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36 results for “Achnanthes”
FIG. 2. — A-H, Achnanthes microcephala f. scotica J.R in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 2. — A-H, Achnanthes microcephala f. scotica J.R.Carter, type from Ardislaigh Lochan, Scotland; I-AN, Achnanthidium caledonicum (Lange-Bert.) Lange-Bert.; I-S, specimens from Lochan na Ba Ruaidhe, West Sutherland, Scotland; T-Y, specimens from Vilsalpsee, Austria; Z-AG, specimens from Brunnsee, Germany; AH-AN, specimens from Plansee, Austria; A-F, K-X, AA-AN, LM views of valves; G-J, Y, Z, LM views of frustules in girdle view. Scale bar: 10 µm.
FIGURES 36–40 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 36–40. Achnanthes licunese sp. nov. SEM, the internal view of araphid valve (ARV). 36. internal view of the whole valve. 37. central area of ARV. 38. detailed internal view of virgae and areolae 39–40. apices of ARV. Scale bars: 10 µm (36); 2 µm (37); 1 µm (38–40).
FIGURES 21–23 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 21–23. Achnanthes licunese sp. nov. SEM, girdle view. 21. a complete girdle view of the frustule and the cone-shaped spines (arrows). 22–23. middle detail of 21, showing the areolae and silica granules on the girdle bands (wavy arrows). Scale bar: 10 µm (21); 2 µm (22–23).
FIGURES 28–31 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 28–31. Achnanthes licunese sp. nov. SEM, the internal view of raphid valve (RV). 28. internal view of the whole valve. 29. central area of the valve, showing the proximal raphe ends, and central raphe endings are hookshaped. 30. detail of the internal areolae, showing the areolae is not occluded by the complex cribra. 31. apices of the valve, showing the detail view of areolae (arrows), terminal raphe fissure, helictoglossae, and margin of valve. Scale bars: 10 µm (28); 2 µm (29); 1 µm (31); 0.5 µm (30).
FIGURES 24–27 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 24–27 Achnanthes licunese sp. nov. SEM, the external view of raphid valve (RV). 24. external view of the whole valve. 26. central area of RV, showing the proximal raphe ends. 25, 27. apices of the valve, showing the terminal raphe fissure and areolae. Scale bars: 10 µm (24); 2 µm (26); 1 µm (25, 27).
FIGURES 32–35 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 32–35. Achnanthes licunese sp. nov. SEM, the external view of araphid valve (ARV). 32. external view of the whole valve. 34. central area of ARV. 33, 35. details of the apices of the valve, showing areolae and spines on the valve. Scale bars: 10 µm (32); 2 µm (34); 1 µm (33, 35).
FIGURES 3–20 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 3–20. Achnanthes licunese sp. nov. LM. 3–8. frustule in girdle view. 9–14. size diminution series of raphe valve. 15–20. size diminution series of rapheless valve. Scale bar: 10 μm.
FIGURES 1–2 in A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China
FIGURES 1–2. Achnanthes licunses sp. nov. LM, the live cells 1. An unprocessed cell in girdle view. 2. Two unprocessed cells in girdle view. Scale bar: 10 μm.
FIGURES 471–477 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 471–477. SEM micrographs of Achnanthidium lusitanicum Novais & M.Morais, sp. nov. from Boeiro, Sertã Stream (Tejo basin), 09-07-2006 (324/06). 471. Raphe valve in external view. 472. Raphe valve in internal view. 473. Rapheless valve in external view. 474. Rapheless valve in internal view. 475. Detail of the central area of a raphe valve, with the straight, not expanded, proximal raphe pores. 476. Detail of the apex of a raphe valve in external view, with the raphe ending not expanded and slightly deflected. 477. Detail of the apex of a raphe valve in internal view, with the distal raphe ending terminating in a small helictoglossa and the areolae covered by hymenes. Scale bars = 1 μm.
FIGURES 159–162 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 159–162. SEM micrographs of the type material of Achnanthes minutissima var. cryptocephala Grunow in Van Heurck (Van Heurck Types du Synopsis 238). 159. External view of a raphe valve, with the central area as a rectangular fascia. 160. Internal view of a raphe valve, with the central area as a rectangular fascia. 161. External view of a rapheless valve. 162. Internal view of a rapheless valve. Scale bars = 1 μm.
FIGURES 399–402 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 399–402. SEM micrographs of Achnanthidium duriense Novais & Ector, sp. nov. from A-do-Bispo, Torto River, Douro basin, 18-08-2007 (129/07). 399. Raphe valve in girdle view, with the row of slit-like areolae on the mantle clearly visible. 400. Detail of a raphe valve in external view, with the proximal raphe ends drop-shaped and slightly deflected unilaterally. 401. Detail of a raphe valve in external view. 402. Detail of a rapheless valve in external view, with the rounded areolae on the valve and the slit-like areolae on the mantle, including the apex. Scale bars = 1 μm.
FIGURES 259–262 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 259–262. SEM micrographs of Achnanthidium nanum (F.Meister) Novais & Jüttner, comb. nov. from Côja, Alva River (Mondego basin), 11–06–2007 (325/07). 259. Raphe valve in external view. 260. Raphe valve in internal view. 261. Rapheless valve in external view. 262. Rapheless valve in internal view. Scale bars = 1 μm.
FIGURES 386–389 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 386–389. SEM micrographs of Achnanthidium pseudolineare Van de Vijver, Novais & Ector from Covas, Coura River, Minho basin, 21–09–2007 (224/07). 386. Raphe valve in external view. 387. Raphe valve in internal view. 388. Rapheless valve in external view. 389. Rapheless valve in internal view, showing raphe vestiges. Scale bars = 1 μm.
FIGURES 140–144 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 140–144. SEM micrographs of the type material of Achnanthes minutissima Kütz. (isotype material, Kützing's Algarum Aquae Dulcis Germanicarum, Decade VIII, no. 75, Kützing 301). 140. External view of a raphe valve. 141. Internal view tilted of a raphe valve. 142. External view of a rapheless valve. 143. Internal view of a rapheless valve. 144. External view of a rapheless valve in girdle view showing the elongated, almost always slit-like, areolae of the single row along the mantle. Scale bars = 1 μm.
FIGURES 2–139 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 2–139. LM micrographs of the type material. 2–55. Achnanthes minutissima Kütz. (isotype material, Kützing's Algarum Aquae Dulcis Germanicarum, Decade VIII, no. 75, Kützing 301). 56–79. Achnanthidium microcephalum Kütz. (isotype material, Herb. Kützing n° 287). 80–125. Achnanthes minutissima var. cryptocephala Grunow in Van Heurck (Van Heurck Types du Synopsis 238). 126–139. Achnanthes minutissima var. inconspicua Østrup (Østrup collection, 753-2).
FIGURES 467–470 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 467–470. SEM micrographs of Achnanthidium lusitanicum Novais & M.Morais, sp. nov., from Janeiro de Baixo, Zêzere River (Tejo basin), 08-07-2006 (394/06). 467. Raphe valve in external view. 468. Raphe valve in internal view. 469. Rapheless valve in external view. 470. Rapheless valve in internal view. Scale bars = 1 μm.
FIGURE 1 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURE 1. Location of Portuguese Achnanthidium species. White star: A. nanum; white diamond: A. pseudolineare; white square: A. lusitanicum; white circle: A. duriense.
FIGURES 270–379 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 270–379. LM micrographs of Achnanthidium pseudolineare and A. duriense Novais & Ector, sp. nov. (holotype population). 270–290. Achnanthidium pseudolineare from Portela do Homem, Homem River, Cávado basin, 26-09-2007 (34/07). 291–333. Achnanthidium pseudolineare from Covas, Coura River, Minho basin, 21-09-2007 (224/07). 334–379. Achnanthidium duriense from Ado-Bispo, Torto River, Douro basin, type locality, 18-08-2007 (129/07). 343 is of the holotype. Scale bar = 10 μm.
FIGURES 263–269 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 263–269. SEM micrographs of Achnanthidium nanum (F.Meister) Novais & Jüttner, comb. nov. from Himalayan streams, M62, K52, Helan 16 (NMW.C.2007.006.M62, NMW.C.2007.006.K52, NMW.C.2007.006.He16). 263, 265. Raphe valves in external view. 264, 267. Rapheless valves in external view. 266. Rapheless valve in internal view. 268. Raphe valve in internal view. 269. Complete frustule in girdle view. Scale bars = 1 μm.
FIGURES 153–158 in Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
FIGURES 153–158. SEM micrographs of the type material of Achnanthidium microcephalum Kütz. (isotype material, Herb. Kützing n° 287). 153. External view of a raphe valve. 154. Internal view of a raphe valve. 155, 157. External view of a rapheless valve. 156. Internal view of a rapheless valve. 158. External view of a raphe valve in girdle view, with the slit-like areolae in the mantle clearly visible. Scale bars = 1 μm.
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