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32 results for “Encyonema”
FIG. 5 in Encyonema keshrii, sp. nov.: a new diatom species (Cymbellales, Bacillariophyceae) from the Indian subcontinent
FIG. 5. — Light microscopy of Encyonema keshrii, sp. nov., represented from the Sharavathi River sample: A-M, valve views showing the size diminution series; N, girdle view. Scale bar: A-N, 10 µm.
FIG. 4 in Encyonema keshrii, sp. nov.: a new diatom species (Cymbellales, Bacillariophyceae) from the Indian subcontinent
FIG. 4. — Scanning electron micrographs of girdle view of Encyonema keshrii, sp. nov.: A, dorsal side; B, ventral side of whole valve, showing mantle areolae and girdle bands; C, valve apex covered with girdle bands and transapical areolae present on the valve mantle; D, central area showing the mantle areolae, ribbed valve margin and layers of girdle bands. Scale bars: A-D, 1 μm.
FIG. 3 in Encyonema keshrii, sp. nov.: a new diatom species (Cymbellales, Bacillariophyceae) from the Indian subcontinent
FIG. 3. — Scanning electron micrographs of valve interior of Encyonema keshrii, sp. nov.: A, B, whole valve view, with raphe and striation pattern; C, E valve apices, with small helictoglossae; D, central area, showing proximal raphe ends. Scale bars: A, B, 5 μm; C-E, 1 μm.
FIG. 2 in Encyonema keshrii, sp. nov.: a new diatom species (Cymbellales, Bacillariophyceae) from the Indian subcontinent
FIG. 2. — Scanning electron micrographs of valve exterior of Encyonema keshrii, sp. nov.: A, B, whole valve showing slightly dorsiventral, lanceolate to linearlanceolate valves, raphe and striation pattern; C, showing unique lineolate areolus; D, F, details of marginal and apical pole showing distal raphe ends, mantle poroids; E, middle portion of the valve showing proximal raphe ends. Scale bars: A, B, 5 µm; C, 0.25 µm; D-F, 1 µm.
FIG. 6 in Encyonema keshrii, sp. nov.: a new diatom species (Cymbellales, Bacillariophyceae) from the Indian subcontinent
FIG. 6. — Scanning electron micrographs of Encyonema keshrii, sp. nov., represented from the Sharavathi River sample: A-C, valve exterior ultrastructures; D-F, valve interior ultrastructures. Scale bars: A-F, 1 μm.
FIGURES 17–24 in New species of the genus Encyonema (Cymbellales, Bacillariophyta) from the Descoberto River Basin, Central-western Brazil
FIGURES 17–24. Encyonema candangense sp. nov. 17–21. Valve view, LM. 22, 23. External valve view, SEM. 24. Broken frustule, showing external and internal valve surfaces and the arrangement of alveolae of the hypovalve. Scale bars: Figs 17–21 = 10 μm; Figs 22, 23 = 2 μm; Figs 24 = 1μm.
FIGURES 2–16 in New species of the genus Encyonema (Cymbellales, Bacillariophyta) from the Descoberto River Basin, Central-western Brazil
FIGURES 2–16. Encyonema menezesiae sp. nov. 2–8. Valve view, LM. 9–12. External valve view, SEM. 13, 14. Ends in external valvar view, SEM, showing hooked external terminal fissure of the raphe. 15, 16. Internal valvar view in SEM. Scale bars: Figs 2–8 = 10 μm; Figs 9–12, 15, 16 = 2 μm; Figs 13, 14 = 1μm.
FIGURES 24–29 in Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
FIGURES 24–29. Encyonema bonapartei SEM views (type material from Sampigny). 24. Valve in external view. 25. Valve in internal view. 26. Close up on proximal raphe endings in external view. 27. Close-up of proximal raphe endings in internal view. 28. Close-up of apex in external view. 29. Close-up of apex in internal view showing distal raphe fissure ending in helictoglossae. Scale bars = 2 μm.
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 62–65 in Resolving the confusion between two fossil freshwater diatoms from Otago, New Zealand: Encyonema jordanii and Encyonema jordaniforme (Cymbellaceae, Bacillariophyta)
FIGURES 62–65. Scanning electron micrographs from sample AT82 (Encyonema jordani, Otago, New Zealand, Weissflog Collection, Jordan, 4/1882) present in the Hustedt Collection in Bremerhaven (Germany). 62. External view of an entire valve. 63. External view of the valve apex showing the terminal raphe fissure. 64. Internal view of an entire valve showing the helictoglossa and the deflected proximal raphe endings. 65. Internal view of the central area showing the intermissio and the square-shaped areolae. Scale bar represent 10 μm in figs 62, 64 and 1 μm for figs 63, 65.
FIGURES 25–61. E. jordanii. 25–43 in Resolving the confusion between two fossil freshwater diatoms from Otago, New Zealand: Encyonema jordanii and Encyonema jordaniforme (Cymbellaceae, Bacillariophyta)
FIGURES 25–61. E. jordanii. 25–43. Light micrographs from sample AT82 (Encyonema jordani, Otago, New Zealand, Weissflog Collection, Jordan, 4/1882) present in the Hustedt Collection in Bremerhaven (Germany). 44–61. Light micrographs from sample Slide VIII-2-B1 (Van Heurck Collection, Botanic Garden Meise, Belgium). Scale bar represents 10 μm.
FIGURES 85–89 in Resolving the confusion between two fossil freshwater diatoms from Otago, New Zealand: Encyonema jordanii and Encyonema jordaniforme (Cymbellaceae, Bacillariophyta)
FIGURES 85–89. Scanning electron micrographs of E. jordaniforme from Foulden Maar. 85. External view of an entire valve. 86. External view of the central area showing small rounded areolae and almost straight proximal raphe endings. 87. External view of a valve apex showing the terminal raphe fissure. 88. Internal view of an entire valve. 89. Internal view of the central area showing the deflected proximal raphe endings with a broad intermissio. Scale bar represent 10 μm for figs 85, 88 and 1 μm for figs 86, 87, 89.
FIGURES 1–24. 1–2. P. T in Resolving the confusion between two fossil freshwater diatoms from Otago, New Zealand: Encyonema jordanii and Encyonema jordaniforme (Cymbellaceae, Bacillariophyta)
FIGURES 1–24. 1–2. P. T. Cleve's original figures of Encyonema jordanii. 3–10. E. jordanii from Hustedt in A.Schmidt Atlas plate 379. 11–16. E. jordanii sensu Foged 1979, Krammer's type for E. jordaniforme. 17. Foged's sample phial 508 photographed by Nina Lindholm. 18–24. Raeside's figures of Cymbella jordanii. Scale bars represent 10 μm.
FIGURES 66–84 in Resolving the confusion between two fossil freshwater diatoms from Otago, New Zealand: Encyonema jordanii and Encyonema jordaniforme (Cymbellaceae, Bacillariophyta)
FIGURES 66–84. Light micrographs of E. jordaniforme from Foulden Maar (sample 7 U. K.). Scale bar represents 10 μm.
FIGURES 1–10 in Encyonema oblonga (Bacillariophyta, Cymbellaceae), a new species from Shanxi Province, China
FIGURES 1–10. Encyonema oblonga sp. nov. LM. Size diminution series of specimens from the holotype slide. Valve views. Scale bar = 10 µm. FIGURES 11–13. Encyonema oblonga, sp. nov. SEM. External views. Fig. 11. Whole valve, showing slit-like areolae without occlusions extending from valve face onto the mantle. Raphe is arched, with dilated proximal ends deflected dorsally, and distal ends hooking onto the ventral margin. Fig. 12. Apex, showing hooked nature of the distal raphe end. Fig. 13. Central area of the valve with dilated proximal raphe ends terminating close to one another.
FIGURES 3–20 in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURES 3–20: Figures 3–16, Encyonema hamsherae sp. nov. Figures 17–20. Encyonema hebridicum. Figs 3 (holotype), 4, 7, 8, 10–13. Shovel Creek, Montana; Figs 5, 9. Castle Creek (Stillwater), Montana; Fig. 6. Tongue River, Wyoming; Figs 14–16. Trout Creek, Montana; Figs 17, 18. Kootenai Fen, Glacier National Park, Montana (MDC sample # 451707 (1), University of Montana Herbarium (MONTU) accession #39–85); Figs 19, 20. (isotype) Lulea Lappmark, Sweden (Cleve and Möller Nr. 37), Fig. 20 shows two focal planes of same valve. Scale bars are 10 µm unless otherwise noted.
FIGURE 2b in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 2b:Dorsal and ventral striae densities of these sample populations, range for E. hebridicum (Krammer, 1997) is illustrated by the line in the lower left of the graph.
FIGURE 2a in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 2a:Length and width measurements of different populations of E. hamsherae sp. nov. from Montana and Wyoming, the range for E. hebridicum given by Krammer (1997) is shown by the rounded box.
FIGURE 1 in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 1: Sites in Montana and Wyoming where Encyonema hamsherae has been recorded. Numbers for each site correspond to those in Table 1. Circle size is proportional to number of E. hamsherae valves recorded in an 800 valve count; please refer to Table 1 for abundance data for each site. Only those sites with associated physical and water chemistry data are listed in Table 2.
FIGURES 3–10 in Encyonema droseraphilum sp. nov. (Bacillariophyta) and other rare diatoms from undisturbed floating-mat fens in the northern Rocky Mountains, USA
FIGURES 3–10: Encyonema droseraphilum sp. nov. Figs 3–8: LM, size diminution series from the type locality. Fig. 4: Holotype specimen. Fig. 9: SEM, external valve view. Fig. 10: SEM, internal valve view. Arrows indicate dorsally bent (not curved) proximal
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