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PLATE 2. Eunotia yunnanica Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)
PLATE 2. Eunotia yunnanica Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 12–17. Scanning electron microscope images. Figures 12– 14, external views. Fig. 12. Whole valve showing thickened ridges between striae. Fig. 13. View of mid-valve showing striae multiseriate at the dorsal margin and onto the mantle, but uniseriate across the valve face. Fig. 14. Valve apex showing striae uniseriate on valve face and mantle. Distal raphe end curves ca. 1/3 of the way from the ventral margin towards the dorsal margin. Figs 15–17, internal views. Fig. 15. Whole valve view with pseudosepta present at apices. Fig. 16. Dorsal margin with striae multiseriate, becoming uniseriate across the valve face. Fig. 17. Valve apex showing pseudoseptum and helictoglossa.
PLATE 1. Eunotia yunnanica Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)
PLATE 1. Eunotia yunnanica Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 1–11. Light microscope images showing size diminution series. Holotype population. Scale bar = 10 µm.
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 17–22. Navicula gongii. SEM, external views. 17. Entire valve view. 18 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 17–22. Navicula gongii. SEM, external views. 17. Entire valve view. 18. Central portion of the valve with droplike shaped and lineolae are connected with narrow, shallow lines on the interstriae. 19. View of the end showing distal raphe end deflected onto the valve mantle. 20–22. Navicula gongii. SEM, internal views. 20. Internal valve view with central nodule, raphe slit and helictoglossae. 21. Central nodule with scarcely expanded and inclined to the secondary valve side and a rhombical central area. 22. Helictoglossa slightly offset from raphe terminates.
FIGURES 27–32. Navicula yunnanensis SEM, external views. 27. Entire external valve view. 28 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 27–32. Navicula yunnanensis SEM, external views. 27. Entire external valve view. 28. Central portion of the valve with straight, not elongated, without silicate-tongue and hardly deflected at any direction. 29. View of the end with a slightly curve to the primary side. 30–32. Navicula yunnanensis SEM, internal views. 30. Entire internal valve view. 31. Central nodule with scarcely expanded and a small rounded central area. 32. Helictoglossa slightly offset from raphe terminates.
FIGURES 23–26. Navicula yunnanensis Light microscopy, valve views showing reduction. Fig. 24 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 23–26. Navicula yunnanensis Light microscopy, valve views showing reduction. Fig. 24 is of the holotype.
FIGURES 12–16. Navicula gongii. Light microscopy, valve views showing reduction. Fig. 12 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 12–16. Navicula gongii. Light microscopy, valve views showing reduction. Fig. 12 is of the holotype.
FIGURES 6–11. Navicula craticuloides. SEM, external views. 6. Entire valve view. 7 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 6–11. Navicula craticuloides. SEM, external views. 6. Entire valve view. 7. Central portion of the valve showing broadly expanded drop-like. 8. View of the end with prolongation of the raphe slit from a terminal pore to the valve mantle with a clear curve to the secondary side. 9–11. Navicula craticuloides. SEM, internal views. 9. Internal valve view. 10. Central portion of the valve with a twisted raphe rib. 11. Uncorroded intact hymens occlude the areolae and helictoglossa slightly offset from raphe terminates.
FIGURES 14–18. Diploneis hoevsgoelensis morphotype 1, SEM internal valve views. Fig. 14 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 14–18. Diploneis hoevsgoelensis morphotype 1, SEM internal valve views. Fig. 14. View of the whole valve. Fig. 15. Central area with simple proximal raphe endings. Fig. 16. Distal raphe endings. Fig. 17. Structure of the single elongate opening of the alveolus. Fig. 18. Alveoli covered with thin layer of perforate silica. Scale bars = 10 μm (Fig. 14); 5 μm (Figs 15, 16); 2 μm (Fig. 17); 1 μm (Fig. 18).
FIGURES 8–13. Diploneis hoevsgoelensis morphotype 1, SEM external valve views. Fig. 8. Whole valve. Fig. 9 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 8–13. Diploneis hoevsgoelensis morphotype 1, SEM external valve views. Fig. 8. Whole valve. Fig. 9. View of the central area with proximal raphe endings; white arrow showing the narrow hyaline area between the longitudinal canal and the striae. Fig. 10. Distal raphe endings with deflected terminal fissures. Fig. 11. The openings of the alveolus, external cribrate and internal perforate silica layer (see white arrow). Fig. 12. Close view of the structure of the depressed cribrate areolae. Fig. 13. External and internal view of the whole frustule. Scale bars = 10 μm (Figs 8, 13); 5 μm (Figs 9, 10); 1 μm (Figs 11, 12).
FIGURES 31–35. Diploneis hoevsgoelensis morphotype 2, SEM internal valve views. Fig. 31 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 31–35. Diploneis hoevsgoelensis morphotype 2, SEM internal valve views. Fig. 31. View of the valve central area. Fig. 32. Distal raphe endings. Fig. 33. Broken valve, showing the structure of the alveolate striae. Fig. 34. Close view of the structure of the single openings of the alveoli. Fig. 35. View of the whole valve. Scale bars = 10 μm (Fig. 35); 5 μm (Figs 31–34).
FIGURES 49–53. Diploneis praeclara, SEM external valve views. Fig. 49 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 49–53. Diploneis praeclara, SEM external valve views. Fig. 49. View of the entire valve. Fig. 50. Close view of the cribrate occlusions. Fig. 51. Distal raphe endings. Fig. 52. One row of areolae of the longitudinal canal at the valve apices. Fig. 53. Central area with proximal raphe endings. Scale bars = 10 μm (Fig. 49); 5 μm (Figs 51–53); 2 μm (Fig. 50).
FIGURES 129–134. Diploneis krammeri, SEM external valve views. Fig. 129 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 129–134. Diploneis krammeri, SEM external valve views. Fig. 129. View of the whole valve. Fig. 130. Proximal raphe endings. Fig. 131. View of the whole frustule. Fig. 132. Showing the structure of the striae at the valve mantle. Fig. 133. Detailed view of the valve central area. Fig. 134. Distal raphe endings with short deflected terminal fissures. Scale bars = 5 μm (Figs 129, 131); 2 μm (Figs 130, 132–134).
FIGURES 65–69. Diploneis elliptica, SEM external valve views. Figs 65, 67 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia
FIGURES 65–69. Diploneis elliptica, SEM external valve views. Figs 65, 67. View of the whole valve. Fig. 66. Close view of the cribrate occlusions. Fig. 68. Valve central area with proximal raphe endings. Fig. 69. Distal raphe endings with terminal raphe fissures. Areolae biseriate formation (black arrow on the cribra structure at the valve apices). Scale bars = 10 μm (Figs 65, 67); 2 μm (Figs 66, 68, 69).
FIGURES 268–273. Gomphonema angusticephalum, external views. 268, 271. General valve views. 269, 273 in The diatom genus Gomphonema Ehrenberg in Lake Baikal. II. Revision of taxa from Gomphonema acuminatum and Gomphonema truncatum-capitatum complexes
FIGURES 268–273. Gomphonema angusticephalum, external views. 268, 271. General valve views. 269, 273. Central area with dilated proximal raphe ends and small, round stigma opening evident. 270, 272. Headpole, with distal raphe ends hooked onto valve mantle. Areolae appear C-shaped. Sclae bars = 5 μm in Figs 268, 271; 1 μm in Figs 269, 270, 272, 273.
FIGURES 13–16. Gomphonema bigutianchnensis. SEM, external views. Fig. 13 Entire valve view showing c in One new Gomphonema Ehrenberg (Bacillariophyta) species from a high mountain lake in Yunnan Province, China
FIGURES 13–16. Gomphonema bigutianchnensis. SEM, external views. Fig. 13 Entire valve view showing c-shaped areolae, undulate raphe and round stigma opening. Scale bar = 3 μm. Fig. 14 View of the headpole with distal raphe end curved on the valve mantle and striae continuous around the headpole. Scale bar = 1 μm. Fig. 15 Central portion of the valve showing proximal raphe ends and rounded stigma opening. Scale bar = 1 μm. Fig. 16 Footpole with c-shaped areolae and apical pore field porelli physically separated from areolae and morphologically distinct from the areolae. Scale bar = 1 μm.
FIGURES 31–36 in Valve ultrastructure of Nitzschia shanxiensis nom. nov., stat. nov. and N. tabellaria (Bacillariales, Bacillariophyceae), with comments on their systematic position
FIGURES 31–36. SEM micrographs of Nitzschia tabellaria. 31. External view of the valve, showing the swollen valve with a simple ridged keel. 32. Central area showing the raphe is filiform and without central raphe ending. 33. Valve terminus showing the hooked raphe ends. 34. Internal view of the valve, showing the canal raphe subtended by fibulae. 35. Internal view of valve center showing the fibulae structures. 36. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices.
FIGURES 25–30 in Valve ultrastructure of Nitzschia shanxiensis nom. nov., stat. nov. and N. tabellaria (Bacillariales, Bacillariophyceae), with comments on their systematic position
FIGURES 25–30. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices.
FIGURES 1–24 in Valve ultrastructure of Nitzschia shanxiensis nom. nov., stat. nov. and N. tabellaria (Bacillariales, Bacillariophyceae), with comments on their systematic position
FIGURES 1–24. LM micrographs of Nitzschia shanxiensis and Nitzschia tabellaria. 1–12: Nitzschia shanxiensis. 13–24: Nitzschia tabellaria. Scale bar: 10 μm.
FIGURE 1. Germainiella spp. Light microscopy. Figs 1–7. Germainiella engimatica. Valve views. Figs 8–10 in First Report and New Freshwater Species of Germainiella (Bacillariophyta) from the Maolan Nature Reserve, Guizhou Province, China
FIGURE 1. Germainiella spp. Light microscopy. Figs 1–7. Germainiella engimatica. Valve views. Figs 8–10. Germainiella maolaniana, sp. nov. Valve views. All specimens from the holotype slide. Figs 11–13. Germainiella guizhouiana, sp. nov. Valve views. All specimens from the holotype slide. Scale bars = 10 μm.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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