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56 results for “Surirella”
Fig. 3 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 3. Surirella ebalensis sp. nov., type material from sample CCA 2070, Lomami River, DR Congo, SEM. External view. A–B. Detail of the girdle showing a part of a girdle with ligula (arrow) and the neighbouring interrupted band. C. Detail of the valve mantle with the draped silica spines (arrow) and the silica plaques (arrow) near the edge of the mantle and the valvocopula. D. Detail of the girdle band near the pole. Scale bars = 2 µm.
Fig. 1 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 1. Surirella ebalensis sp. nov., from the holotype slide BR 4398, Lomami River, DR Congo, LM (DIC). A–C. Valve representing the holotype, different foci of the same valve. D–E. Different foci of the same valve. F. Girdle view. Scale bar = 10 µm.
Fig. 9 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 9. Surirella congolensis sp. nov., type material from sample CCA 2071, Lomami River, DR Congo, SEM. Internal view. A–B. Head pole showing the continuous raphe (arrow). C–D. Foot pole showing the interruption of the raphe and the straight slightly expanded terminal raphe endings. E–F. Detail of the alar canals. Scale bars: B–C = 2 µm; A, D = 1 µm.
Fig. 8 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 8. Surirella congolensis sp. nov., type material from sample CCA 2071, Lomami River, DR Congo, SEM. External view. A. Overview. B–C. Detail of foot pole showing the straight not expanded raphe endings (arrow). D. Detail of the apical pole showing the slightly curved raphe endings (arrow). E–F. Detail of the biseriate striae and the open fenestrae with the fenestral bars. Scale bars: A–B = 2 µm; C–F = 1 µm.
Fig. 2 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 2. Surirella ebalensis sp. nov., type material from sample CCA 2070, Lomami River, DR Congo, SEM. External view. B, C, F = detail of the raphe keel with blunt spines orientated towards the valve face and which are draped over a large part of the indented mantle side. A. Overview. B–C. Detail of the valve ornamented with silica granules and blunt spines. D. Detail of the apical pole, showing the curved raphe endings. E–F. Detail of the foot pole showing the straight raphe endings. F. Short spherical shaped silica elements near the pole (arrow). Scale bars: A = 10 µm; B = 4 µm; C, F = 2 µm; D–E = 1 µm.
Fig. 4 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 4. Surirella ebalensis sp. nov., type material from sample CCA 2070, Lomami River, DR Congo, SEM. External view. Details of the various types of spines on the valve face and the keel. A–B. Detail of the valve surface with the biseriate striae (arrow) becoming sometimes uniseriate near the axial area. C–D. Section of the valve face showing the simple perforation of the silica wall at the areolae. Scale bars: A–B = 2 µm; C–D = 1 µm.
Fig. 5 in New and interesting Surirella taxa (Surirellaceae, Bacillariophyta) from the Congo Basin (DR Congo)
Fig. 5. Surirella ebalensis sp. nov., type material from sample CCA 2070, Lomami River, DR Congo, SEM. Internal view. A. Detail of the multiseriate striae, and the perforation of the elongated granules without rimmed margin (arrow). B, D. Detail of the continuous raphe near the apical pole with a reduced helictoglossa (arrow). C. Detail of the straight not expanded raphe endings at the foot pole and their reduced helictoglossae (arrows). Scale bars: B = 2 µm; A, C–D = 1 µm.
Figure 1 in Why Surirella amphioxys is not an Iconella (Bacillariophyceae)
Figure 1. Taxonomist's desktop. A. Krammer & Lange-Bertalot (1988): Surirella amphioxys W.Sm. "2, 4–8= original material". B. Lange-Bertalot & Krammer (1987): Surirella brebissonii var. punctata Krammer, original material.
FIGURES 26–31. Surirella tayronarum spec. nov. SEM. 26–29 in Surirella tayronarum spec. nov. (Surirellaceae, Bacillariophyta) from Colombia
FIGURES 26–31. Surirella tayronarum spec. nov. SEM. 26–29. Valves in internal view. 26. View of the whole valve. Note the sunken axial line and the bulky end. 27. Detail of the valve end showing portulae and striae with tiny areolae. 28. Detail showing the tiny areola arranged in sinuous lines. 29. Detail of portulae, note the internal raphe fissure. 30–31. Frustule in girdle view. 30. View of the whole frustule. 31. Detail showing the unornamented open girdle bands. Scale bars: Fig. 26: 20 μm, Fig. 30: 10 μm, Figs 27–31: 3 μm, Figs 28–29: 1 μm.
FIGURES 18–25. Surirella tayronarum spec. nov. SEM. 18–23 in Surirella tayronarum spec. nov. (Surirellaceae, Bacillariophyta) from Colombia
FIGURES 18–25. Surirella tayronarum spec. nov. SEM. 18–23. Valves in external view. 18. View of the whole valve, note the elevated median ridge and the sunken end. 19. Detail of the valve end showing median ridge, fenestrae and tendrils. 20. Valve end showing median ridge, raphe canal and granules. 21. Detail of the wing, showing the fenestrae and tendrils. 22. Detail of the valve face. Note smooth raphe canal, fenestrae, tendrils and granules. 23. Detail of the granules. 24. Detail of the mantle, note the line of slits and silica plaques. 25. Valve in girdle view, detail of the pole showing the expanded raphe end. Scale bars: Fig. 18: 20 μm, Figs 19–20: 10 μm, Figs 21–22, 24–25: 2 μm, Fig. 23: 1 μm.
FIGURES 1–17 in Surirella tayronarum spec. nov. (Surirellaceae, Bacillariophyta) from Colombia
FIGURES 1–17. Surirella tayronarum spec. nov. LM. Specimens of the type population. 1–2. Frustule in girdle view. Note the open of valvocopula (arrow). 3–15. Valve views showing shape and size variation. 16. Detail of valve showing striae, granules and tendrils (arrowheads). 17. Detail showing the sunken end. 12–13. Holotype. Scale bars: Figs 1–15: 20 μm, Figs 16–17: 10 μm.
FIGURES 288–297. Figs. 288–291. Surirella fastuosa var. cuneata. Figs. 292–294. S. fastuosa. Fig. 295. S. fluminensis. Figs. 296–297 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 288–297. Figs. 288–291. Surirella fastuosa var. cuneata. Figs. 292–294. S. fastuosa. Fig. 295. S. fluminensis. Figs. 296–297. Coronia samoensis. Scale bar = 10 μm.
FIGURES 71–80. Figs. 71–73. Delphineis surirella. Fig. 71 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 71–80. Figs. 71–73. Delphineis surirella. Fig. 71. LM valve view. Figs. 72–73. SEM valve view. Figs. 74–78. D. minutissima. Figs. 74–76. SEM valve view. Fig. 77. LM valve view. Fig. 78. SEM frustule in girdle view. Fig. 79. Microtabella interrupta, SEM frustule in girdle view. Fig. 80. Pseudostaurosira sp.? SEM valve view. Scale bar: figs. 73–78, 80 = 1 μm, figs. 71, 72, 79 = 10 μm.
FIGURE 8 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 8. SEM Thalassiosira gassaea. Scanning electron micrographs of Thalassiosira gassaea. The exterior of the valve (A) is marked by sparse marginal fultoportulae and a single large rimoportula (arrowed). The interior of the valve exhibits a simple rimoportula with raised lips near the middle of the aperture and reduced near the outside ends of the aperture (D). The fultoportulae are slightly raised with four satellite pores, the areolae are marked with elliptical velum that are slightly depressed into interior valve surface. Internal views of the valve (B & C) show overall valve structure, rimoportula is closely associated with one fultoportula (B & D).
FIGURE 5 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 5. LM Thalassiosira feibelii. Size diminution series of Thalassiosira feibelii Images taken at x1000. Scale bar is 5 μm. B is the holotype.
FIGURE 7 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 7. LM Thalassiosira gassaea. Size diminution series of Thalassiosira gassaea. Images taken at x1000. Scale bar is 2 μm. A is the holotype.
FIGURE 4 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 4. SEM Surirella lorenyangensis. Scanning electron micrographs of Surirella lorenyangensis. A nearly complete frustule (A) with both valves and an attached yet broken girdle band (arrowed). Internal structures are smooth (B) exhibiting hollow fibulae. The internal structure of the fibulae are marked by a lattice structure arrowed in (C). The footpole is rostrate (D), while the headpole is more rounded (E). The ala is downturned towards the girdle at both poles (D & E). The raphe is more towards the exterior sides of the ala in the middle of the valve (C & F) and moves to the top of the ala at the poles (D & E). The raphe is contained within a raised channel along the alar wings (F), ala are supported by the fibulae with unobstructed windows between fibulae (F & G). The exterior valve surface is covered in granules arranged weakly in rows, indicated by arrow in (E), also shown in (A & G).
FIGURE 6 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 6. SEM Thalassiosira feibelii. Scanning electron micrographs of Thalassiosira feibelii. A complete frustule with intact girdle band (A) note the single ring of marginal fultoportulae. The exterior expression of the fultoportulae are marked by granules (B & D). An internal view of T feibelii (E) with exposed areolae in the lower-left portion. Internally, fultoportulae are raised with four satellite pores (F). Internally a simple rimoportula is located in line with the row fultoportulae and is expressed with slightly raised lips and aperture, arrowed in (C). Areolae are loculate, arrowed in (F), velum lies flat with the interior valve wall and foramen is on the exterior wall (G & F).
FIGURE 3 in Three novel species of Bacillariophyta (Diatoms) in the genera Surirella and Thalassiosira from Pleistocene Paleolake Lorenyang (~2 - 1.6 Ma) Turkana Basin, Kenya
FIGURE 3. LM Surirella lorenyangensis. Size diminution series of Surirella lorenyangensis Images taken at x400. Scale bar is 30 μm. C is the holotype.
FIGURES 38–42 in Surirella subrotunda sp. nov. and Surirella parahelvetica sp. nov., two new diatom (Bacillariophyta) species from Lake Prespa, Macedonia
FIGURES 38–42: Surirella parahelvetica (SEM). Figs 38, 41. External views. Fig. 41. Short conic spines along inner side of keel (white arrow), spines on alar canals (black arrow). Keel with silica ridges following raphe and a random pattern of silica thickening on the keel. Figs 39, 40, 42. Internal views. Fig. 42. terminal raphe fissures with simple pores, not deflected and areolae with ringed domes. Scale bars in Figs 38–40 = 10 µm; Fig. 41 = 5 µm; Fig. 42 = 2 µm.
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