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47 results for “Sellaphora”
FIGURES 29–34 in Sellaphora jiuzhaienis sp. nov. (Bacillariophyceae)-A new diatom species from Jiuzhaigou National Nature Reserve, China
FIGURES 29–34. Sellaphora jiuzhaienis sp. nov. Scanning electron microscopy (SEM). Figs 29–31. External view of entire valve. Figs 32, 33. External view of half of the valve. White arrow indicates narrow grooves surrounding the conopeum. Fig. 34. Detailed external view of the valve centre (white arrow indicates narrow grooves surrounding the conopeum). Scale bar = 5 μm (29–31), 2 μm (32–34).
FIGURES 17–29. Sellaphora pseudoventralis comb. nov. 17–27. Light microscopy. 29–29. SEM. 28. External valve view. 29 in Sellaphora smirnovii (Bacillariophyta, Sellaphoraceae), a new small-celled species from Lake Glubokoe, European Russia, together with transfer of Navicula pseudoventralis to the genus Sellaphora
FIGURES 17–29. Sellaphora pseudoventralis comb. nov. 17–27. Light microscopy. 29–29. SEM. 28. External valve view. 29. Internal valve view. Scale bars: 10 μm (Figs 17–27), 2 μm (Figs 28–29).
FIGURES 1–16 in Sellaphora smirnovii (Bacillariophyta, Sellaphoraceae), a new small-celled species from Lake Glubokoe, European Russia, together with transfer of Navicula pseudoventralis to the genus Sellaphora
FIGURES 1–16. Sellaphora smirnovii sp. nov. 1–13. Light microscopy, Fig. 7 illustrates the holotype specimen. 14–16. SEM, external valve view. Scale bars: 10 μm (Figs 1–13), 1 μm (Figs 14–16).
FIGURES 2–17 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURES 2–17. Sellaphora davoutiana (type material from Lispach Lake at La Bresse). Figs 2–13. LM valve views. Holotype depicted on Fig. 5. Scale bar = 10 μm. Figs 14–17. SEM views. 14. Valve in external view. 15. Valve in internal view. 16. Close up on apex showing distal raphe fissure ending in helictoglossae. 17. Valve in external view showing distal raphe ending on the mantle. Scale bars = 2 μm.
FIGURE 1 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURE 1. Sampling sites (black triangle) in Grand Est region (France) where Sellaphora davoutiana has been recorded, with the location of type locality (black star).
FIGURES 18–33 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURES 18–33. Adlafia detenta comb. nov. (Hustedt Collection, Lectotype E1330, Davos, Schweiz 230, Unterer Grialetschsee, Grund, 2.10.1932). Figs 18–30. LM views. Original drawing from Hustedt in Schmidt et al. (1934, pl. 400, figs 93–95) here reproduced as Figs 18–20. Scale bar = 10 μm. Figs 31–33. SEM views. 31–32. Valve in external view. 33. Close up on apex showing distal raphe fissure ending. Note the typical stria divergence of the genus Adlafia (arrow). Scale bars = 2 μm.
FIGURES 3–51. Sellaphora gologonica G.G in Sellaphora gologonica sp. nov. (Bacillariophyta, Sellaphoraceae), a new diatom species from a Mediterranean karst spring (Sardinia, Italy)
FIGURES 3–51. Sellaphora gologonica G.G. Lai, Ector & C.E. Wetzel sp. nov. Population "Su Gologone" spring. LM (Figs 3–46): size reduction series of the population. Specimen here depicted in Figs 6–7. Frustules rectangular in girdle view (Fig. 31). SEM (Figs 47–51): Figs 47–50. External views showing striae patterns (strongly radiate) and double areolae near the axial area on the valve surface. Arrows–sinuous raphe system. Fig. 51. Internal view showing slightly deflected raphe endings. Arrows–large rounded apical pits present at both apices. LM scale bar = 10 μm.
FIGURES 52–59 in Sellaphora gologonica sp. nov. (Bacillariophyta, Sellaphoraceae), a new diatom species from a Mediterranean karst spring (Sardinia, Italy)
FIGURES 52–59. SEM comparison between Sellaphora gologonica sp. nov. from Su Gologone spring (Sardinia) and Sellaphora seminulum from Grunow's original material. Figs 52–55. External views of S. gologonica sp. nov. Figs 56–58. External views of S. seminulum. Fig. 59. Internal view of S. seminulum. Arrows–apical pits present at apices.
FIGURE 2 in Sellaphora gologonica sp. nov. (Bacillariophyta, Sellaphoraceae), a new diatom species from a Mediterranean karst spring (Sardinia, Italy)
FIGURE 2. Sa Vena spring: water emergency point (a), brook (b), water abstraction system inside the rock (c).
FIGURE 23 in Sellaphora balashovae (Bacillariophyta), a new species from Siberian mountain Lake Frolikha (Baikal region), Russia
FIGURE 23. Phylogenetic analysis constructed from an alignment with 49 sequences and 1712 characters (partial rbcL gene and partial SSU rDNA gene). Values above horizontal lines are Bayesian posterior probabilities (<70 are not shown), values below horizontal lines are bootstrap support as maximum likelihood analyses (<50 are not shown). Three species Stephanodiscus hantzschii, S. minutulus and Skeletonema menzelii were chosen as outgroup.
FIGURES 18–22 in Sellaphora balashovae (Bacillariophyta), a new species from Siberian mountain Lake Frolikha (Baikal region), Russia
FIGURES 18–22. Sellaphora balashovae sp. nov. Figs 18–20: Internal valve view note small helictoglossae, uniseriate striae. Fig. 21. Internal view of valve central part, note bowtie central area. Fig. 22. Internal view of valve end, note helictoglossa and raphe slit.
FIGURES 1–17 in Sellaphora balashovae (Bacillariophyta), a new species from Siberian mountain Lake Frolikha (Baikal region), Russia
FIGURES 1–17. Sellaphora balashovae sp. nov. Fig. 1: Live cell with chloroplast structure. Figs 2–14: Valve view. Fig. 2: Valve from samples collected in the Lake Frolikha. Figs 15–16: External valve views, note an axial area represented by sternum. Fig. 17: External view of valve central part. (1–14: LM; 15–17: SEM). Scale bar for LM: 10 μm.
FIGURES 10–13 in Morphology and ultrastructure of Sellaphora constrictum sp. nov. (Bacillariophyta), a new diatom from southern China
FIGURES 10–13. Sellaphora constrictum sp. nov. SEM, external views. Fig. 10. Valve view of entire valve, showing constriction in the middle of the margins, undulation of raphe, two types of areolae (arrow I and arrow II), conopeum (arrow A), the trough borders the conopeum (arrow B) and the ridge borders the trough (arrow C). Fig. 11. Valve view of entire valve, showing the ridge near the valve margin (arrow A) and the ridge along the border of the valve face and the mantle (arrow B), the mantle (arrow C) and the girdle (arrow D). Fig. 12. Central part of the valve, showing dilated proximal raphe ends, two types of areolae, the trough borders the conopeum (arrow A), the ridge borders the trough (arrow B) and expanded conopeum (arrow C). Fig. 13. Valve apex, showing distal raphe end curved on the mantle and arrangement of striae at apices. Scale bar =2 μm.
FIGURES 1–9 in Morphology and ultrastructure of Sellaphora constrictum sp. nov. (Bacillariophyta), a new diatom from southern China
FIGURES 1–9. Sellaphora constrictum sp. nov., light microscopy. Valve view, size diminution series. Figure 1 is of the Holotype. Fig. 1– 3, 5–9 are from samples of Maolan Nature Reserve, Fig. 4 is from sample of Wuzhishan Mountain. Arrow in Fig. 5 shows the longitudinal ridge borders the trough. Scale bar =10 μm.
FIGURES 14–17 in Morphology and ultrastructure of Sellaphora constrictum sp. nov. (Bacillariophyta), a new diatom from southern China
FIGURES 14–17. Sellaphora constrictum sp. nov. SEM, internal views. Fig. 14. Valve view of entire valve, showing straight raphe and arrangement of striae. Fig. 15. Central part of the valve, showing asymmetric proximal raphe ends deflected in the same direction and arrangement of striae. Note there is only a single type of areolae evident internally. Fig. 16. Valve apex, showing larger foramen-like (pit) that does not penetrate to the exterior. Fig. 17. Valve apex, showing the long helicotoglossa. Scale bar =2 μm.
FIGURE 2–11 in Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia
FIGURE 2–11. Sellaphora mayrii sp. nov. Type material LPC 15860. Laguna Gemelas Este, Santa Cruz province, Argentina. LM images. Fig. 7 Illustrates the holotype specimen. FIGURE 12–14. Sellaphora smirnovii Chudaev & Gololobova, type material. Lake Glubokoe, Russia.
FIGURE 29 in Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia
FIGURE 29. Plot, comparing the length and width of Sellaphora mayrii sp. nov. and Sellaphora smirnovii.
FIGURE 21–28 in Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia
FIGURE 21–28. Sellaphora mayrii sp. nov. Type material LPC 15860. Laguna Gemelas Este, Santa Cruz province, Argentina. SEM images. FIGURE 21. Tilted external valve view. Notice the marginal ridge (arrow). FIGURE 22–23. Detail of the external apices view. FIGURE 24. Internal apex view. Notice the larger foramen-like (pit) (arrow). FIGURE 25. Detail of the external view of proximal raphe endings (drop-shaped). FIGURE 26. Detail of the internal view of the proximal raphe endings (straight). FIGURE 27–28. Close up of the internal view of the areolae, notice the dome-shaped hymens in Fig. 28.
FIGURE 15–20 in Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia
FIGURE 15–20. Sellaphora mayrii sp. nov. Type material LPC 15860. Laguna Gemelas Este, Santa Cruz province, Argentina. SEM images. FIGURE 15–17. External valve view. Notice the sharp edge of the longitudinal groove (arrow) and the marginal ridge (arrowhead) in Fig. 15. Fig. 16 presents white deposits of probable mineral origin on the valve face. FIGURE 18–20. Internal valve view. In Fig. 19, notice the dome-shaped hymenes internally occluding the areolae (arrow).
FIGURES 24–26 in Sellaphora tanghongquii sp. nov. (Bacillariophyta, Sellaphoraceae), a new diatom species from the Southern China
FIGURES 24–26. Sellaphora tanghongquii sp. nov., SEM, internal views. 24. Internal view of entire valve. 25. Detail of valve apex, showing pore-like pit and elongated helictoglossae. 26. Detail of the valve central area, showing biseriate striae and central raphe ends bending in the same direction. Scale bar = 2 μm (Figs 24, 26), 1 μm (Fig. 25).
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