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Fig. 1 in Side-Necked Turtle Lower Jaws (Podocnemididae, Bothremydidae) from the Late Cretaceous Maevarano Formation of Madagascar
Fig. 1. Photographs of the lower jaw of cf. Erymnochelys, FMNH PR 2231. A, Dorsal view; B, ventral view; C, anterior view; D, right lateral view; E, medial view of right jaw; and F, medial view of left jaw. Scale bar equals 1 cm.
Fig. 3 in Side-Necked Turtle Lower Jaws (Podocnemididae, Bothremydidae) from the Late Cretaceous Maevarano Formation of Madagascar
Fig. 3. Photographs of the lower jaw of the extant Malagasy turtle Erymnochelys madagascariensis (Bavarian State Natural History Collection, Munich, no. 843/20, Mahajanga, Madagascar, collector Prof. Voeltzkow 1907). A, Dorsal view (see Gaffney and Zangerl, 1968: fig. 22C and E for comparable views of Bothremys); B, ventral view (see Gaffney and Zangerl, 1968: fig. 22A for comparable view of Bothremys); C, anterior view; D, right lateral view; E, medial view of right jaw; and F, medial view of left jaw. Scale bar equals 1 cm.
Fig. 2 in Side-Necked Turtle Lower Jaws (Podocnemididae, Bothremydidae) from the Late Cretaceous Maevarano Formation of Madagascar
Fig. 2. Drawings of the lower jaw of cf. Erymnochelys, FMNH PR 2231. A, Dorsal view; B, ventral view; C, anterior view; D, right lateral view; and E, medial view of right jaw. Scale bar equals 1 cm.
FIGURE 5 in Lower Jaw of Spathites (Ammonoidea: Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico
FIGURE 5. Three-dimensional reconstruction of the lower jaw of Spathites puercoensis (NMMNH P-79962) showing A, ventral and B, lateral views.
FIGURE 4 in Lower Jaw of Spathites (Ammonoidea: Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico
FIGURE 4. Cross section of a piece of the aptychus from the anterior edge of the left plate, with the outer (ventral) surface on top. A. The aptychus is 0.19 mm thick and consists of a very thin outer layer 7.7 µm thick and a thicker inner (dorsal) layer—the rest of the aptychus. B. Close-up of the bottom of the inner layer showing oblique laminations. C. Close-up of the middle of the inner layer showing massive microstructure. D. Close-up of the outer layer showing massive microstructure.
FIGURE 2. A in Lower Jaw of Spathites (Ammonoidea: Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico
FIGURE 2. A. Overview of New Mexico Museum of Natural History P-79962 showing the specimen of Spathites puercoensis (upper arrow) and the associated jaw (lower arrow). B. Close-up of the umbilical nodes (arrows) surrounding the umbilicus, which is a characteristic of this species. C. Whorl cross section at the base of the body chamber with the last septum of the phragmocone on top. D. Fragment of the apertural margin (arrow) of another specimen of S. puercoensis next to the aptychus. E. Close-up of the inflated apertural margin (arrow) and part of the shell covered with growth lines. Scale bar = 1 cm.
FIGURE 1 in Lower Jaw of Spathites (Ammonoidea: Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico
FIGURE 1. Map and stratigraphic section showing the locality of Spathites puercoensis (Herrick and Johnson, 1900) and its aptychus.
FIGURE 3. A in Lower Jaw of Spathites (Ammonoidea: Acanthoceratoidea) from the Upper Cretaceous (Turonian) of New Mexico
FIGURE 3. A. Ventral view of the lower jaw (arrows) comprising two calcareous plates (= the aptychus). B. Close-up of the median hinge (arrow) between the two calcareous plates. C. Close-up of the broadly concave anterior margin (arrow) of the left plate. D. Close-up of the posterior margin (arrow) of the left plate near the median hinge showing the comarginal ribs. Scale bar = 1 cm.
Text-fig. 7. Photo of a skull with lower jaw of a cave lion subadult female (registration number is Ok-139786), discovered in layer C of sector 4 of the Under the Ladder test pit. Photo by V. Káňa. in The Mammalian Fauna Of Barová Cave (Moravian Karst, The Czech Republic)
Text-fig. 7. Photo of a skull with lower jaw of a cave lion subadult female (registration number is Ok-139786), discovered in layer C of sector 4 of the Under the Ladder test pit. Photo by V. Káňa.
Fig. 32 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 32. Part and counterpart of a lower jaw attributed to Neogastroplites americanus (Reeside and Weymouth, 1931) var. A Reeside and Cobban, 1960, USNM 129548, Mowry Shale, Park County, Wyoming. A. Overall view of the negative half showing a slit at the apex (arrow), 31. B. Overall view of the positive half. The sides are bent dorsally and display longitudinal creases, 31. C. Closeup of the anterior area in A, 32.9.
Fig. 21 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 21. Drawing of BHMNH 5456 (see fig. 20). A. Hypothetical cross section (restored) near the apex. B. Closeup of anterior end showing an elongate boss and narrow ridge along the midline. The horizontal lines indicate the crystalline struts that cross the grooves. Texture as defined in figure 4.
Fig. 15 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 15. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, BHMNH 5041, Baculites cuneatus Zone, Pierre Shale, Meade County, South Dakota. A. Ventral view, anterior end on top, showing bilobate posterior margin. The specimen retains a strong convex curvature, presumably similar to that in life, 31. B. Right lateral view with the anterior end (arrow) to the right. The anterior margin is weakly indented and the apex is slightly projected, 31. C. Anterior view, 31. D. Closeup of the anterior end showing the outline of the outer lamella (arrow), 33.1.
Fig. 11 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 11. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, TMP 92.42.21, Baculites cuneatus Zone, Bearpaw Shale, Welling, Alberta, Canada, ventral view, anterior end on top. A. Overview showing most of the right wing. The arrow indicates the position of the apex, 31. B. Closeup of the anterior end, 33.
Fig. 12 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 12. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, TMP 99.84.2, Baculites cuneatus Zone, Bearpaw Shale, Welling, Alberta, Canada, ventral view, anterior end on top, 31.
Fig. 6 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 6. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, AMNH 47277, Baculites cuneatus Zone, Bearpaw Shale, Welling, Alberta, Canada, ventral view, anterior end on top. A. Coated. B. Uncoated. Part of the coarsely crystalline black material is missing exposing two radial ridges flanked by grooves (arrows), which are expressed as grooves and ridges, respectively, on the dorsal side, 31.
Fig. 3 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 3. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, AMNH 47275, Baculites cuneatus Zone, Bearpaw Shale, Welling, Alberta, Canada, ventral view, anterior on top. A. Overview showing the ragged posterior margin, 31. B. Closeup of the anterior end showing the apical slit and Ushaped outline of the junction between the inner and outer lamellae (arrow), 33.
Fig. 2 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 2. Diagram of upper and lower jaws illustrating terminology and measurements. A. Dorsal view of upper jaw. B. Ventral view of upper jaw. C. Ventral view of lower jaw. D. Dorsal view of lower jaw. Abbreviation: a 5 apical angle.
Fig. 5 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 5. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, AMNH 47276, Baculites cuneatus Zone, Bearpaw Shale, Welling, Alberta, Canada, ventral view, anterior end on top, showing the curved anterior margin, 31.
Fig. 8 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 8. Drawings of AMNH 47277 (see figs. 6, 7). A. Hypothetical cross section near the apex. B. Hypothetical cross section approximately 20 mm from the apex. The two lamellae are separated on each side of the midline but fused together along the lateral margins. C. Anterior end showing the Vshaped edge of the outer lamella. Texture as defined in figure 4.
Fig. 20 in Jaws of Late Cretaceous Placenticeratid Ammonites: How Preservation Affects the Interpretation of Morphology
Fig. 20. Lower jaw of Placenticeras meeki Böhm, 1898, or Placenticeras costatum Hyatt, 1903, BHMNH 5456, Baculites cuneatus Zone, Pierre Shale, Meade County, South Dakota, ventral view, anterior end on top. The upper arrow indicates the edge of the outer lamella. The lower arrow indicates the separation between the two lamellae, fortuitously exposed at a break in the jaw, 32.7.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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