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117 results for “Achnanthidium”
FIGURES 166–193 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 166–193. LM and SEM images of Achnanthidium peruvianum from from Salto do Iporanga reservoir, São Paulo state (SP- 469207). 166–176. LM views of raphe valves. 177–186. LM views of rapheless valves. 187–189. Girdle views of the taxon. 190–192. SEM external view of raphe valves showing striation pattern, axial and central areas. 193. SEM external view of the rapheless valve showing striation pattern, axial and central areas. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 72–99 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 72–99. LM and SEM images of Achnanthidium lusitanicum from Guarapiranga reservoir, São Paulo state (SP-428513). 72–83. LM views of raphe valves. 84–95. LM views of rapheless valves. 96, 97. SEM external view of raphe valves showing striation pattern, axial and central areas. 98. SEM external view of the rapheless valve showing striation pattern, axial and central areas. 99. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 260–275 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 260–275. LM and SEM images of Achnanthidium tropicocatenatum from Santa Helena reservoir, São Paulo state (SP-469524). 260–267. LM views of raphe valves. 268–273. LM views of rapheless valves. 274. SEM external view of raphe valve showing striation pattern, axial and central areas. 275. SEM external view of the rapheless valve showing striation pattern, axial and central areas. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURE 1 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURE 1. Sampling sites distributed in 22 basins in the state of São Paulo, Brazil. Red squares: AcquaSed Project sampling sites. Grey circles: Biota project sampling sites.
FIGURES 2–25 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 2–25. LM and SEM images of Achnanthidium acutum sp. nov. from type material (SP-427898), Rio Grande reservoir, São Paulo state. Figure 17 corresponds to the holotype. 2–12. LM views of raphe valves. 13–20. LM views of rapheless valves. 21. SEM external view of raphe valves showing striation pattern, axial and central areas. 22. SEM external detail of the distal raphe end. 23. SEM external view of the rapheless valve showing striation pattern, axial and central areas. 24. SEM internal view of the raphe valve. 25. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 194–214 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 194–214. LM and SEM images of Achnanthidium ritae sp. nov. from the type (SP-427904) from Billings complex, Taquacetuba branch, São Paulo state. Figure 205 corresponds to the holotype. 194–201. LM views of raphe valves. 202–210. LM views of rapheless valves. 211. SEM external view of raphe valve showing striation pattern, axial and central areas. 212. SEM internal view of the raphe valve. 213. SEM external view of the rapheless valves showing striation pattern, axial and central areas. 214. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 238–259 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 238–259. LM and SEM images of Achnanthidium tropicocatenatum from Cachoeira do França reservoir, São Paulo state (type locality, SP-469430). 238–243. LM views of raphe valves. 244–251. LM views of rapheless valves. 252, 253. Girdle views of the taxon. 254. SEM external view of raphe valve showing striation pattern, axial and central areas. 255. SEM internal view of the raphe valve. 256. SEM internal detail of the proximal raphe end. 257, 258. SEM external view of the rapheless valves showing striation pattern, axial and central areas. 259. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 100–116 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 100–116. LM and SEM images of Achnanthidium parvicapitatum sp. nov. from the type (SP-469524) from Santa Helena reservoir, São Paulo state. Figure 108 corresponds to the holotype. 100–105. LM views of raphe valves. 106–111. LM views of rapheless valves. 112. Girdle view of the new taxon. 113. SEM external view of raphe valve showing striation pattern, axial and central areas. 114. SEM internal view of the raphe and rapheless valves. 115. SEM external view of the rapheless valves showing striation pattern, axial and central areas, including the presence of two small punctuations on central area. 116. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 45–71 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 45–71. LM and SEM images of Achnanthidium lusitanicum from Garças Lake, São Paulo state (SP-469485). 45–56. LM views of raphe valves. 57–65. LM views of rapheless valves. 66, 67. SEM external view of raphe valves showing striation pattern, axial and central areas. 68. SEM internal view of the raphe valve. 69, 70. SEM external view of the rapheless valves showing striation pattern, axial and central areas. 71. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 144–165 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species
FIGURES 144–165. LM and SEM images of Achnanthidium peetersianum from Rifaína city, São Paulo state (SP371175). 144–154. LM views of raphe valves. 155–157. LM views of rapheless valves. 158, 159. Girdle views of the taxon. 160–162. SEM external view of raphe valves showing striation pattern, axial and central areas and the terminal raphe fissures deflected. 163. SEM internal view of the raphe valve. 164, 165. SEM external view of the rapheless valves showing striation pattern, axial and central areas. LM scale bar = 10 μm. SEM scale bars indicated in each figure.
FIGURES 43–52 in Achnanthidium lucectorii sp. nov. and A. enigmaticum sp. nov., novel diatoms (Bacillariophyta, Achnanthidiaceae) from Texas, U.S.A.
FIGURES 43–52. Achnanthidium enigmaticum sp. nov. (LM) from type material. 43–54. RV arranged in size diminution series, Figures 53 and 54 correspond to the same frustule, 54 being a SV; Figure 48 corresponds to the holotype. 55–59. SV arranged in increasing size order. Notice axial area expanded in central area and clearly observable areolae along striae. Scale bar = 10 µm.
FIGURES 37–42 in Achnanthidium lucectorii sp. nov. and A. enigmaticum sp. nov., novel diatoms (Bacillariophyta, Achnanthidiaceae) from Texas, U.S.A.
FIGURES 37–42. Achnanthidium lucectorii sp. nov. (SEM) from type material. 37–39. RV in external view. Striae are more densely packed toward valve apices (open arrows in 38), Figure 39 shows straight distal ends of raphe extending beyond the striation region (white arrows). 40. Internal view of RV showing small capitate termini of proximal raphe ends (white arrows) and valve apex low thickening attached to low helictoglossum (black arrow). 41, 42. External view of RV and internal view of SV. Figure 42 shows internal view of SV. Scale bars = 5 μm.
FIGURES 60–65 in Achnanthidium lucectorii sp. nov. and A. enigmaticum sp. nov., novel diatoms (Bacillariophyta, Achnanthidiaceae) from Texas, U.S.A.
FIGURES 60–65. Achnanthidium enigmaticum sp. nov. (SEM) from type material. 60, 61. RV in external view. Notice expanded proximal raphe ends (white arrows in 60), and distal raphe ends bent and deflected in the same direction (white arrows in 61). 62, 63. Internal views of RV showing the proximal raphe ends that are slightly bent and deflected in opposite directions (white arrow in 63) and the low helictoglossum separated from the valve apex (black arrow in 63). 64, 65. External view of SV. Scale bars = 5 µm (60, 61, 63, 65); 10 µm (62, 64).
FIGURES 1–36 in Achnanthidium lucectorii sp. nov. and A. enigmaticum sp. nov., novel diatoms (Bacillariophyta, Achnanthidiaceae) from Texas, U.S.A.
FIGURES 1–36. Achnanthidium lucectorii sp. nov. (LM) from type material. 1–21. RV views arranged by size. Notice bow-tie fascia and stauros in central area, Fig. 10 corresponds to the holotype. 22, 23. Girdle views of two complete frustules. 24–36. SV arranged in size diminution series. Notice lanceolate axial area and clearly seen striae. Scale bar = 10 μm.
Figure 1 from: Tseplik ND, Maltsev YI, Glushchenko AM, Kuznetsova IV, Genkal SI, Gusev ES, Kulikovskiy MS (2021) Achnanthidium gladius sp. nov. (Bacillariophyceae) – a new monoraphid diatom species from Indonesia. PhytoKeys 187: 129-140. https://doi.org/10.3897/phytokeys.187.73913
Figure 1 Phylogenetic position of Achnanthidium gladius Ind391 (indicated in bold) based on Bayesian inference for the partial 18S rDNA gene. Total length of the alignment is 441 characters. Bootstrap supports from ML (constructed by RaxML) are presented above the horizontal lines (slash). Posterior probabilities from BI (constructed by Beast) are presented below the horizontal lines (slash). Only BS and PP above 50 and 0.9 are shown. All sequences have strain numbers (if available) and GenBank numbers.
Figure 3 from: Tseplik ND, Maltsev YI, Glushchenko AM, Kuznetsova IV, Genkal SI, Gusev ES, Kulikovskiy MS (2021) Achnanthidium gladius sp. nov. (Bacillariophyceae) – a new monoraphid diatom species from Indonesia. PhytoKeys 187: 129-140. https://doi.org/10.3897/phytokeys.187.73913
Figure 3 A–HAchnanthidium gladius Tseplik, Kulikovskiy, Glushchenko & Genkal, sp. nov. SEM. Sample no 04123. A–F raphe valves G, H rapheless valves A–C, G, H external views D–F, H internal views. Scale bars: 2 μm (A, D, G, H), 1 μm (C, F), 0.5 μm (B, E).
Figure 2 from: Tseplik ND, Maltsev YI, Glushchenko AM, Kuznetsova IV, Genkal SI, Gusev ES, Kulikovskiy MS (2021) Achnanthidium gladius sp. nov. (Bacillariophyceae) – a new monoraphid diatom species from Indonesia. PhytoKeys 187: 129-140. https://doi.org/10.3897/phytokeys.187.73913
Figure 2 A–XAchnanthidium gladius Tseplik, Kulikovskiy, Glushchenko & Genkal, sp. nov. LM, DIC, size diminution series. Slide no 04123. A–L raphe valves M–X rapheless valves. Holotype (G). Scale bar: 10 μm.
Figure 2 from: Kapustin DA, Glushchenko AM, Kulikovskiy MS (2022) Achnanthidium bratanense sp. nov. (Bacillariophyceae, Achnanthidiaceae), a new diatom from the Lake Bratan (Bali, Indonesia). PhytoKeys 188: 167-175. https://doi.org/10.3897/phytokeys.188.77882
Figure 2 A–GAchnanthidium bratanense sp. nov. (SEM). A, B raphe valve, external view C, D rapheless valve, external view E, F raphe valve, internal view G rapheless valve, internal view. Scale bar: 1 μm.
Figure 1 from: Kapustin DA, Glushchenko AM, Kulikovskiy MS (2022) Achnanthidium bratanense sp. nov. (Bacillariophyceae, Achnanthidiaceae), a new diatom from the Lake Bratan (Bali, Indonesia). PhytoKeys 188: 167-175. https://doi.org/10.3897/phytokeys.188.77882
Figure 1 A–TAchnanthidium bratanense sp. nov. (LM). A–S size diminution series showing variation in valve outline A holotype specimen A-D, F-I, K, M, N, R raphe valves E, J, L, O-Q, S rapheless valves T frustule in girdle view. Scale bar: 10 μm.
Figures 7 from: Yu P, You Q, Pang W, Wang Q (2022) Two new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Qingxi River, China. PhytoKeys 192: 11-28. https://doi.org/10.3897/phytokeys.191.78489
Figures 7 A–EAchnanthidium qingxiense sp. nov., SEM internal views of raphe valve A, B internal view of an entire raphe valve C apices of the valve, showing the distal raphe ends E central area of the valve, showing the proximal raphe ends D internal areola openings with fine hymenate structures. Scale bars 5 µm (A, B); 1 µm (C, E); 0.3 µm (D).
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