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27 results for “Achnanthidium minutissimum”
Figs 29-53 in Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
Figs 29-53. Achnanthidium maritimo-antarcticum Van de Vijver & Kopalová sp. nov. Light and scanning electron micrographs of the type population on Byers Peninsula (Livingston Island). 29-30. LM views of some frustules in girdle view. 31-40. LM views of raphe valves. 41-49. LM views of rapheless valves. 50. SEM external view of an entire raphe valve. 51. SEM external view of an entire rapheless valve. 52. SEM internal view of an entire raphe valve. 53. SEM internal view of an entire rapheless valve. Scale bars represent 10 µm.
Figs 54-77 in Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
Figs 54-77. Achnanthidium lailae Van de Vijver. Light and scanning electron micrographs of a population on Clearwater Mesa (James Ross Island). 54-56. LM views of some frustules in girdle view. 57-64. LM views of raphe valves. 65-74. LM views of rapheless valves. 75. SEM external view of an entire rapheless valve. 76. SEM internal view of an entire rapheless valve. 77. SEM external (right) and internal (left) view of an entire raphe valve. Scale bars represent 10 µm.
Figs 2-28 in Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
Figs 2-28. Achnanthidium indistinctum Van de Vijver & Kopalová sp. nov. Light and scanning electron micrographs of the type population on Byers Peninsula (Livingston Island). 2-4. LM views of some frustules in girdle view. 5-15. LM views of raphe valves. 16-24. LM views of rapheless valves. 25. SEM external view of an entire rapheless valve. 26. SEM external view of an entire raphe valve. 27. SEM internal view of an entire rapheless valve. 28. SEM internal view of an entire raphe valve. Scale bars represent 10 µm.
Figs 78-103 in Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
Figs 78-103. Achnanthidium sieminskae Witkowski, Kulikovskiy & Riaux-Gobin. Light and scanning electron micrographs of a population on Iles Kerguelen. 78-80. LM views of some frustules in girdle view. 81-91. LM views of raphe valves. 92-99. LM views of rapheless valves. 100. SEM external view of an entire raphe valve. 101. SEM internal view of an entire raphe valve. 102. SEM external view of an entire rapheless valve. 103. SEM internal view of an entire rapheless valve. Scale bars represent 10 µm.
Figs. 47-82. 47- 48. Achnanthidium minutissimum Morfotipo I in DiAtomáceAs epilíticAs de sistemAs lóticos NA suB-BAciA hidrográficA do Arroio Grande, Rio Grande do Sul, Brasil
Figs. 47-82. 47- 48. Achnanthidium minutissimum Morfotipo I; 49-50. A. minutissimum Morfotipo II; 51-52. A. exiguum var. constrictum; 53- 54. A. microcephalum; 55-57. Planothidium bagualensis; 58-59. P. rostratum; 60- 61. P. incuriatum; 62-63. P. sp; 64- 65. Platessa hustedtii; 66-67. Achnanthes inflata; 68-69. A. sp; 70-71. A. ziegleri; 72- 73. A. paraexigua; 74. Neidium ampliatum; 75-76. Humidophila contenta; 77. H. subtropica; 78-79. Luticola goeppertiana; 80. L. mutica; 81. L. peguana; 82. L. simplex. Barras =10µm.
Fig. 1 in Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
Fig. 1. The Antarctic region with the location of the sampled islands and archipelagos.
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.
FIGURES 171–174 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 171–174. SEM micrographs of the type material of Achnanthes minutissima var. inconspicua Østrup (Østrup collection, 753–2). 171. External view of a raphe valve, with central area as a rectangular fascia. 172. Internal view of a raphe valve. 173. External view of raphe valve with a single row of slit-like areolae, clearly visible on the mantle. 174. External view of a rapheless valve. Scale bars = 1 μm.
FIGURES 403–466 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 403–466. LM micrographs of Achnanthidium lusitanicum Novais & M.Morais, sp. nov. 403–445. Janeiro de Baixo, Zêzere River (Tejo basin), 08–07–2006 (394/06), type locality; 443 is of the holotype. 446–466. Boeiro, Sertã Stream (Tejo basin), 09-07-2006 (324/06). Scale bar = 10 μm.
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