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727 results for “Bacillariophyceae”
FIGURES 9–11 in Valve Ultrastructure and Description of a new Luticola D.G.Mann (Bacillariophyceae) species from Colorado, USA
FIGURES 9–11. Luticola coloradiana, sp. nov. Scanning electron microscopy. External valve views. Figures 9–11. Valves demonstrate rugose nature of the valve face. Striae appear interrupted longitudinally. Proximal raphe ends are deflected towards the same side; stigma opening is positioned on the opposite side. In figures 10 and 11, the margin of the valves has an elevated ridge. In figure 11 the mantle of the valve has a series of elongated areolae. Scale bars = 5 µm.
FIGURE 179 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURE 179. Scatterplot of the valve length vs valve width showcasing the differences between A. brunii (circles) and A. gibba sp. nov. (squares) as observed in populations of samples that we collected.
FIGURES 158–178. Afrocymbella muellerii, A. kociolekii, A in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 158–178. Afrocymbella muellerii, A. kociolekii, A. rossii, and A. tanganyikae, LM valve views. 158–162. Afrocymbella muellerii, observed in samples from Chituta and Isanga Bays. 163–169. Afrocymbella kociolekii, observed in samples from Kande Beach and Mpulungu, Chituta, Nkhata Bays. 170–174. Afrocymbella rossii, observed in samples from Kande Beach, Nkhata Bay, and Mangochi. 175–177. Afrocymbella tanganyikae, observed in core NPO4-KH1-1K from Lake Tanganyika. Scale bar = 10 μm.
FIGURES 140–143 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure and APF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143).
FIGURES 136–139 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138).
FIGURES 116–135 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm.
FIGURES 84–86 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 84–86. Afrocymbella delphinea sp. nov., SEM internal valve views. 84. View of the whole valve showing raphe structure and areolae without velum. 85. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 86. Close view of distal raphe terminal fissure and APF with knobby jointed ridge of silica. Scale bars = 5 μm (Fig. 84), 2 μm (Figs 85–86).
FIGURES 87–108 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 87–108. Afrocymbella cocquytiana sp. nov., LM valve views. All valves from the type material. Fig. 93. Holotype specimen. Scale bar = 10 μm.
FIGURES 81–83 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 81–83. Afrocymbella delphinea sp. nov., SEM external valve views. 81. View of the whole valve showing raphe structure, and striae continue uninterrupted onto valve mantle. 82. Close view of the mid-valve showing dorsally deflected proximal raphe ends and slightly round to slightly elongated single stigmoid on the dorsal side of slightly elongated central nodule. 83. Detail of valve apex showing the slit-like areolae and APF of round poroids. Scale bars = 10 μm (Fig. 81), 2 μm (Figs 82, 83).
FIGURES 57–59 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 57–59. Afrocymbella nyassae sp. nov., SEM internal valve views. 57. View of the whole valve showing raphe structure and areolae without velum. 58. Detail of mid-valve of a broken valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 59. Close view of valve apices showing APF with knobby jointed ridge of silica (white arrow) and distal raphe fissures slightly raised into small helictoglossae. Scale bars = 5 μm (Figs 57–58), 2 μm (Fig. 59).
FIGURES 60–80 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 60–80. Afrocymbella delphinea sp. nov., LM valve views. 60–63, 65–80. Valves from the type material. Fig. 74. Holotype specimen. Scale bar = 10 μm.
FIGURES 28–31 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 28–31. Afrocymbella symmetrica sp. nov., SEM internal valve views. 28. View of the whole valve. 29. Detail of valve ends showing APF with knobby jointed ridge of silica. 30. Detail of mid-valve showing internal openings of areolae without velum, proximal raphe ends covered by flap-like silica development, and antler-like intermissio stigmoid. 31. Close view of the bisected distal raphe terminal fissures, terminating into small lobed helictoglossa (black arrow). Scale bars = 10 μm (Fig. 28), 2 μm (Figs 29–31).
FIGURES 54–56 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 54–56. Afrocymbella nyassae sp. nov., SEM external valve views. 54. Half-valve showing uniseriate striae and single stigmoid positioned distally from the round, slightly asymmetric central area. 55. View of the whole valve showing raphe structure and striae continuing onto valve mantle. 56. Close view of distal raphe terminal fissure and APF of round poroids. Scale bars = 5 μm (Fig. 54), 2 μm (Fig. 55), 1 μm (Fig. 56).
FIGURES 32–53 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 32–53. Afrocymbella nyassae sp. nov., LM valve views. All valves displayed from the type material (core sample MAL05-1C- 26E2, 17–18 cm, ~135.5 ka). Fig. 39. Holotype specimen. Scale bar = 10 μm.
FIGURES 112–115 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 112–115. Afrocymbella cocquytiana sp. nov., SEM internal valve views. 112. View of the whole valve showing raphe structure and areolae without velum. 113. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 114. Close view of valve apices showing APF with knobby jointed ridge of silica. 115. Distal raphe fissures slightly raised into small helictoglossae. Scale bars = 10 μm (Fig. 112), 2 μm (Figs 113–115).
FIGURE 1 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURE 1. Map of the lakes Tanganyika and Malawi, showing the sampling locations of modern (red circles) and fossil (cores MAL05- 1C and NPO4-KH1-1K; white circles) specimens used in this study.
FIGURES 144–147 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 144–147. Afrocymbella gracilis, LM valve views. Observed in samples from Chituta Bay and Kombe, Lake Tanganyika. Scale bar = 10 μm.
FIGURES 109–111 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 109–111. Afrocymbella cocquytiana sp. nov., SEM external valve views. 109. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 110. Detail of mid-valve showing dorsally deflected proximal raphe ends, small central nodule, and round to slightly elongated stigmoid dorsally positioned. 111. Detail of valve apex showing the striae structure and APF. Scale bars = 10 μm (Fig. 109), 2 μm (Figs 110–111).
FIGURES 2–23 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 2–23. Afrocymbella symmetrica sp. nov., LM valve views. 2–19, 23. Valves from the type material, core NPO4-KH1-1K, Drive 4, 43–44 cm sample (~50 ka). Fig 9. Holotype specimen. 20–22. Valves from modern sample. Scale bar = 10 μm.
FIGURES 24–27 in The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species
FIGURES 24–27. Afrocymbella symmetrica sp. nov., SEM external valve views. 24, 26. View of the whole valve showing raphe structure, striae on valve mantle, APF on footpole, and dorsally positioned stigmoid. 25. Detail of valve apex showing the striae structure and APF. 27. Detail of mid-valve showing dorsally deflected proximal raphe ends, small diamond-shaped central area, and slightly elongated stigmoid. Scale bars = 5 μm (Figs 24, 26), 2 μm (Fig. 27), 1 μm (Fig. 25).
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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