancleavea campi (GR 138). The anterodorsal processes of the premaxillae and the unpaired neomorphic bone prevent the nasals from contacting at the midline. Grey area indicates matrix. Scale bar, 1 cm.

Figure 4 in The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes)

Figure 4. Dentition of Vancleavea campi (GR 138). The dentition from the right side of the skull (A), and close-ups of the premaxillary caniniform tooth (B), the maxillary caniniform tooth (C) and the posteriormost teeth of the maxilla (D) of the left side. Scale bars, 1 cm.