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Dataset results
33 results for “Oricymba”
FIGURES 1–9 in Oricymba gongshanensis sp. nov. (Cymbellaceae; Bacillariophyceae), a new species from southwest China
FIGURES 1–9 Oricymba gongshanensis, LM, DIC. Valve views, showing size range and variability of the holotype population. Scale bar = 10 μm.
FIGURES 17–19 in Oricymba gongshanensis sp. nov. (Cymbellaceae; Bacillariophyceae), a new species from southwest China
FIGURES 17–19 Oricymba gongshanensis, SEM, internal views. Fig. 17. Internal view of entire valve. Fig. 18. Internal view of valve apex with prominent helictoglossa deflecting to the dorsal side. Fig. 19. Showing the valve centre and 2 stigmata as elongated furrows connected to the striae. Scale bar = 2 μm.
FIGURES 66–71 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 66–71. Oricymba fanjingensis sp. nov., SEM internal view. 66, 67. Two complete valves. 68. Middle part from Fig. 66, note two slit-like openings of stigma (two arrows) and the central raphe endings invisible because obscured by flap over central nodule (wavy arrow). 69, 70. Apical details from Fig. 66, note the areola internal openings occluded by dentate projections and the marginal ridges (four arrows). 71. Detail from Fig. 70, note the internal apertures of each pervalvar row of foramina. Scale bars = 5 μm (Figs 66–67), 1 μm (Figs 68–71).
FIGURES 54–59 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 54–59. Oricymba fanjingensis sp. nov., SEM external view. 54. A complete valve, note two marginal ridges (four arrows) and two valve surface ridges (four wavy arrows). 55–57. Details from Fig. 54, note the marginal ridges (arrows), valve surface ridges (wavy arrows), and a groove between the marginal ridge and its adjacent surface ridge (double-headed arrows). 58, 59. Apical details from Fig. 54, note a notch on the dorsal side of distal raphe fissure (two arrows), the differentiated apical pore field clearly separated from the areolae. Scale bars = 5 μm (Figs 54, 56–57), 1 μm (Figs 55, 58–59).
FIGURES 40–53 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 40–53. Oricymba fanjingensis sp. nov., LM. 40–53. 14 valves showing a size diminution series, note the apiculate valve apices. Fig. 40. Illustration of holotype specimen. Scale bar = 10 μm (in Fig. 1).
FIGURES 28–33 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 28–33. Oricymba sinensis sp. nov., SEM external view. 28. A tilted frustule, note the marginal ridge on the ventral side of valve is inconspicuous (three black arrows). 29, 30, 32. Details from Fig. 28, note the marginal ridge on the ventral side of valve is very slightly raised (arrows). 31, 33. Apical details from Fig. 30 and Fig. 32 respectively, note the top foramina of apical pore field are elongate (arrows), which are different from the other rounded foramina. Scale bars = 5 μm (Fig. 28), 1 μm (Figs 29–33).
FIGURES 16–21 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 16–21. Oricymba sinensis sp. nov., SEM external view. 16. A tilted frustule, note a marginal ridge present on the dorsal side of valve (three black arrows). 17. Detail from Fig. 16, note the marginal ridge (two black arrows) and shallow depressions in the axial and central area (white arrows). 18, 20. Apical details from Fig. 16, note the marginal ridge (two black arrows), the valve face and the mantle almost met at a right angle, and the abvalvar part of mantle without ornaments (Fig. 20, double-headed arrow). 19, 21. Details from Fig. 18 and Fig. 19, respectively, note a notch on the dorsal side of distal raphe fissure (wavy arrows), the differentiated apical pore field clearly separated from the areolae (straight arrows), and the abvalvar part of mantle without ornaments (double-headed arrows). Scale bars = 5 μm (Fig. 16), 1 μm (Figs 17–21).
FIGURES 60–65 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 60–65. Oricymba fanjingensis sp. nov., SEM external view. 60–62. Three complete valves, note the marginal ridges and its adjacent surface ridges. 63–65. Details from Fig. 62, note a groove between two adjacent ridges (double-headed arrows). Scale bars = 5 μm (Figs 60–62), 1 μm (Figs 63–65).
FIGURES 1–15 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 1–15. Oricymba sinensis sp. nov., LM. Valves arranged in a size diminution series. Note the conspicuous dorsiventrality. Fig. 1 corresponds to the holotype specimen. Scale bar = 10 μm (in Fig. 1).
FIGURES 22–27 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 22–27. Oricymba sinensis sp. nov., SEM external view. 22. A slightly tilted frustule, note the lateral raphe. 23, 24, 26. Details from Fig. 22, note the areola openings curved or lunate adjacent to the axial area (arrows). 25, 27. Apical details from Fig. 24 and Fig. 26 respectively, note the top foramina of apical pore field are elongate (arrows), which are different from the other rounded foramina. Scale bars = 5 μm (Fig. 22), 1 μm (Figs 23–27).
FIGURES 34–39 in Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field
FIGURES 34–39. Oricymba sinensis sp. nov., SEM internal view. 34. A complete valve, note the internal straight raphe fissure. 35. Middle part from Fig. 34, note two slit-like openings of stigma (two arrows) and the proximal raphe endings not visible as they are obscured by flap above central nodule (two wavy arrows). 36, 38. Apical details from Fig. 34, note the areola internal openings occluded by dentate projections. 37. Detail from Fig. 36, note the apical pore field clearly separated from the other parts of valve (two arrows). 39. Apical detail from another valve not included in this plate, note an undulate flap-like silica strip covering the internal apertures of each pervalvar row of foramina, not completely occluding internal apertures (two arrows). Scale bars = 5 μm (Fig. 34), 1 μm (Figs 35–39).
FIGURES 26–43 in The diatom genus Oricymba in Vietnam and Laos with description of one new species, and a consideration of its systematic placement
FIGURES 26–43. Oricymba subovalis. LM. Valve views showing size range. Scale bar = 10 μm.
FIGURES 1–21 in The diatom genus Oricymba in Vietnam and Laos with description of one new species, and a consideration of its systematic placement
FIGURES 1–21. Oricymba japonica. LM. Valve views showing size range. Scale bar = 10 μm.
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