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88 results for “Navicula”
FIGURES 6–11. Navicula craticuloides. SEM, external views. 6. Entire valve view. 7 in Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)
FIGURES 6–11. Navicula craticuloides. SEM, external views. 6. Entire valve view. 7. Central portion of the valve showing broadly expanded drop-like. 8. View of the end with prolongation of the raphe slit from a terminal pore to the valve mantle with a clear curve to the secondary side. 9–11. Navicula craticuloides. SEM, internal views. 9. Internal valve view. 10. Central portion of the valve with a twisted raphe rib. 11. Uncorroded intact hymens occlude the areolae and helictoglossa slightly offset from raphe terminates.
FIGURES 34–39. Navicula rumaniensis Hust. 34, 35 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 34–39. Navicula rumaniensis Hust. 34, 35. SEM internal images of the valve from Hustedt Collection—E8338 Rumänien 8, in oblique and straight position. 37, 39. Internal images of small helictoglossae and pseudosepta. 38. External distal raphe fissure deflected, extending as narrow fissures onto the valve apex margins. 37, 38. Hustedt Collection, E8338 Rumänien 8. 39. Valve from Pantocsek Collection. Scale bars: 34, 36 = 20 μm; 37, 39 = 5 μm; 38 = 2 μm.
FIGURES 15–17 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 15–17. SEM external images of Navicula reinhardtii var. gracilior Grunow in Van Heurck. 15. Raphe sternum prominent and elevated through most of the axial area, becoming confluent towards the apices. 16. External proximal raphe ends forked with a distinct silicate tongue, entering the raphe fissure. 17. External distal raphe fissures extending slightly curved to one side and continuing onto the valve apex mantle.
FIGURES 29–33. Navicula rumaniensis Hust. 29 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 29–33. Navicula rumaniensis Hust. 29. Reproduction of the original drawing in Schmidt' Atlas. 30–33. LM photographs of valves from Hustedt Collection and Pantocsek Collection. 30. Slide N17/27 unnamed, marked by Hustedt specimen (slides in Hustedt collection have only his description—Fossils, Rumänien; no slide has the name with N. rumaniensis). 31 a, b. The same valve at different focus from the slide X7/34—mentioned by Simonsen (1987) as with marked specimen—Holotype slide. Scale bar = 10 μm.
FIGURES 50–55 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 50–55. Navicula friedelhinziae Wojtal, Ognjanova-Rumenova, Buczkó & Van de Vijver, sp. nov., SEM, internal images. 51. Details of a central area—raphe slit narrow and straight, running on a thickened, raised sternum. 52, 53. Raphe ends slightly expanded and unilaterally bent and one large poroid located over the helictoglossa. 54, 55. Two apices with corroded poroids showing their ultrastructure. Scale bars: 50 = 10 μm; 51, 52 = 4 μm; 53–55 = 1 μm.
FIGURES 1–14 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 1–14. LM. 1–7. Navicula digitoradiata var. striolata Grunow in Cleve & Grunow. 1. The lectotype of N. digitoradiata var. striolata Grunow in Cleve & Grunow exsiccata n° 25 (collection entry II-2-C1) sampled from Degeberga (Sweden), housed in Van Heurck Collection. 8–14. Navicula reinhardtii var. gracilior Grunow, Types du Synopsis de Belgique nº 80 (collection entry V-25-B8), from from Rouge-Cloître (Belgium), in Van Heurck collection. 13. The lectotype of N. reinhardtii var. gracilior Grunow, slide II-2-C1, housed in Van Heurck Collection. Scale bar = 10 μm.
FIGURES 45–49 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 45–49. Navicula friedelhinziae Wojtal, Ognjanova-Rumenova, Buczkó & Van de Vijver, sp. nov. 45–47. LM images of N. friedelhinziae from Lom basin showing broadly lanceolate valves with obtusely rounded axial area and central area irregular, transversely widened. 45. Holotype from the slide LoB-T4/4274. 48, 49. External valves SEM images showing details of a valve central area. Scale bars: 45–48 = 10 μm; 49 = 5 μm.
FIGURES 40–44. Navicula rumaniensis Hust., SEM. 41–44 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 40–44. Navicula rumaniensis Hust., SEM. 41–44. External view of the frustule in oblique (41) and straight position (42–44) with details of central and apical frustules parts. 40–44. Valves from Pantocsek Collection. Scale bars: 40 = 25 μm; 41, 42 = 20 μm; 43, 44 = 5 μm.
FIGURES 22–28 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 22–28. Navicula striolata (Grunow in Cleve & Grunow) Lange-Bertalot. 24–28. SEM images showing typical characters of the species, i.e. raphe sternum prominent and elevated through most of the axial area; external proximal raphe ends forked with a distinct silicate tongue, entering the raphe fissure; raphe endings terminating on small helictoglossae; raphe ends are straight, located on a small, elevated central nodule. Modern samples collected from various localities in Poland. SEM: Ołudza locality. Scale bars: 24, 25 = 30 μm, 26–28 = 5 μm. LM: scale bar = 10 μm.
FIGURES 18–21 in Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov.
FIGURES 18–21. SEM internal images of Navicula reinhardtii var. gracilior Grunow in Van Heurck. 18–20. Very narrow, straight raphe slit. 20. Raphe ends are straight, located on a small, elevated central nodule. 21. Raphe endings terminating on small helictoglossae. At the valve apex, one large pore is visible.
FIGURES 65–70 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 65–70. Navicula walkeri, SEM. Snow Creek, Oregon. 65–67. External valve views. 68–70. Internal valve views. Scale bars: Figs 65, 68 = 10 μm; all others = 5 μm.
FIGURES 47–52 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 47–52. Navicula subwalkeri, SEM, North Umpqua River, Oregon. 47–49. External valve views. 50–52. Internal valve views. Scale bars: Figs 47, 50 = 10 μm; all others = 2 μm.
FIGURES 18–29 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 18–29. Navicula ludloviana, LM. 18. Iconotype, A. Schmidt 1876. 19–22. Specimens from fossil lacustrine population near Port Ludlow, Washington (ANSP! Boyer 1060). 23, 24. Specimens from fossil lacustrine populations near Pit River, California. 23. ANSP! Boyer E-2-21. 24. ANSP! Febiger 5661. 25–29. Specimens from extant riverine populations in Oregon. 25–27, 29: Snow Creek, Oregon. 28: Lake Creek, Oregon. Scale bars = 10 μm for all images.
FIGURES 30–33 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 30–33. Navicula ludloviana, SEM. Specimens from fossil lacustrine population near Pit River, California (ANSP! Boyer 338). 30, 31. External valve views. 32, 33. Internal valve views. Scale bars: Figs 30, 32, 33 = 10 μm; Fig. 31 = 2 μm.
FIGURES 53–64 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 53–64. Navicula walkeri, LM. 60. Close-up of central area of valve in 63. 61, 62. Iconotypes, Sovereign 1958. 63, 64. Same valve at different levels of focus. 53. North Umpqua River, Oregon. 54, 55, 57–59. Snow Creek, Oregon. 56. Pit River diatomite, California (ANSP! Boyer 338). 60, 63, 64. Lake Creek, Oregon.
FIGURES 11–17 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 11–17. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 13–17. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm.
FIGURE 1 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURE 1. Map of the northwestern United States showing approximate locations of sampling sites listed in Table 1 and mentioned in the text. Key to states: CA = California, ID = Idaho, MT = Montana, NV = Nevada, OR = Oregon, WA = Washington. Key to sites: C = Chiloquin, CL = Crater Lake, CR = Columbia River, DL = Diamond Lake, JC = Jackson Creek, LC = Lake Creek, LW = Lake Washington, M = Merced River, NUR = North Umpqua River, PL = Port Ludlow, PR = Pit River, QC = Quartzville Creek, SNC = Snow Creek, SC = Spring Creek, T = Terrebonne, UCR = upper Clearwater River, UKL = Upper Klamath Lake.
FIGURES 2–10 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 2–10. Navicula volcanica, LM. 3. Preserved specimen with intact chloroplasts and four large oil droplets. 5. Holotype specimen. 2, 4, 6–10. Clearwater River, Oregon. 3, 5. North Umpqua River, Oregon. Scale bars = 10 μm.
FIGURES 34–46 in Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest
FIGURES 34–46. Navicula subwalkeri, LM. 34. Holotype specimen. 42. Close-up of central area. 45, 46. Preserved specimens with intact but somewhat degraded chloroplasts. 34, 37, 41, 45, 46. North Umpqua River, Oregon. 35, 36, 38–40, 42, 44. Clearwater River, Oregon. 43. Pliocene diatomite, Chiloquin, Oregon (ANSP! GC63230). Scale bars: Fig. 42 = 5 μm; all others = 10 μm.
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.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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