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12,393 results for “materiality”
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.
FIGURES 380–385 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 380–385. SEM micrographs of Achnanthidium pseudolineare Van de Vijver, Novais & Ector from Portela do Homem, Homem River, Cávado basin, 26-09-2007 (34/07). 380. Raphe valve in external view. 381. Raphe valve in internal view. 382. Rapheless valve in external view. 383. Rapheless valve in internal view. 384. Detail of a raphe valve in external view, with the straight, not expanded, proximal pores and distal ending. The elongated, mostly slit-like areolae on the mantle are clearly visible. 385. Detail of a raphe valve in internal view, with the straight raphe ending, terminating in a small helictoglossa. Scale bars = 1 μm.
FIGURES 390–394 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 390–394. SEM micrographs of Achnanthidium pseudolineare Van de Vijver, Novais & Ector from Covas, Coura River, Minho basin, 21–09–2007 (224/07). 390. Detail of the apex of a raphe valve in external view, with the straight distal raphe ending. 391. Detail of the central area of a raphe valve in external view, bordered by spaced shorter striae formed by transapically elongated areolae, and the straight, not expanded, proximal pores. 392. Detail of the apex of a raphe valve in internal view, with the raphe ending in a small helictoglossa. 393. Detail of the apex of a rapheless valve in internal view. 394. Complete frustule in girdle view, with the slit-like areolae on the mantle. Scale bars = 1 μm.
FIGURES 175–258 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 175–258. LM micrographs of the type material and several populations of Achnanthidium nanum (F.Meister) Novais & Jüttner, comb. nov. from Portugal, Nepal, Scotland and Switzerland. 175–214. Côja, Alva River, Mondego basin, Portugal, 11-06-2007 (325/07). 215–238. Himalayan streams, Nepal, M62, K52, Helan 16 (NMW.C.2007.006.M62, NMW.C.2007.006.K52, NMW.C.2007.006.He16). 239–248. Foveran Burn, Mill of Newburgh, Scotland (NMW.C.2011.050.SEPA.1810037). 249–258. Achnanthes nana F.Meister (F. Meister collection, #2432), Riffelsee, Switzerland. Scale bar = 10 μm.
FIGURES 163–170 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 163–170. SEM micrographs with details of the type material of Achnanthes minutissima var. cryptocephala Grunow in Van Heurck (Van Heurck Types du Synopsis 238). 163. Apice of a raphe valve in external view, showing rounded areolae at the extremity and slit-like areolae in the valve margin. 164. Apice of a raphe valve in internal view, with the transapically elongated areolae in the valve margin. 165. Apice of a rapheless valve in external view, with the slit-like areolae in the valve margin and in the mantle. 166. Apice of a rapheless valve in internal view, with the transpically elongated areolae in the valve margin. 167. Central area of a rapheless valve in external view, with elliptical shape and bordered by alternating shorter and longer striae. 168. Central area of a rapheless valve in internal view, with elliptical shape and bordered by shorter striae. 169. Central area of a raphe valve in external view, showing the rectangular fascia and the straight not expanded proximal pores. 170. Central area of a raphe valve in internal view, showing the rectangular fascia and the proximal raphe pores slightly deflected into opposite directions. Scale bars = 1 μm.
FIGURES 395–398 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 395–398. SEM micrographs of Achnanthidium duriense Novais & Ector, sp. nov. from A-do-Bispo, Torto River, Douro basin, 18-08-2007 (129/07). 395. Raphe valve in external view. 396. Raphe valve in internal view. 397. Rapheless valve in external view. 398. Rapheless valve in internal view. Scale bars = 1 μm.
FIGURES 145–152 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 145–152. SEM micrographs with details of the type material of Achnanthes minutissima Kütz. (isotype material, Kützing's Algarum Aquae Dulcis Germanicarum, Decade VIII, no. 75, Kützing 301). 145. Apice of a rapheless valve in girdle view, with the slit-like areolae in the mantle. 146. Apice of a rapheless valve in external view, with the rounded areolae in the apice and transapically elongated areolae in the valve margin. 147. Central area of a rapheless valve in external view. 148. Central area of a rapheless valve in internal view, with the areolae covered by hymenes. 149. Central area of a raphe valve in external view, showing the straight proximal raphe pores. 150. Central area of a raphe valve in a tilted internal view, with the proximal raphe pores slightly deflected in opposite directions. 151. Apice of a raphe valve in external view, with the distal ending slightly deflected. 152. Apice of a rapheless valve in internal view, with the areolae covered by hymenes. Scale bars = 1 μm.
FIGURES 1–6. Haslea wawrikae, type material. 1, 2 in A type study and emended description of Haslea wawrikae (Bacillariophyta)
FIGURES 1–6. Haslea wawrikae, type material. 1, 2. Lectotype, LM. 1. Apex. 2. Centre. 3–6. SEM, exterior views. Centre of valve. Arrow and inset (2× enlargement) show central raphe fissures. 4. View about midway to apex. Lines drawn through saepes (which "shine through") mark offset striae. 5. Apex. Raphe termination slightly dilated and curved, outermost two striae fuse and end in "spur". 6. Hairlike extension of valve. Scale bars: 20 μm (Fig. 1), 10 μ (Fig. 2), 5 μm (Fig. 6), 1 μm (Figs 3–5).
FIGURE 1. A in Remarks on the type material and the identity of the name Trifolium multistriatum W.D.J.Koch (T. vesiculosum aggr., Fabaceae)
FIGURE 1. A) Holotype specimen of Trifolium multistriatum W.D.J.Koch preserved at L (L1997850!); B) Other relevant material at PAD (PADH0051029!).
FIGURES 2–17. Microcostatus aerophilus. 2–6 in Study of the type material of Navicula egregia Hustedt and descriptions of two new aerial Microcostatus (Bacillariophyta) species from Central Europe
FIGURES 2–17. Microcostatus aerophilus. 2–6. LM photographs from Hustedt German material. 7–12. Holotype population from Husów material. 13–15. SEM photographs in external valve view illustrating variation in size, outline and conopea with perforation. 16. External girdle view from Husów. 17. External valve view with clearly visible asymmetrical constricted sternum from Hustedt German material.
FIGURES 18–28. Microcostatus edaphicus. 18–23 in Study of the type material of Navicula egregia Hustedt and descriptions of two new aerial Microcostatus (Bacillariophyta) species from Central Europe
FIGURES 18–28. Microcostatus edaphicus. 18–23. LM photographs of type material from Hustedt Collection. 24–25, 27. SEM photographs of external valve view with characteristic clearly visible elongated pores as continuation of striae. 26, 28. Internal valve view with helictoglossae.
FIGURES 29–56. Microcostatus egregius. 29 in Study of the type material of Navicula egregia Hustedt and descriptions of two new aerial Microcostatus (Bacillariophyta) species from Central Europe
FIGURES 29–56. Microcostatus egregius. 29. Drawing of Navicula egregia Hustedt 1942a. 30–52. LM photographs of Hustedt type material. 53, 55–56. SEM photographs of external valve view illustrating a row of perforation in the place of sternum and conopeum connection. 54. Internal valve view with helictoglossae.
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