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82 results for “Eunotia”
FIGURES 19–27. E in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China
FIGURES 19–27. E. filiformis sp. nov. 19–22. LM images; 21. Holotype; 23–27. SEM images; 23–24 Terminal ends of internal valve, arrow show a hyaline areas; 25–26. Terminal ends of external valve, arrow show terminal raphe fissures; 27. External valve view. LM scale bars, 10 μm.
FIGURE 1 in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China
FIGURE 1. Location of Mugecuo Scenic Area. Distribution of sample collection sites are indicated by black dots.
FIGURES 2–18. E in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China
FIGURES 2–18. E. mugecuo sp. nov.. 2–13. LM images; 6. Holotype; 14–18 SEM images; 14. External valve end; 15. External valve view; 16. Internal valve view; 17–18. Terminal ends of internal valve, arrow show a rimoportula. LM scale bars, 10 μm.
FIGURES 31‒33 in Eunotia itacueretabaensis sp. nov. (Bacillariophyceae, Eunotiaceae) from the Campos Gerais region, Southern Brazil
FIGURES 31‒33. Eunotia itacueretabaensis Tremarin, Bartozek, C.K.Peres & C.C.Z.Branco sp. nov., SEM images. Fig 31. Three frustules united in chain. Fig 32. Frustule in girdle view showing the valvar mantle and the girdle bands in the ventral side. Fig 33. Detail of the frustule end showing the valvar mantle and the girdle bands in the ventral side.
FIGURES 25‒30 in Eunotia itacueretabaensis sp. nov. (Bacillariophyceae, Eunotiaceae) from the Campos Gerais region, Southern Brazil
FIGURES 25‒30. Eunotia itacueretabaensis Tremarin, Bartozek, C.K.Peres & C.C.Z.Branco sp. nov., SEM images. Figs 25 and 26. External and internal overview of the valve showing the striation pattern. Figs 27 and 28. Valvar end in external view showing the raphe branch. Figs 29 and 30. Valvar ends in internal view showing the helictoglossa (black arrows in Fig 29 and 30) and rimoportula (white arrow in Fig 30).
FIGURES 4‒24 in Eunotia itacueretabaensis sp. nov. (Bacillariophyceae, Eunotiaceae) from the Campos Gerais region, Southern Brazil
FIGURES 4‒24. Eunotia itacueretabaensis Tremarin, Bartozek, C.K.Peres & C.C.Z.Branco sp. nov., LM images. Figs 4‒21. Valve views showing the size diminution series. Note the rimoportula in the Figs 7, 9, 10 (arrows). Figs 22‒24. Frustules in girdle view joined in ribbon-like chains. Fig. 7. Holotype specimen. Scale bar: 10 µm.
FIGURES 1‒3 in Eunotia itacueretabaensis sp. nov. (Bacillariophyceae, Eunotiaceae) from the Campos Gerais region, Southern Brazil
FIGURES 1‒3. Fixed material showing long chains of Eunotia itacueretabaensis Tremarin, Bartozek, C.K.Peres & C.C.Z.Branco sp. nov., LM images.
FIGURES 24–25 in Eunotia pottieziana, a new diatom (Eunotiaceae, Bacillariophyta) species found in a tropical aquarium
FIGURES 24–25. Eunotia pottieziana Van de Vijver sp. nov. LM images of specimens taken from the holotype sample (BR-4816, tropical freshwater aquarium, Belgium). 24. LM view of several living cells, loosely attached to the substrate. 25. LM view of two Centropyxis tests covered with living Eunotia frustules (arrows). Scale bar =20 µm (Fig. 24) and 50 µm (Fig. 25).
FIGURES 16–23 in Eunotia pottieziana, a new diatom (Eunotiaceae, Bacillariophyta) species found in a tropical aquarium
FIGURES 16–23. Eunotia pottieziana Van de Vijver sp. nov. SEM images taken from the holotype sample (BR-4816, tropical freshwater aquarium, Belgium). 16. SEM view of a short chain showing 3 connected frustules. 17. SEM external detail of the apices of a frustule, showing the shape of the raphe branches and the girdle bands. 18. SEM external view of the ventral side of an entire frustule. 19. SEM externa detail of the dorsal valve face/mantle junction showing the presence of short, low ridges. 20. SEM external view of two valves. 21. SEM external detail of a valve apex showing the terminal raphe fissures and the external rimoportula opening (arrow). 22. SEM internal view of an entire valve. The arrow shows the position of the internal rimoportula structure. 23. SEM internal detail of a valve apex with the rimoportula (apex) and the pseudoseptum. Scale bars represent 10 µm, except for Figs 19, 21 & 23 where scale bar = 1 µm.
FIGURES 1–15 in Eunotia pottieziana, a new diatom (Eunotiaceae, Bacillariophyta) species found in a tropical aquarium
FIGURES 1–15. Eunotia pottieziana Van de Vijver sp. nov. LM images of specimens taken from the holotype sample (BR-4816, tropical freshwater aquarium, Belgium). 1–2. LM views of two short chains in girdle view observed in untreated material. 3. LM view of the ventral side of a frustule showing the raphe branches. 4–15. LM valve views of specimens of the type population arranged in decreasing length. Scale bar = 10 µm.
FIGURES 18–23. Eunotia relicta. SEM images. Fig. 18 in A new uncommon epilithic Eunotia (Bacillariophyceae, Eunotiaceae) from the Chapada Diamantina region, Northeast Brazil
FIGURES 18–23. Eunotia relicta. SEM images. Fig. 18. Valve apices showing conical spine and drop-shaped terminal raphe endings. Figs 19, 20. Detail of the mantle striation pattern. Note the closer striae in the apices. Fig. 21. General view of internal valve. Figs 22–23. Detail of valve apices internally. Note the presence of well-developed rimoportulae at both extremities. Note the cell wall internally thickened at the apical regions. Scale bars: 5 µm for figures 18, 20, 22 and 23; 2 µm for figure 19; 10 µm for figure 21.
FIGURES 2–12 in A new uncommon epilithic Eunotia (Bacillariophyceae, Eunotiaceae) from the Chapada Diamantina region, Northeast Brazil
FIGURES 2–12. Eunotia relicta. LM and SEM images. Figs 2–5, 6–10. Valve view showing general patterns of valve outline, apices and striae. Fig. 11. Girdle view showing ventral margins, mantle and girdle bands. Note the whole frustule showing deflection of valve faces, laterally visible. Note also the raphe branches and central nodules at the mantle. Fig. 12. External valve face showing an irregular surface and striae. Note the striae not interrupted in the dorsal side, continuing onto the valve mantle. Observe the raphe branches entering the valve face in the ventral side, and the conical spines at valve apices. Scale bars: 20 µm for figures 2–11; 10 µm for figure 12.
FIGURES 13–17. Eunotia relicta. SEM images. Fig. 13 in A new uncommon epilithic Eunotia (Bacillariophyceae, Eunotiaceae) from the Chapada Diamantina region, Northeast Brazil
FIGURES 13–17. Eunotia relicta. SEM images. Fig. 13. Girdle view showing girdle bands in the dorsal valve side. Fig. 14. Detail of valve face and mantle. Note the thickened and irregular transapical interstriae between groups of striae. Fig. 15. Details of striation pattern of girdle bands. Fig. 16. Valve face view showing irregular surface. Note the interstriae and spines in the apices. Fig. 17. Girdle view showing girdle bands broader at the dorsal side. Note the amphoroid frustule symmetry. Scale bars: 10 µm for figures 13, 14, 16 and 17; 2 µm for figure 15.
FIGURES 125–133 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 125–133. Eunotia spatulata sp. nov., internal views, SEM. Figs 125–128, 130 and 132, 131 and 133 each represent parts of the same specimen. Figs. 125 Complete valve. Figs 126, 130, 131 Details of apices without rimoportulae, showing more densely spaced striae and the internally occluded raphe extending past the helictoglossa. Figs 127, 129 Apices with prominent rimoportulae adjacent to helictoglossae. Fig. 128 Detail of the central part of the valve, with internally unoccluded round areolae and parallel striae. Figs 132, 133 Partial valves including the widened central portion of the valve and subapical attenuation. Scale bars = 10 µm (in Figs 125, 132, 133) or 1 µm (in Figs 126–131).
FIGURES 104–117 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 104–117. Eunotia spatulata sp. nov., LM. Figs 104b, 105b, 107b Details of apices with rimoportulae and helictoglossae in focus. Fig. 112 Together with Eunotia novaeangliae. Fig. 114 Photograph of the holotype specimen (H). Fig. 116 Micrograph of the isotype specimen (Is). Pairs of photographs representing the same specimen in different focal planes or two various parts of the same valve are marked with "=". Scale bar = 10 µm.
FIGURES 118–124 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 118–124. Eunotia spatulata sp. nov., external views, SEM. Figs 118–120, 121–122, 123–124 each represent parts of the same specimen. Fig. 118 Incomplete valve, although still showing the straight long valve, narrowing very gradually and slightly from the center to the subapical portion, with a widely spatulate apex. Fig. 119 Apex without rimoportula. Figs 120, 124 Details of middle parts of the valves with sharply beveled edges. Figs 121–123 Apices with rimoportula apertures and well-developed siliceous ridges at the apical valve margins. Fig. 122 Detail of externally occluded rounded areolae. Scale bars = 10 µm (in Fig. 118) or 1 µm (in Figs 119–124).
FIGURES 56–66 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 56–66. Size reduction series of Eunotia panda sp. nov., LM (part 1 – upper size range). Scale bar = 10 µm.
FIGURES 96–103 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 96–103. Eunotia panda sp. nov., internal views, SEM. Figs 97–99 and 100–102 each represent the same specimen. Figs 96, 97, 100 Valve views. Figs 98, 102 Apices without rimoportulae. Figs 99, 101, 103 Apices with large rimoportulae. Scale bars = 10 µm (in Figs 96–97) or 1 µm (in Figs 98–103).
FIGURES 87–95 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 87–95. Eunotia panda sp. nov., external views, SEM. Figs 87–90 and 91–92 each represent parts of the same specimen. Figs 87, 91 Whole valves. Figs 88, 90, 92, 93, 95 Apices with raphe fissures reflexed proximally and terminating ca. in the center of the valve face. Irregular small protrusions are evident between the striae at the tip of each apex, and the beveled, rather sharp edges of the valve face. Fig. 89 Detail of striae lowered in between hyaline ridges in the central part of the valve with the sharply beveled valve edges. Fig. 94 Detail of unoccluded rounded to irregularly shaped areolae. Scale bars = 10 µm (in Figs 87, 91), 1 µm (in Figs 88–90, 92–93, 95) or 100 nm (in Fig. 94).
FIGURES 67–86 in Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA
FIGURES 67–86. Size reduction series of Eunotia panda sp. nov., LM (part 2 – lower size range). Fig. 71 Photograph of the holotype specimen (H). Fig. 74 Photograph of the isotype specimen (Is). Scale bar = 10 µm.
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