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20 results for “Brachysira”
FIGURES 136–172. Brachysira microcephala morphotype BMIC-1. Figs 136–165 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 136–172. Brachysira microcephala morphotype BMIC-1. Figs 136–165. LM. Figs 166–172. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 111–135. Brachysira garrensis. Figs 111–130 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 111–135. Brachysira garrensis. Figs 111–130 LM. Fig. 135–SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURE 1 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURE 1. Ireland. (a) Map showing the location of the sampling sites and the distribution of the primary acidic bedrock geology. The regions and lakes indicated are referred to in the text. (b) Brachysira species as % of all diatom species at sites. (c) number of Brachysira species at sites. Light grey refers to river sites and dark grey refers to lakes in (b) and (c).
FIGURES 25–33 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 25–33. Brachysira conamarae sp. nov. Figs 25–26. LM. Fig. 25. Holotype specimen (TCD0018138). Figs 27–33. SEM. Fig. 27. External view of an elongate valve with slightly more prominent axial area. Figs 28–30. Variation in valve morphology apparent for the holotype population with varying pattern of occurrence of papillae over the valve face. Fig. 31. Oblique valve in tilt illustrating ultrastructural features. Fig. 32. Detail of the centre of the frustule with papillae over the entire valve face. Fig. 33. Detail of the valve end and T-shape distal raphe endings. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 3–24 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 3–24. Brachysira praegeri sp. nov. Figs 3–18. LM. Fig. 8. Holotype specimen. Figs 7–10. Range of valves from the holotype population (TCD0018137) L. Nambrackmore. Figs 3–6, 11–17. Valves showing morphological range and size variation in other populations. Fig. 18. A teratological valve giving the abnormal impression of rostrate ends. Figs 19–24. SEM. Fig. 19. External view. Fig. 20. Internal view. Figs 21–24. Variation in valve outline and occurrence of papillae in the central area. Scale bar in Fig. 18 = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 52–60. Brachysira vitrea. Figs 52–56 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 52–60. Brachysira vitrea. Figs 52–56. LM. Figs 57–60. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 240–252. Brachysira microcephala morphotype BMIC-4. Figs 240–246 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 240–252. Brachysira microcephala morphotype BMIC-4. Figs 240–246. LM. Figs 247–252. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 206–239. Brachysira microcephala morphotype BMIC-3. Figs 206–229 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 206–239. Brachysira microcephala morphotype BMIC-3. Figs 206–229. LM. Figs 230–239. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 44–51. Brachysira liliana. Figs 44–47 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 44–51. Brachysira liliana. Figs 44–47. LM. Figs 48–51. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 99–110 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 99–110. Brachysira sp. (aff. B. intermedia). Figs 99–105. LM. Figs 106–110. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 34–43. Brachysira styriaca and Brachysira zellensis. Figs 34–40. B in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 34–43. Brachysira styriaca and Brachysira zellensis. Figs 34–40. B. styriaca, LM. Fig. 41. B. styriaca, SEM. Fig. 42. B. zellensis, LM. Fig. 43. B. zellensis, SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 61–80. Brachysira neglectissima. Figs 61–70 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 61–80. Brachysira neglectissima. Figs 61–70. LM. Figs 71–80. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 81–98. Brachysira brebisssonii and Brachysira intermedia. Figs 81–91. B in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 81–98. Brachysira brebisssonii and Brachysira intermedia. Figs 81–91. B. brebissonii, LM. Figs 92–94. B. intermedia, LM. Fig. 95. SEM, B. intermedia. Figs 96–98. SEM, B. brebissonii. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURE 1 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURE 1. Geographical position of Iles Kerguelen in the southern hemisphere and the position of the study area on Grand Terre, the main island of Iles Kerguelen (indicated by *)
FIGURES 48–52 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 48–52. Navicula brachysira. All pictures taken from the type population (Falaise). Fig. 48. External view of an entire valve showing the most typical features such as the marginal ridge, the striae always composed of (2)3 areolae, the simple raphe endings and the mantle striae. Fig. 49. Detail view of the central area. Not the presence of the papillae, the regular length of the areolae and the simple proximal raphe endings. Fig. 50. External detail of a valve apex with the typical axial ridge terminating before the marginal ridge, the simple, almost straight distal raphe endings, the T-shaped raphe groove near the apex and the diminishing number of areolae per stria. Fig. 51. Internal view of an entire valve. Fig. 52. Internal detail of the central area with the typical weakly bent proximal raphe endings and the porous hymenate internal coverings of the striae. Scale bar represents 10 µm, except for Figs 49, 50 & 52 where scale bar = 5 µm.
FIGURES 2–41 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 2–41. LM. Brachysira sandrae (2–26) and Navicula brachysira (27–41). Figs 2–26. Brachysira sandrae, pictures taken from the holotype population (sample B13) from the Val Travers area. Figs 27–41. Navicula brachysira, pictures taken from the type population found in material collected by A. de Brébisson in Falaise and deposited in the Botanic Garden Meise. Scale bar represents 10 µm.
FIGURES 1–19 in Brachysira heteropolaris, a new diatom (Brachysiraceae, Bacillariophyta) species observed in an historic Weissflog slide from Scotland (UK)
FIGURES 1–19. Light micrographs of Brachysira heteropolaris Van de Vijver sp. nov. LM images taken from the holotype population (IX-18-A8, Weissflog slide Loch Canmor, Aberdeenshire 2, Scotland, UK). LM views of the population arranged in decreasing length. Scale bar = 10 µm.
FIGURE 2 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURE 2. The distribution of the more abundant Brachysira taxa in Irish lakes and rivers.
FIGURES 173–205. Brachysira microcephala morphotype BMIC-2. Figs 173–197 in A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies
FIGURES 173–205. Brachysira microcephala morphotype BMIC-2. Figs 173–197. LM. Figs. 198–205. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.
FIGURES 42–47 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 42–47. Brachysira sandrae. All pictures taken from the holotype population (sample B13). Fig. 42. External view of an entire valve showing the most typical features such as the marginal ridge, the striae composed of 2–4 areolae, the simple raphe endings and the mantle striae. Fig. 43. External view of an entire valve in oblique position showing clearly the marginal ridge and the ridge bordering the raphe. Fig. 44. Detail view of the central area. Not the presence of the papillae, the irregular length of the areolae and the simple proximal raphe endings. Fig. 45. External detail of a valve apex with the typical axial ridge terminating before the marginal ridge, the simple, almost straight distal raphe endings and the diminishing number of areolae per stria. Fig. 46. Internal view of an entire valve. Fig. 47. Internal detail of the central area with the typical weakly bent proximal raphe endings. Scale bar represents 10 µm, except for Figs 44 & 47 where scale bar = 5 µm.
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