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2,047 results for “turtles”
Fig. 7 in Turtle tracks from the Late Jurassic of Asturias, Spain
Fig. 7. Reconstructed trackways of Chelonipus torquatus Rühle von Liliestern, 1939 and Emydhipus cameroi Vidarte et al., 2003. The footprints produced as the trackmaker progresses through subsequent positions are shown. Position I and III represent the animal with all four feet on the ground in a complete step sequence.
Fig. 4 in Turtle tracks from the Late Jurassic of Asturias, Spain
Fig. 4. Schematic drawing of a surface with evident scratch marks from Oles. A manus−pes set is recognisable (m, manual print; p, pedal print). Specimen left in the outcrop.
Fig. 9 in Turtle tracks from the Late Jurassic of Asturias, Spain
Fig. 9. Trackways and isolated footprints of living terrestrial and semiaquatic turtles. A. Testudo hermanni in terrestrial walking on firm sand. B. Rhinoclemmys pulcherrima in bottom walking on soft mud. C. Emys orbicularis in bottom walking on very fine sand. D. Emys orbicularis in bottom walking (shallow water) on very fine sand. E. Emys orbicularis in terrestrial walking on firm very fine sand. F. Emys orbicularis in terrestrial walking on firm mud. G. Rhinoclemmys pulcherrima in terrestrial walking on soft mud. H. Cuora amboinensis in terrestrial walking on hard mud. I. Cuora amboinensis in terrestrial walking on very fine sand. (m, manual print; p, pedal print).
Fig. 2 in A basal eucryptodiran turtle "Sinemys" efremovi (= Wuguia efremovi) from the Early Cretaceous of China
Fig. 2. "Sinemys" efremovi Khosatzky, 1996, Toutunhe River area, southern Junggar Basin, Xinjiang−Uygur Autonomous Region, China; Hutubei Formation, Tugulu Group, Hauterivian– Barremian. A, B. PIN 5114−1 (holotype). A. Imprint of the ventral surface of the shell (PIN 5114−1/c) (internal core piece removed), photograph (A1) and explanatory drawing of the same (A2). B. Internal core of the shell (PIN 5114−1/b) in ventral view, photograph (B1) and explanatory drawing of the same (B2). C. PIN 5114−2, anterior part of the carapace in ventral aspect, photograph (C1) and explanatory drawing of the same (C2). Imprints of plates are filled with grey.
Fig. 1 in A basal eucryptodiran turtle "Sinemys" efremovi (= Wuguia efremovi) from the Early Cretaceous of China
Fig. 1. "Sinemys" efremovi Khosatzky, 1996, PIN 5114−1 (holotype), Toutunhe River area, southern Junggar Basin, Xinjiang−Uygur Autonomous Region, China; Hutubei Formation, Tugulu Group, Hauterivian–Barremian. A. Internal core (PIN 5114−1/b) plus imprint of the ventral surface of the shell (PIN 5114−1/c), photograph (A1) and explanatory drawing of the same (A2). B. Imprint of the dorsal surface of the shell (PIN 5114−1/a); photograph (B1) and explanatory drawing of the same (B2). Imprints of plates are filled with grey. Unknown structures in the suprapygal region indicated by question mark.
Fig. 2 in New species of Serpinema (Nematoda: Camallanidae) from the scorpion mud turtle Kinosternon scorpioides (Testudines: Kinosternidae) from eastern Amazon, Brazil
Fig. 2. Line drawings of Serpinema pelliculatus n. sp. (a) Posterior region of male, lateral view. (b) Posterior region of male, ventral view. (c) Spicule, ventral view. (d) Posterior region of female, lateral view. (e) Vulva, lateral view.
Fig. 1 in New species of Serpinema (Nematoda: Camallanidae) from the scorpion mud turtle Kinosternon scorpioides (Testudines: Kinosternidae) from eastern Amazon, Brazil
Fig. 1. Line drawings of Serpinema pelliculatus n. sp. (a) Anterior region of female, lateral view. (b) Anterior region of male, lateral view. (c) Buccal capsule of female, lateral view. (d) Buccal capsule of male, lateral view. (e) Basal ring, apical view. (f) Anterior curved sclerotized structures, lateral view. (g) Cephalic extremity of male, apical view (h) Trident of male, ventral view. (i) Buccal capsule of male, apical view.
Fig. 3 in New species of Serpinema (Nematoda: Camallanidae) from the scorpion mud turtle Kinosternon scorpioides (Testudines: Kinosternidae) from eastern Amazon, Brazil
Fig. 3. Scanning electron microscopy of Serpinema pelliculatus n. sp. (a) Anterior end of male, subventral view; (b) Vulva, subventral view. (c) Posterior region of female, ventral view. (d) Tip tail of female, ventrolateral view. (e) Posterior region of male, subventral view (arrowheads indicate papillae). Abbreviations: anterior lip, Al; anus, An; posterior lip, Pl; trident, Tr.
Fig. 4 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 4. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. A. Specimen TMM 43670−2, photograph (A1) and explanatory drawing (A2) of the skull in rostral (A1, A2) and lateral (A3, A4) views. B. Specimen MCZ 8917, skull in occipital view. Photographs (A1, A3, B1) and explanatory drawings (A2, A4, B2).
Fig. 1 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 1. The localities of the Early Jurassic Kayenta Formation (Glen Canyon Group) where specimens of Kayentachelys aprix have been recovered: Gold Springs and Willow Springs, both Adeii Eechii Cliffs, Coconino County, Arizona, USA.
Fig. 10 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 10. Main hypotheses of turtle evolution. A. Joyce (2007). B. Gaffney et al. (2007). Outlined shapes document character evolution according to Gaffney (1996) and Gaffney et al. (2007). Solid shapes document the character evolution according the interpretations argued in the present paper. Dashes indicate character changes that are the same in both interpretations. Abbreviations: Kal., Kallokibotion; Mong., Mongolochelys; Pa., Palaeochersis; Pr., Proganochelys; Pro., Proterochersis.
Fig. 2 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 2. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, specimen TMM 43651−1, from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. The scale areas (numbered) of the anterior part of the skull roof; photograph (A) and explanatory drawing (B).
Fig. 3 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 3. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, specimen MNA V1558 (also catalogued as MCZ 8913), from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. Skull in dorsal view; photograph (A) and explanatory drawing (B).
Fig. 9 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 9. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. A. MCZ 8914, right lower jaw and part of the left dentary in lateral view; photograph (A1) and explanatory drawing (A2). B. MCZ 8915, right lower jaw medial view, with the left lower jaw conceptually removed; photograph (B1) and explanatory drawing (B2). C. MCZ 8916, mandibular articulation in dorsal view; photograph (C1) and explanatory drawing (C2).
Fig. 6 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 6. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, specimen TMM 43670−2, from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. Skull in lateroanterior (A, B) and posterior (C, D) views; stereophotographs (A), photograph (C) and explanatory drawings (B, D).
Fig. 8 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix
Fig. 8. The turtle Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987, specimen TMM 43653−1, from the Early Jurassic Kayenta Formation, Gold Springs, Arizona, USA. Basicranium in anterodorsal view; stereophotographs (A) and explanatory drawing (B).
Fig. 2 in Carapace bone histology in the giant pleurodiran turtle Stupendemys geographicus: Phylogeny and function
Fig. 2. Selected photographs of the thin−sections used in this study in normal light. Cortical thicknesses are marked with a bracket. A. Neural of Stupendemys geographicus Wood, 1976 (UNEFM−101), late Miocene Urumaco Fm., Venezuela, South America. Internal and external cortices are of similar thickness. B. Costal fragment A of Stupendemys geographicus Wood, 1976 (UNEFM−CIAPP−2002−01; same provenance as in A). The plane of sectioning is perpendicular to the long−axis of the carapace (L−section). Both cortices are not clearly defined (signalized with question marks) due to diagenetic processes. C. Neural and costal (YPM 11853) of Podocnemis erythrocephala (Spix, 1824), Recent red−headed Amazon River turtle, South America (provenance unknown). Both cortices are of similar thickness. D. Costal (FM P27406) of Bothremys barberi (Schmidt, 1940), Campanian (Late Cretaceous) Mooreville Chalk, Selma Group, Dallas County, Alabama, USA. The internal cortex is reduced. E. Neural (YPM 40288) of Taphrosphys sulcatus (Leidy, 1856), Late Cretaceous, New Jersey, USA. The internal cortex is reduced. F. Plastral fragment (?hyo− or hypoplastron, IPB R559a) of "Foxemys cf. F. mechinorum", Late Cretaceous (early Maastrichtian), Cruzy, Hérault, southern France. The internal cortex is reduced. G. Drilled core of costal (MVZ 230517) of Pelomedusa subrufa (Bonnaterre, 1789), a Recent African helmeted turtle (provenance unknown). The keratinous shield still covers the bone. H. Xiphiplastron of Hesperotestudo (Caudochelys) crassiscutata (Leidy, 1889) (ROM 55400), Pleistocene, Florida, USA. Internal and external cortices that frame cancellous bone are of equal thickness. I. Shell element (YPM 1783) of Archelon ischyros Wieland, 1896, Late Cretaceous, South Dakota, USA. The bone tissue is uniformly cancellous. Abbreviations: CB, cancellous bone; ECO, external cortex; ICO, internal cortex; KS, keratinous shield. Scale bars 10 mm.
Fig. 6 in Carapace bone histology in the giant pleurodiran turtle Stupendemys geographicus: Phylogeny and function
Fig. 6. Bone histology of Pelomedusa subrufa (Bonnaterre, 1789); Recent, Africa (provenance unknown). Thin−section of a sampled costal (MVZ 230517). A. The whole of the thin−section observed in polarized light. The diploe build of the shell is apparent below a keratinous shield (see also Fig. 2G). Only a thin layer of connective tissue is present in between the shield tissue and the bone tissue. The plane of sectioning lies perpendicular to the incorporated rib in the costal. In the thin−section, the former rib is only seen as a dorsoventrally thickened amount of cancellous bone and the slightly curved internal cortex. B. Detail of the external cortex of the costal in polarized light where the interwoven fiber bundles are interspersed with primary osteons. Bone cell lacunae that appear within the whole of the cortical bone are rather of round shapes. C. Detail of the parallel−fibered bone of the internal cortex of the costal. Below the surface of the bone, a thin layer of fibrous connective tissue is still present. Abbreviations: CL, bone cell lacunae; CT, connective tissue; ECO, external cortex; ICO, internal cortex; ISF, interwoven structural collagenous fiber bundles; KS, keratinous shield; PFB, parallel−fibered bone; PO, primary osteon, SF, structural collagenous fiber bundles; TR, bone trabeculae.
Fig. 4 in Carapace bone histology in the giant pleurodiran turtle Stupendemys geographicus: Phylogeny and function
Fig. 4. Bone histology of Podocnemis erythrocephala (Spix, 1824). Sampled costal (YPM 11853) of Podocnemis erythrocephala (Spix, 1824), the Recent red−headed Amazon River turtle, South America (provenance unknown). A. Photomicrograph of thin−section in polarized light. The diploe structure of the shell is clearly visible. Cortices are of similar size and show growth marks. The interior cancellous bone is largely remodeled by secondary osteons. B. Detail of external cortex in polarized light showing a succession of growth marks (small white arrows) in the interwoven fibrous bone tissue disturbed by a semicircular area of secondary bone remodeling. C. Close−up of the margin of remodeled area seen in B in normal transmitted light. Note the scalloped line and adjacent bone cell lacunae between the primary tissue with growth marks and the secondary bone. D. Same view as in C, seen in polarized light. The Ą
Fig. 7 in Carapace bone histology in the giant pleurodiran turtle Stupendemys geographicus: Phylogeny and function
Fig. 7. Bone histology of Hesperotestudo (Caudochelys) crassiscutata (Leidy, 1889) and Archelon ischyros Wieland, 1896. A. Sampled costal (ROM 55400) of Hesperotestudo (Caudochelys) crassiscutata (Leidy, 1889), Pleistocene of Florida, USA. A1. External cortex observed in normal transmitted light. Vascularization of the cortical bone is observed in form of primary osteons and straight or branching primary canals. Larger scattered secondary osteons are only developed in the direct vicinity of the interior cancellous bone A2. Same detail as in A1, observed in polarized light. Interwoven structural fiber bundles appear like a closely knit fabric. Note how some primary osteons trend almost perpendicular to the surface of the bone. A3. Internal cortex observed in normal light. Note that the layers next to the surface of the bone are sparsely vascularized. Rounded bone cell lacunae appear in clusters in the
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
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