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Dataset results
132 results for “Freshwater diatoms”
FIGURE 1 in Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
FIGURE 1. Sampling sites (black triangle) in Great East region (France) where Encyonema bonapartei has been recorded, with the location of type locality (black star).
FIGURES 2–17 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURES 2–17. Sellaphora davoutiana (type material from Lispach Lake at La Bresse). Figs 2–13. LM valve views. Holotype depicted on Fig. 5. Scale bar = 10 μm. Figs 14–17. SEM views. 14. Valve in external view. 15. Valve in internal view. 16. Close up on apex showing distal raphe fissure ending in helictoglossae. 17. Valve in external view showing distal raphe ending on the mantle. Scale bars = 2 μm.
FIGURE 1 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURE 1. Sampling sites (black triangle) in Grand Est region (France) where Sellaphora davoutiana has been recorded, with the location of type locality (black star).
FIGURES 18–33 in Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
FIGURES 18–33. Adlafia detenta comb. nov. (Hustedt Collection, Lectotype E1330, Davos, Schweiz 230, Unterer Grialetschsee, Grund, 2.10.1932). Figs 18–30. LM views. Original drawing from Hustedt in Schmidt et al. (1934, pl. 400, figs 93–95) here reproduced as Figs 18–20. Scale bar = 10 μm. Figs 31–33. SEM views. 31–32. Valve in external view. 33. Close up on apex showing distal raphe fissure ending. Note the typical stria divergence of the genus Adlafia (arrow). Scale bars = 2 μm.
FIGURES 21–32 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURES 21–32. Fallacia californica Stancheva & Manoylov, sp. nov. type material from Aliso Creek, California, USA and from Soquel Creek (Figs 26–28). Figs 21–26 internal valve view. Figs 27–32 external valve view. Arrowheads show the gap between central striae. SEM images, scale bars 1 μm.
FIGURES 2–20 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURES 2–20. Fallacia californica Stancheva & Manoylov, sp. nov. Figs. 2–15, type material from Aliso Creek, California, USA (site 901M14126), Fig. 9 girdle view. Figs 16–20 from Soquel Creek (site 304PS0338). Note the distinct panduriform lyre sternum (Figs 2–4, 15); the hyaline rib, which is enlarged to fan-shaped near the valve center (Figs 2, 7,10,18) and enlarged central area on the opposite side (Figs 2, 5, 10, 18). LM images, scale bar 10 μm.
FIGURE 1 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURE 1. SEM image of Fallacia californica Stancheva & Manoylov, sp. nov. with indication of main structural elements of the valve as follow: stars—lyre-shaped sternum; dots—hyaline rib interrupting the striae; arrows—areolae adjacent to the raphe branches; diamonds—inner areolae; arrowheads—areolae near the mantle. Scale bar 1 μm.
FIGURES 39–46 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURES 39–46. Fallacia tenera (Hust.) D. G. Mann. Fig. 39 specimen from Aliso Creek, Orange County, California. Figs 40–42 specimens from Tuolumne River, Central Valley, Stanislaus County, California. Figs 43–46 specimens from Ranu Klindungan Lake, Java, Hustedt`s slide N8/50 Navicula tenera, R. S. Java, Ranu Klindungan Lake 1, 1930. LM images, scale bar 10 μm.
FIGURES 33–38 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURES 33–38. Fallacia californica Stancheva & Manoylov, sp. nov. type material from Aliso Creek, California, USA and from Soquel Creek (Figs 34, 37). Figs 33, 35 internal valve view. Figs 34, 36–38 external valve view. Fig. 33 shows areolae with remnants from thin hymens. Figs 34, 37 eroded valves with degraded conopeum show the canal of lyre-shaped sternum. Fig. 35 internal valve showing distinctly depressed lyre-shaped sternum. Fig. 36 finger-like protrusions, each with two to four "pegs", which fasten the connection of the conopeum and the mantle. Fig. 38 shows girdle band. SEM images, scale bars 1 μm.
FIGURES 157–167 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 157–167: Pinnularia valdecontroversa sp. nov. LM images. Figs 157–163, 165–167: valve views, size diminution series, Fig. 164: frustule in girdle view. Fig. 160 is of the holotype. Scale bar = 10 μm.
FIGURES 34–39 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 34–39: Luticola galapagoensis sp. nov. SEM images. External valve views. Note the presence of narrow, straight axial area, expanded at the centre to form a wide, rectangular fascia extended out to nearly the margin, with 3–4 areolae on either side at the margin, and on one side with additional opening of stigma foramen (arrow in Fig. 39). Striae comprised of 3–6 rectangular or dash-like areolae. Note the external central raphe endings bent towards valve primary side (arrows in Fig. 37).
FIGURES 84–87 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 84–87: Frustulia galapagosaxonica sp. nov. SEM internal valve views. Fig. 84: the entire valve with axial ribs runing alongside the raphe slits. Note the presence of the double helictoglossa at the central nodule. Figs 85–87: apical parts of valves with porta-crayon-like protracted helictoglossae (arrow in Fig. 86).
FIGURES 168–173 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 168–173: Pinnularia valdecontroversa sp. nov. SEM external views. Fig. 168: raphe fissure slightly wavy (arrow), proximal ends weakly expanded (arrowhead). Figs 169, 171-173: terminal raphe fissure indistinctly curved and sickle-shaped (arrow in Fig.169). Fig. 170: frustule in girdle view. Note the terminal raphe end (arrow). Fig. 171: discontinuity between subdistal and circumpolar striae resulting in a gap (arrow). Note the presence in external view of the open alveola covered with porous membranes (arrow in Fig.173).
FIGURES 149–156 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 149–156: Eunotia feremiserabilis sp. nov. SEM images. Figs 149–153: external valve views. Note the raphe branches on the valve face but not extending to the dorsal margin (arrows in Fig. 149). Striae narrow, alternate with much broader virgae (arrow in Fig. 151). Figs 154–156: internal valve views. Distal raphe ends terminate in helictoglossae (arrow in Fig. 156).
FIGURES 2–33 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 2–33: Luticola galapagoensis sp. nov. LM images. Valve views, showing variation in size and outline. Fig. 27 is of the holotype. Figs 2–20: with DIC, differential interference contrast, remaining bright field. Scale bar = 10 μm.
FIGURES 51–64 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 51–64: Luticola darwinii sp. nov. Figs 51–60: LM images. Valve views, showing size diminution series. Fig. 54 is of the holotype. Figs 51, 55, 57–59: with DIC, differential interference contrast, remaining bright field. Scale bar = 10 μm for LM figures. Figs 61–64: SEM external valve views. Figs 61, 62: narrow axial area expanded at the centre to form a wide rectangular fascia, extended to the valve margins, with 4–5 striae on either side. Fig. 63: radiate striae with irregularly spaced areolae. Proximal raphe ends strongly bent towards the valve primary side (arrows), distal raphe ends strongly hooked into one side. Fig. 64: note the punctiform stigma, clearly set off from the shortened marginal striae (arrow).
FIGURES 121–148 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 121–148: Eunotia feremiserabilis sp. nov. LM images. Figs 121–136, 142–148: valve views, size diminution series, Figs 137– 141: frustules in girdle view. Fig. 127 is of the holotype. Figs 138–141, 144–146: with DIC, differential interference contrast, remaining bright field. Scale bar = 10 μm.
FIGURES 78–83 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 78–83: Frustulia galapagosaxonica sp. nov. SEM external valve views. Figs 78, 79: axial area of the whole valve, with straight outer raphe slit. Figs 80–82: T-shaped proximal (Fig. 81–arrow) and distal (Fig. 81–arrowhead) raphe ends. Fig. 83: Transapical striae composed of apically aligned areolae. Note small terminal nodule area above the T-shaped distal raphe end (arrow) terminating below the pole.
FIGURES 44–50 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 44–50: Luticola galapagoensis sp. nov. SEM images. Internal valve views. Figs 44, 45, 48, 49 (arrows): note the opening of stigma bordered by a hemispherical lipped structure. Fig. 46: close up of the valve interior showing the hymenate occlusions of areolae (arrowhead). Figs 46, 47, 50: note the longitudinal canal near the margin of valve, protruding into the valve interior. Arrow in Fig. 50 points to an opening of the canal. Figs 49, 50: FIB cut of the valve.
FIGURES 40–43 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURES 40–43: Luticola galapagoensis sp. nov. SEM images. External valve views. Fig. 40: a single areola per stria positioned along the valve mantle (arrow). Fig. 41: elongated stigma foramen, different from the striae forming areolae (arrow). Figs 42, 43: FIB cut of the frustule, Fig. 42: position of the hymenate areola occlusions (arrow). Fig. 43: note the longitudinal canal (arrow).
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International Brain Laboratory public data
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