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35 results for “Stauroneis”
FIGURES 9–14. Stauroneis lacuspowaiensis Wadmare & B in Revisiting two Stauroneis Ehrenberg (Bacillariophyta) from H. P. Gandhi's Diatom collection: Notes on Ultrastructure, Types and Nomenclature
FIGURES 9–14. Stauroneis lacuspowaiensis Wadmare & B.Karthick nom. nov., stat. nov., SEM, external valve views. 9, 10. External views of an entire valve. 11, 13. Terminal raphe fissures continuing on mantle. 12. Stauros with straight central raphe ends. 14. Irregularly placed areolae (double arrowheads). Scale bars = 4 µm (Figs 9, 10, 12); 1 µm (Figs 11, 13, 14).
FIGURES 32–36. Stauroneis dharwarensis Wadmare & B in Revisiting two Stauroneis Ehrenberg (Bacillariophyta) from H. P. Gandhi's Diatom collection: Notes on Ultrastructure, Types and Nomenclature
FIGURES 32–36. Stauroneis dharwarensis Wadmare & B.Karthick nom. nov., stat. nov., SEM, external valve views. 32, 36. External views of an entire valve. 33. Stauros with tear-drop central raphe ends. 34, 35. Deflected terminal raphe fissures. Scale bars = 4 µm (Figs 32–36).
FIGURES 1–8. Stauroneis lacuspowaiensis Wadmare & B in Revisiting two Stauroneis Ehrenberg (Bacillariophyta) from H. P. Gandhi's Diatom collection: Notes on Ultrastructure, Types and Nomenclature
FIGURES 1–8. Stauroneis lacuspowaiensis Wadmare & B.Karthick nom. nov., stat. nov., 1. Original illustration of Gonzalves & Gandhi (1953: 256, fig. 92). 2–8. Light micrographs (DIC) from the type material (AHMA Sr 5), Fig. 4. represent the lectotype. 4. Irregularly punctate areolae (double arrowheads). 5. Valve with slight undulate sides (arrow). 7. Terminal raphe fissures with bifurcation (arrowhead). Scale bar = 10 µm.
FIGURES 19–31. Stauroneis dharwarensis Wadmare & B in Revisiting two Stauroneis Ehrenberg (Bacillariophyta) from H. P. Gandhi's Diatom collection: Notes on Ultrastructure, Types and Nomenclature
FIGURES 19–31. Stauroneis dharwarensis Wadmare & B.Karthick nom. nov., stat. nov., 19. Original illustration of Gandhi (1959a: 104, 105, Fig. 25). 20–31. Light micrographs (DIC) from the type material (AHMA Sr 48), Fig. 24 represents the lectotype. Scale bar = 10 µm.
FIGURES 15–18. Stauroneis lacuspowaiensis Wadmare & B in Revisiting two Stauroneis Ehrenberg (Bacillariophyta) from H. P. Gandhi's Diatom collection: Notes on Ultrastructure, Types and Nomenclature
FIGURES 15–18. Stauroneis lacuspowaiensis Wadmare & B.Karthick nom. nov., stat. nov., SEM, internal valve views. 15. Internal view of an entire valve. 15, 17. Elevated stauros possessing tunnel gap (arrowheads). 17. Areolae irregular covered with hymen structures (double arrowheads). 16, 18. Terminal raphe fissures with helictoglossae. Scale bars = 4 µm (Figs 15–18).
FIGURES 11–13 in Stauroneis kingstonii sp. nov. (Bacillariophyta: Naviculales), a new diatom species from the Black Swamp, Arkansas, USA
FIGURES 11–13. SEM images of Stauroneis kingstonii. Fig. 11. Internal view of an entire valve. Scale bar = 10 μm. Fig. 12. Internal valve view showing thickened stauros, longitudinal ribs of raphe sternum, and slightly deflected proximal raphe ends. Scale bar = 10 μm. Fig. 13. Internal valve view showing distal raphe end deflected into a helictoglossum, striae comprising single rows of areolae that are each occluded by a hymene. Scale bar = 5 μm.
FIGURE 10 in Stauroneis kingstonii sp. nov. (Bacillariophyta: Naviculales), a new diatom species from the Black Swamp, Arkansas, USA
FIGURE 10. Raphe features of Stauroneis kingstonii; lateral raphe branch and broad axial area, proximal raphe ends nearly straight, and distal raphe ends sickle-shaped. Scale bar = 10 μm.
FIGURE 1 in Stauroneis kingstonii sp. nov. (Bacillariophyta: Naviculales), a new diatom species from the Black Swamp, Arkansas, USA
FIGURE 1. The Cache River watershed, Arkansas, USA. Station 14 is the Stauroneis kingstonii type locality. Filled circles indicate numbered sampling stations where Stauroneis kingstonii occurred and unfilled circles indicate where valves did not occur in samples.
FIGURES 2–9 in Stauroneis kingstonii sp. nov. (Bacillariophyta: Naviculales), a new diatom species from the Black Swamp, Arkansas, USA
FIGURES 2–9. Size diminution series of Stauroneis kingstonii, LM, DIC. Fig. 3. Holotype specimen (ANSP GC-65192). All images in valve view and at same scale; scale bar (Fig. 2) = 10 μm.
FIGURES 1–24. 1. Stauroneis apiculata. 2, 3. Cocconeis apiculata. 4 in Achnanthes citronella, A. trachyderma comb. nov. (Bacillariophyta) and allied taxa pertaining to the same morphological group
FIGURES 1–24. 1. Stauroneis apiculata. 2, 3. Cocconeis apiculata. 4. Stauroneis(?) obesa. 5. Cocconeis robusta. 6. Rhaphoneis mammalis. 7–9. Achnanthes mammalis. 10. Achnanthes mammalis var. reticulata according to Foged (see text, reproduced with permission of E. Schweizerbart). 11. Achnanthes (Actinoneis) mammalis var. reticulata. 12. Unnamed individual in Schmidt et al. (1895, pl. 198, fig. 40). 13, 14. Cocconeis citrina. 15–17. Cocconeis citronella. 18. Cocconeis sabangi. 19, 20. Cocconeis trachyderma. 21, 22. Achnanthes schmidtii. 23, 24 Achnanthes schmidtii (reproduced with permission of E. Schweizerbart). Scale bars = 20 μm.
FIGURES 8–13 in Stauroneis fuegiana, a new Stauroneis species (Bacillariophyta) from Tierra del Fuego, southern Argentina
FIGURES 8–13. Stauroneis fuegiana sp. nov. Type population from Rancho Hambre, Tierra del Fuego (sample RH-VP4-SED) (8) SEM external view of an entire valve. (9) SEM external detail of the central area showing the deflected proximal raphe endings. The arrows indicate the marginal crest. (10) External detail of the valve apex showing the terminal raphe fissures. (11) SEM internal view of an entire valve. (12) SEM internal detail of the central area with the well-developed stauros and the proximal raphe endings. (13) Internal detail of the valve apex with a distal raphe endings and the helictoglossa. Scale bars represent 10 μm.
FIGURES 1–7 in Stauroneis fuegiana, a new Stauroneis species (Bacillariophyta) from Tierra del Fuego, southern Argentina
FIGURES 1–7. Stauroneis fuegiana sp. nov. Type population from Rancho Hambre, Tierra del Fuego (sample RH-VP4-SED) (1–5) LM views of an entire valve. The arrows in Fig. 1 indicate the marginal crest on the valve face/mantle junction (6–7) LM views of the central area with the deflected proximal raphe endings. Scale bars represent 10 μm.
FIGURES 42‒47 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 42‒47. Stauroneis karstica Tusset, Tremarin & T. Ludwig sp. nov. SEM. Fig. 42. External view of tilted valve. Figs 43‒44. Detail of striation pattern in the median region of valve, external and internal view, respectively. Fig. 45. Girdle view. Fig. 46. Detail of girdle bands. Fig. 47. Internal view of valve. Scale bars = 5 μm (Figs 42, 45, 47), 2 μm (Figs 43, 44, 46).
FIGURES 36‒41 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 36‒41. Stauroneis karstica Tusset, Tremarin & T. Ludwig sp. nov. Figs 36‒40. SEM. Fig. 41. TEM. Fig. 36. External view of valve. Fig. 37. External view of median region showing the proximal raphe endings and striation pattern. Fig. 38. Internal view of median region of valve showing the stauros and proximal raphe endings. Fig. 39. Tilted valve showing the distal raphe ending extending to the mantle. Fig. 40. Internal view of valve apex, note the helictoglossa and pseudosepta. Fig. 41. Detail of areolae occlusion near the apex. Scale bars = 5 μm (Fig. 36), 2 μm (Figs 39, 40), 1 μm (Figs 37, 38), 0.5 μm (Fig. 41).
FIGURES 23‒35 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 23‒35. Stauroneis karstica Tusset, Tremarin & T. Ludwig sp. nov. LM. Figs 23‒35. Valve views. Figs 28–29. Girdle views. Fig. 23. UPCB 78275 (holotype specimen). Scale bar = 10 μm.
FIGURES 11‒16 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 11‒16. Stauroneis cavalcantei Tremarin, Tusset & T. Ludwig sp. nov. LM. Valve views. Fig. 12. UPCB 78276 (holotype specimen). Scale bar = 10 μm.
FIGURES 5‒10. Stauroneis alabamae Heiden. SEM. Figs 5‒6 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 5‒10. Stauroneis alabamae Heiden. SEM. Figs 5‒6. External and internal valve view, respectively. Fig. 7. External view of central area showing the proximal raphe endings and the striation pattern. Fig. 8. Internal view of central area showing the stauros and the proximal raphe endings. Fig. 9. Girdle view of frustule, note the distal raphe ends and the bands. Fig. 10. Internal view of valve apex showing the helictoglossa. Scale bars = 20 μm (Figs 5, 6, 9), 5 μm (Figs 7, 8), 2 μm. (Fig. 10).
FIGURES 17‒22 in Two new Stauroneis species (Bacillariophyta, Stauroneidaceae) from midwestern karstic Brazilian formations
FIGURES 17‒22. Stauroneis cavalcantei Tremarin, Tusset & T. Ludwig sp. nov. SEM. Figs 17‒18. External and internal valve view, respectively. Figs 19. Internal view of central area showing the stauros and the proximal raphe endings. Fig. 20. External view of central area showing the striation pattern and the proximal raphe endings. Fig. 21. Internal view of valve apex, note the helictoglossa. Fig. 22. External view of valve apex showing the distal raphe endings. Scale bars = 5 μm (Figs 19, 20), 2 μm (Figs 17, 18, 21, 22).
FIGURES 18–25 in Description of Stauroneis saprophila sp. nov. (Bacillariophyta), a new diatom species from anthropogenic environment
FIGURES 18–25. SEM images of Stauroneis saprophila. 18–20 External view of an entire valve. 21. Internal valve view of entire valve. 22. External view of valve apex, with visible girdle band perforations. 23. External view of central area. 24. External view of valve apex with distal raphe end. 25. Internal view of valve apex with clearly visible pseudoseptum. Scale bars: Figs 18–21, 25 = 10 μm, Figs 22–24 = 5 μm.
FIGURES 1–2. Sampling site. 1 in Description of Stauroneis saprophila sp. nov. (Bacillariophyta), a new diatom species from anthropogenic environment
FIGURES 1–2. Sampling site. 1. Place of water outflow from storm sewer. 2. The end section of the water outflow finished by puddle.
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