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156 results for “bone histology”
FIGURE 4 in Testing hypothesis of skeletal unity using bone histology: The case of the sauropod remains from the Howe-Stephens and Howe Scott quarries (Morrison Formation, Wyoming, USA)
FIGURE 4. Growth marks preserved in the femur of SMA 0087 "Chris". To study the cyclicity, all growth marks are considered. Multiple, closely spaced LAGs (arrows) were counted as one growth mark.
FIGURE 10 in Testing hypothesis of skeletal unity using bone histology: The case of the sauropod remains from the Howe-Stephens and Howe Scott quarries (Morrison Formation, Wyoming, USA)
FIGURE 10. Band of secondary osteons in humerus SMA G50/91-1. The band of secondary osteons is located between the red lines. The area above the band of secondary osteons, marked by the dashed red line, consists of mainly primary bone with some isolated secondary osteons. In this area however, the density of secondary osteons is much lower than that seen in the secondary osteon band. Abbreviations; MC: Medullary cavity, RA: Remodeled area, SOB: Secondary osteon band.
FIGURE 6 in Testing hypothesis of skeletal unity using bone histology: The case of the sauropod remains from the Howe-Stephens and Howe Scott quarries (Morrison Formation, Wyoming, USA)
FIGURE 6. Images of all samples taken from SMA 0007 "XL". A, humerus (r). B, ulna (l). C, tibia (?). For all samples, the bone tissue types are indicated to the left, and the number and patterns of the visible growth cycles are indicated to the right. Abbreviations; E: Bone tissue type E, EFS: External fundamental system, F: Bone tissue type F, MC: Medullary cavity, RA: Remodeled area.
FIGURE 19 in Testing hypothesis of skeletal unity using bone histology: The case of the sauropod remains from the Howe-Stephens and Howe Scott quarries (Morrison Formation, Wyoming, USA)
FIGURE 19. Mounted skeleton of Galeamopus sp. SMA 0011 "Max" from Howe Scott Quarry (Howe Ranch, Wyoming, USA) on display at Sauriermuseum Aathal, Switzerland. Length of femur is 1490 mm. Image credit: Urs Möckli, Sauriermuseum Aathal.
FIGURE 8 in Testing hypothesis of skeletal unity using bone histology: The case of the sauropod remains from the Howe-Stephens and Howe Scott quarries (Morrison Formation, Wyoming, USA)
FIGURE 8. View of outer cortex of SMA 0015 "David" femur with the characteristic orange, diagenetic coloration which can be observed in all the SMA 0015 "David" samples. This image was taken from the outer cortex of SMA 0015 "David" femur.
FIGURE 2 in Bone histology reveals the first record of titanosaur (Dinosauria: Sauropoda) from the Late Cretaceous of Bulgaria
FIGURE 2. Geology, lithology and stratigraphy of the dinosaur bone locality at Vrabchov dol. 1, General view of the fossil-bearing sediments in the gully of Vrabchov dol yielding the dinosaur material. The yellow rectangle marks the sedimentary section illustrated on Figure 2.3; 2, Detail of the outcrop with position of one of the studied bone fragments (A; specimen NMNHS FR-16) and additional tetrapod remains (B). Scale bar equals 1 m; 3. Lithostratigraphic column of the Late Cretaceous sedimentary succession outcropping at the locality.
FIGURE 3. Fossilized bone fragments for the Vrabchov dol. 1 in Bone histology reveals the first record of titanosaur (Dinosauria: Sauropoda) from the Late Cretaceous of Bulgaria
FIGURE 3. Fossilized bone fragments for the Vrabchov dol. 1, Multiple views of specimen U.S., K21586, an undetermined long bone diaphyseal fragment; 2. Specimen NMNHS FR-16, possibly a partial diaphysis of undetermined long bone. Scale bar equals 3 cm.
FIG. 11 in New material of Mongolemys elegans Khosatzky and Mlynarski, 1971 (Testudines: Lindholmemydidae), from the Late Cretaceous of Mongolia with comments on bone histology and phylogeny
FIG. 11. Type of bone layer vs. log-transformed value for volumetric osteocytes density (lnVOD(#O/mm3)) for adult, juvenile, and hatching specimens of Mongolemys elegans. Abbreviations: cb, cancellous bone; ec, external cortex; ic, internal cortex.
FIG. 7. Mongolemys elegans IGM 90 in New material of Mongolemys elegans Khosatzky and Mlynarski, 1971 (Testudines: Lindholmemydidae), from the Late Cretaceous of Mongolia with comments on bone histology and phylogeny
FIG. 7. Mongolemys elegans IGM 90/12, posterolateral portion of an articulated adult shell: A, C, dorsal view; B, D, ventral view. E, Close up of a small region of the hyoplastron, showing excellent preservation of the microsculptural branchi sulci texture. Abbreviations: see figure 4. Labels in bold indicate scales.
Fig. 5 in Fossil bone histology reveals ancient origins for rapid juvenile growth in tetrapods
Fig. 5 Comparative schematic of the organization of bone tissue in two Carboniferous stem tetrapods, Whatcheeria and Greererpeton, throughout ontogeny. Whatcheeria (a–d) is a large-bodied predator whose juvenile growth is characterized by fibrolamellar bone (a) that is eventually remodeled and completely replaced with parallel-fibered tissue (b, c) and subsequent slow deposition of lamellar bone (c, d). By contrast, Greererpeton37 (e–g) is characterized by moderately paced bone deposition, even early in ontogeny (e), with a distinct lamellar band of bone deposited at the late juvenile stage (e–g). Sub-adult growth in Greererpeton is subsequently characterized by slowly deposited tissues (f) as well as endosteal deposition that results in a particularly thick adult cortex (g). Scale bar = 5 mm.
Figure 4. – Lepisosteus platostomus. A-C in Histological characteristics of lower jaw bones and oral teeth of the short nose gar, Lepisosteus platostomus Rafinesque, 1820 (Lepisosteidae)
Figure 4. – Lepisosteus platostomus. A-C: Lower right jaw, transverse sections, natural transmitted light. A: Dentary. Primary bone with canaliculi of Williamson is dominating but with some areas of secondary bone around some vascular cavities. A patch of multilayered ganoine is seen (white asterisk) and the white arrowheads point to small secondary vascular canals. Scale bar = 50 μm. B: Detail of the inset 1 of Fig. 4A showing primary bone (bo) and secondary bone (black asterisks) with canaliculi of Williamson (arrowheads) present in the two types of bone tissues. Scale bar = 50 μm. C: Detail of the inset 2 of Fig. 4A showing several ramified canaliculi of Williamson (arrowheads). Scale bar = 50 μm. D: Scale. Transverse section, natural transmitted light. The bony basal plate (bp) shows the canaliculi of Williamson that are relatively parallel and with very few branchings. (G = ganoine). Scale bar = 200 μm. E: Coronoid bone. Detail of bony tissue showing several osteocytes (arrows) with their canaliculi. Scale bar = 10 μm. F: Coronoid bone. Detail of the base of a tooth (de) showing attachment bone (ab), primary bone (bo) and a vascular canal (vc) surrounded by secondary bone that is discordant (arrowheads) relatively to the primary bone. Scale bar = 5 μm.
Figure 1 in Histological characteristics of lower jaw bones and oral teeth of the short nose gar, Lepisosteus platostomus Rafinesque, 1820 (Lepisosteidae)
Figure 1. – Lepisosteus platostomus. Tomographic image of a fang (black asterisk), and a mid-sized caniniform teeth (white asterisk) in the anterior part of the left lower jaw. The tridimensional reconstruction of the dentary bone and teeth shows three folds in the internal wall of the fang (arrows), which occupy two thirds of the pulp cavity. The space indicated by arrows between the narrow walls of each fold corresponds to external area of the tooth due to the synchronized folding of both the dentine and the collar enamel. The pulp cavity of the second tooth also shows two folds (arrowheads) along the vertical axis of the shaft. Scale bar = 500 μm. (from Germain et al., 2016: fig. 1).
Figure 2. – Lepidonotothen squamifrons. A in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)
Figure 2. – Lepidonotothen squamifrons. A: Cross section of the premaxilla (microradiography). B: Cross section of the dental (microradiography). C: Cross section of a dorsal spiny ray (microradiography). D: Cross section of a caudal vertebra (microradiography) showing the numerous vertebral bony arches fixed on the centrum. E: Detail of a section of a caudal vertebra (Polarized light showing the fibrous organization of bone and two vascular canals (arrowheads). F: Same section than Fig. E observed in transmitted natural light. The vascular canals are surround- ed by a reversal line (arrows). G: Detail of a section (polarized light) in a vertebral centrum showing growth marks. Scale bars: A = 500 μm; B = 250 μm; C, D, E, F = 200 μm; G = 50 μm. A: 415 mm TL; B-D, G: 333 mm TL; E, F: 250 mm TL.
Figure 3. – Lepidonotothen squamifrons. A in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)
Figure 3. – Lepidonotothen squamifrons. A: Horizontal section (microradiography) showing several cross sections of teeth on the right and the lower jaw on the left. B: Horizontal section (microradiography) taken lower than Fig. A. The wall of the pulp cavity of the central tooth (*) is crossed by vascular canals. We can see three very young non-functional teeth (arrowheads). C: Cross section of the lower jaw (microradiography) showing a young erupted tooth (arrow) and a fall- en tooth (*). D: Detail of a functional tooth showing the unmineralized ligament (arrowhead). E: Cross section of the jaw showing a tooth bud inserted in an alveola (arrow), beside a functional tooth (arrowhead). F, G: Cross section of a tooth (respectively in transmitted natural and polarized light. The more lateral dentinous tissue is striated, indi- cating the presence of odontoblastic canaliculi. (Scale bars: A, D = 250 μm; B, F, G = 150 μm; C = 500 μm; E = 1 mm. (A, B, F, G: 259 mm TL; C: 415 mm TL; D, E: 190 mm TL).
Fig. 4 in Growth and life habits of the Triassic cynodont Trirachodon, inferred from bone histology
Fig. 4. Transverse sections showing the bone histology of the Trirachodon scapula and rib. A. Scapula (SAM−PK−K5881g) where a LAG (arrowhead) is observed at the sub−periosteal surface. Moderately vascularized fibrolamellar bone becomes less vascularized towards the periphery. B. Rib (SAM−PK−K5881d) with abundant longitudinally oriented primary and secondary osteons scattered throughout the cortex (arrows). Arrowhead indicates the double LAG near the periphery. MC refers to medullary cavity. Scale bars 125 µm.
Fig. 5 in Growth and life habits of the Triassic cynodont Trirachodon, inferred from bone histology
Fig. 5. The bone histology of a Trirachodon radius and ulna, from a single individual (CGP1/79). A. Radius (CGP1/79a), note the annuli containing parallel−fibered tissue and the LAG at the periphery of the bone (arrowhead). Vascularization decreases towards the periphery. Remodeling has occurred as is evident from the resorption cavities in the peri−medullary cavity. Scale bar 250 µm. B. Ulna (CGP1/79b), the tissue consists of moderately vascularized fibro−lamellar tissue, which is interrupted by annuli (arrowheads). Secondary osteons are scattered throughout the cortex (white arrow). MC indicates medullary cavity. Scale bar 125 µm.
Fig. 2 in Growth and life habits of the Triassic cynodont Trirachodon, inferred from bone histology
Fig. 2. Transverse sections of Trirachodon femora. A. Femur (NMQ− R3282a), estimated to be 51% adult size; A1, highly vascularized fibrolamellar bone, scale bar 250 µm; A2, high magnification of the same, showing two indistinct annuli (arrowheads), scale bar 125 µm. B. Femur (SAM−PK−5881a) consisting of moderately vascularized fibro−lamellar bone with a parallel−fibred region at the periphery (arrowhead). The vascular canals are radially and longitudinally orientated, with some anastomoses. Arrow indicates a secondary osteon, scale bar 250 µm. MC indicates medullary cavity.
Evaluation of Horizontal Mandibular Ridge Augmentation Through Subperiosteal Tunneling by Using Bovine Sticky Bone (Radio-Histological Study)
ClinicalTrials.gov study NCT07353086. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Bone histological correlates for air sacs and their implications for understanding the origin of the dinosaurian respiratory system
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Data from: Bone histology of Azendohsaurus laaroussii. Implications for the evolution of thermometabolism in Archosauromorpha
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