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355 results for “conodont”
FIGURE 4 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 4. Agnostoid and trilobite species range chart, Windfall Formation, Ninemile Canyon, Nevada.
FIGURE 3. X in Evolutionary convergence in conodonts revealed by Synchrotron-based Tomographic Microscopy
FIGURE 3. X-ray synchrotron microtomographic sections compared to SEM photos of artificially fractured conodont specimens. 1, Tomographic section of Epigondolella quadrata specimen A; 2-4, SEM photos of an artificially fractured specimen of Carnepigondolella carpathica (sample NA16). Both the specimens are sectioned in correspondence to the cusp; 5-6, Comparison between a tomographic section (5) and an artificially fractured (6) specimen of E. uniformis from the same sample (NA42). Legend: cu, cusp; wm, white matter; hp, hypocalcification; gl, growth lines.
FIGURE 2. X in Evolutionary convergence in conodonts revealed by Synchrotron-based Tomographic Microscopy
FIGURE 2. X-ray Synchrotron microtomography of Epigondolella quadrata specimen A. Three possible sections that can be obtained with the X-ray synchrotron microscopy are shown. 1, 3D model of the specimen: 2, Longitudinal section; 3, Horizontal section; 4, Cross section. Scale bar equals 200 µm.
Figure 20. A–E in Middle to Late Ordovician (Darriwilian-Sandbian) Conodonts from the Dawangou Section, Kalpin Area of the Tarim Basin, Northwestern China
Figure 20. A–E, Protopanderodus cooperi (Sweet & Bergström, 1962), from the Pratt Ferry Formation of Alabama. A–C, M element, OSU 52802, from the topotype locality, A–B, posterior views (IY170-024, IY170-025), C, anterior view (IY171-011). D–E, Sb element, OSU 52803, from the topotype locality, D, outer lateral view (IY171-012), E, inner lateral view (IY170-023). F–L, Protopanderodus varicostatus (Sweet & Bergström, 1962); from the Pratt Ferry Formation of Alabama. F–H, M2 element, OSU 52804, topotype, sample 64B2-12 from the top bed of the formation, F–G, posterior views (IY170-002, Iy170-001), F, anterior view (IY171-015); I–J, M2 element, OSU 52805 from the topotype locality, I, posterior view (IY170-007), J, anterior view (IY171-018). K–L, M1 element, OSU 52806, topotype, sample 64B2-12 from the top bed of the formation, K, posterior view (170-026), L, anterior view (IY171-013). Scale bars 100 µm.
FIG. 10 in Conodonts in the Silurian of Severnaya Zemlya and Sedov archipelagos (Russia), with special reference to the genus Ozarkodina Branson & Mehl, 1933
FIG. 10. — Ozarkodina waugoolaensis Bischoff, 1986; A, C, Cn 6064, lower and lateral views of Pa element; B, Cn 6035, lateral view of Pb element; D, Cn 6079, lateral view of Sc element; E, I, L, Cn 6067, lateral and lower views of Pa element (L in translucent light); F, Cn 6041, lateral view of M element; G, Cn 6078, lateral view of M element; H, Cn 6042, lateral view of Sc element; J, Cn 6043, posterior view of Sb element; K, M, N, Cn 6066, lateral and lower views of Pa element (N in translucent light); A, (C), from the lower part of the Golomyannyj Formation, October Revolution Island, Strojnaya River, section 52, sample MF 52-23; B, from the lowermost part of the Srednij Formation, Srednij Island, section 1(79), sample MF 2-13; D, G, from the upper part of the Srednij Formation, October Revolution Island, Ushakov River, section 32, sample MF 46-19; F, H, J, from the lowermost part of the Srednij Formation, Srednij Island, section 1(79), sample MF 2-10; K, (M, N); E, (I-L), from the upper part of the Vodopad Formation, October Revolution Island, Ushakov River, section 32, sample MF 46-14. Scale bar: 0.5 mm.
FIG. 6 in Conodonts in the Silurian of Severnaya Zemlya and Sedov archipelagos (Russia), with special reference to the genus Ozarkodina Branson & Mehl, 1933
FIG. 6. — Conodont-based correlation of the Silurian sequence on Severnaya Zemlya with the international Silurian standard epochs and stages.
Data from: Chemical element distributions within conodont elements and their functional implications
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Data from: The interrelationships of ‘complex’ conodonts (Vertebrata)
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Data from: Cladograms, phylogenies and the veracity of the conodont fossil record
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Data from: Testing hypotheses of element loss and instability in the apparatus composition of complex conodonts: articulated skeletons of Hindeodus
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Data from: Reconstruction of the multielement apparatus of the earliest Triassic conodont, Hindeodus parvus, using synchrotron radiation X-ray micro-tomography
Earliest Triassic natural conodont assemblages preserved as impressions on bedding planes occur in a claystone of the Hashikadani Formation, which is part of the Mino Terrane, a Jurassic accretionary complex in Japan. In this study, the apparatus of Hindeodus parvus is reconstructed using synchrotron radiation micro-tomography (SR–μCT). This species has six kinds of elements disposed in 15 positions forming the conodont apparatus. Carminiscaphate, angulate, and makellate forms are settled in pairs in the P1, P2, and M positions, respectively. The single alate element is correlated with the S0 position. The S array is a cluster of eight ramiforms, subdivided into two inner pairs of digyrate S1–2 and two outer pairs of bipennate S3–4 elements. The reconstruction is similar to a well-known ozarkodinid apparatus model. In addition, the μCT images show that the 'anterior' and 'posterior' processes of the S1–2 elements faced the caudal and rostral ends of the living conodont body, respectively.
Morphological trends across the Norian/Rhaetian boundary within Late Triassic conodonts in western Canada: Implications for protracted paleoenvironmental disturbance preceding the end-Triassic mass extinction
<p>Appendix for "Morphological trends across the Norian/Rhaetian boundary within Late Triassic conodonts in western Canada: Implications for protracted paleoenvironmental disturbance preceding the end-Triassic mass extinction".</p>
Data from: Reconstruction of the multielement apparatus of the earliest Triassic conodont, Hindeodus parvus, using synchrotron radiation X-ray micro-tomography
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PLATE 8 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 8. Cephala of Lotagnostus nolani n. sp. and Lotagnostus aff. L. nolani. Each white scale bar represents 2mm. 1-17. Lotagnostus nolani n. sp. 1-4. Holotype, CM 41360, from 5/22/08B, dorsal; anterior, left lateral, and anterior oblique views. 5. CM 41361, from 5/22/08B, dorsal view. 6. CM 41362, from 5/22/08B, dorsal view. 7-9. USMN 775724, from D3362-CO, anterior, right lateral, and dorsal views. 10. CM 41301, from 5/22/08B, dorsal view. 11. CM 41302, from 5/22/08B, dorsal view. 12-14. CM 41363, from 5/22/08B, dorsal, anterior, and right lateral views. 15. CM 41364, from 5/22/08B, dorsal view. 16. CM 41365, from 5/22/08B, dorsal view. 17. USMN 775725, from D3362-CO, dorsal view. 18-19. Lotagnostus aff. L. nolani. USMN 775726, from D3381-CO, dorsal and anterior oblique views.
Raw geochemical data and additional images of: New insights on micro–scale variations of geochemical and oxygen isotope compositions in conodont and shark tooth bioapatite
<p>The files contain the Research Data for the article entitled <strong>'New insights on micro–scale variations of geochemical and oxygen isotope compositions in conodont and shark tooth bioapatite'</strong>. It includes raw geochemical data (stable isotope analysis and elemental analysis) with its respective normalizations, images (scanning electron microscopy) and results from additional samples. Statistical tests are also encompassed. Also, profilometer figures that show samples’ topography are available (please consult the README file). Any doubt or question about these are welcomed by me (Zoneibe Luz) and Torsten Vennemann for discussion or further considerations.</p>
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Allen Brain Atlas
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