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9 results for “Rhopalodiales”
Supporting voucher images for Phylogeny, ecology, morphological evolution, and reclassification of the diatom orders Surirellales and Rhopalodiales
<p>A compressed directory of images of voucher specimens used for sequencing and phylogenetic analysis.</p>
Data alignment and phylogenetic trees from Phylogeny, ecology, morphological evolution, and reclassification of the diatom orders Surirellales and Rhopalodiales
<p>Alignment and tree files from Ruck et al. 2016:</p> <p>Phylogeny, ecology, morphological evolution, and reclassification of the diatom orders Surirellales and Rhopalodiales</p>
FIGURES 35–40 in A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia
FIGURES 35–40. Epithemia agharkarii sp. nov., SEM from the type material (AHMA #1405), external and internal views. 35, 36. Dorsal frustule showing a regularly sculptured outer surface (Fig. 35, arrows) of the valve with C-type foramina, single row of poroids on the valvocopula and cingulum elements (Fig. 35, asterisks). 37. Ventral view of valve internal with primary (arrows) and secondary fibular costae (arrows), alveolus. 38. Internal view showing the siliceous extensions of the ribs indicated by asterisks. 39. Magnified view of primary fibular costae inside with secondary fibular costae, alveolus (asterisks), C-shaped foramina (arrows), silica processes, and irregularly shaped portula with internal raphe (arrowheads) inside the canal. 40. Broken valve showing the raphe canal (arrows), portula (arrowheads) and stright distal raphe ending. Scale bar = 10 μm (Fig. 35), 2 μm (Fig. 36), 4 μm (Figs 37, 38, 40), 1 μm (Fig. 39).
FIGURES 1–28 in A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia
FIGURES 1–28. Epithemia agharkarii sp. nov., LM (DIC) from the type material (AHMA #1405). 1–28. Valves, focused on the ventral part of the valve face, showing the valve variability of the population. 4–5. Same valve showing fibular costae. 21–26. Frustule focused on the ventral girdle view of the frustule variability of the holotype population. Fig. 20 represents the holotype. Figs 3, 20, and 28. In LM view, arrows showing the raphe, extending from near the ventral margin at the apices to nearly the dorsal margin in the center. 24. In LM view, arrows indicating the terminal thickenings of the transapical costae. Scale bar = 10 μm, Figs 1–20 (Fig. 8) & 21–28 (Fig. 21).
FIGURE 20, 21 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)
FIGURE 20, 21. Tetralunata schoemanii, sp. nov. Septum, cross section. Fig. 20. Septum only. Fig. 21. Valve with costa and septum overlaying the valve. Scale bars = 5 µm.
FIGURES 16–19 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)
FIGURES 16–19. Tetralunata schoemanii, sp. nov. Scanning electron microscopy. Internal views. Fig. 16. Valve view with costae evident. Scale bar = 10 µm. Fig. 17. Valve with septum overlaying valve. Scale bar = 5 µm. Fig. 18. Septum. Scale bar = 5 µm. Fig. 19. High magnification view of the center of the valve showing proximal raphe ends. Scale bar = 1 µm.
FIGURES 1–10 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)
FIGURES 1–10. Tetralunata schoemanii, sp. nov. Light Microscopy. Figs 1–8. Size diminution series, valve views, from Holotype slide. Fig. 9. Septa. Fig. 10. Frustule in girdle view showing Häutung valve. Scale bar = 10 µm for all specimens.
FIGURES 11–15 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)
FIGURES 11–15. Tetralunata schoemanii, sp. nov. Scanning electron microscopy. Valve exterior. Figures 11, 12. Valve view of entire cell. Scale bars = 5 µm. Figs 13, 14. Higher magnification view of volae occluding areolae, on valve face and mantle, respectively. Scale bars = 1.5 µm. Fig. 15. Girdle view showing the girdle bands near the valve apex. Scale bar = 2.5 µm.
FIGURES 29–34 in A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia
FIGURES 29–34. Epithemia agharkarii sp. nov., SEM from the type material (AHMA #1405), external views. 29. External view of the ventral frustule, raphe (arrows) and the girdle bands. 30. Valves are showing the proximal end of the raphe with a small circular opening (arrows) and arrowheads showing the absence of keel. 31. The distal raphe end deflected dorsally (arrow) and arrowheads showing the absence of keel. 32. A broken frustule is showing the striation of the external valve, and a single row of poroids (arrows) on the valvocopula. 33, 34. Valves are showing the C-type areolae foramina (arrows). Scale bar = 2 μm (Figs 29, 32), 1 μm (Figs 30–31, 33), 0.5 μm (Fig. 34).
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