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6 results for “Caloneis”
FIGURES 29–36 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 29–36. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from syntype material of C. quilinesis. LM. Figs 29–33. Valves linear-elliptic with triundulated margin to linear panduriform, note that distal undulations are wider than central undulation. Figs 30–31. The same specimen in different foci. Idem for figures 32–33. Fig. 34. Tilted frustule showing the hypovalve surrounded by the valvocopula. Figs 35–36. Different foci of a valve. Scale bars: 10 μm.
FIGURES 9–15 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 9–15. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from unmounted syntype material of C. mendosina and C. mendosina var. minor. SEM. Arrowheads show the internal aperture of the alveolate areolae. Fig. 9. Small tilted frustule showing broad fascia, radiate striae and deep mantle shallower near the apices. Fig. 10. Frustule in girdle view. Note girdle bands are missing. Fig. 11. Frustule tilted showing the valve view of the hypovalve. Fig. 12. Frustule tilted showing the epivalve. Note valve surface curved proximal region and vertical distal unperforated region of the mantle. Internal elliptical apertures are located at the junction of the valve face and mantle (arrowheads). Fig. 13. Frustule in girdle view. Note alveolate striae continuing shortly onto the valve mantle. Fig. 14. Frustule tilted showing the hypovalve and the mantle of the epivalve. Note excavated raphe fissures bent toward the margin of the valve in the same direction with terminal raphe fissure. Fig. 15. Detail of the polar region of a frustule in girdle view showing terminal raphe fissure finished near the valve margin (arrows). Scale bar: 10 μm in Figs 9–14; 5 μm in Fig. 15.
FIGURES 16–28 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 16–28. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from syntype material of C. quilinesis. LM. Figs 16–25. Frustules in girdle view, note obliquely reinforced corners. Figs 26–28. Valves in lateral view showing deep mantles. Scale bars: 10 μm.
FIGURES 50–54 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 50–54. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from unmounted syntype material of C. quilinesis. SEM. Figs 50–51. Linear-panduriform valves with apiculate apices in internal view. Note the raphe is continuous at the central area and asymmetrical central nodule. Arrows show pseudosepta in figure 50. Fig. 52. Valve in lateral view showing valve mantle. Note terminal external raphe fissure finishing close to the valve margin (arrowhead). Fig. 53. Detail of the central nodule. Fig. 54. Detail of the apex of the valve in figure 51 showing a small helictoglossa (arrowhead) and a short pseudoseptum (arrow). Scale bar: 10 μm in Figs 50–52; 5 μm in Figs 53, 54.
FIGURES 1–8 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 1–8. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from syntype material of C. mendosina and C. mendosina var. minor. LM. 3, 4, 7, 8, Lectotype slide. Figs 1–5. Frustules in girdle view, note obliquely reinforced corners. Figs 6–8. Valves linearpanduriform in outline. Note broad fascia and radiate striation throughout the valve. Scale bars: 10 μm.
FIGURES 37–49 in A re-investigation of three Frenguelli's Caloneis taxa (Pinnulariaceae, Bacillariophyta) from Argentina
FIGURES 37–49. Caloneis mendosina Frenguelli (emend. Sar & Sunesen) from unmounted syntype material of C. quilinesis. SEM. External views. Arrowheads show terminal raphe fissures and arrows segmental copula. Figs 37–38. Same frustule in connective view and valvar view respectively. Fig. 39. Frustule showing the hypovalve and the epicingulum. Note vertical, unperforated region of the valve mantle of the epivalve, an open valvocopula and a segmental copula, m: mantle, v: valvocopula. Fig. 40. Valve in lateral view showing vertical, unperforated region of the valve mantle, shallower near the apices. Fig. 41. Frustule tilted similar to figure 39. Fig. 42. Frustule in girdle view. Note open valvocopula and segmental copula. Fig. 43. Detail of the figure 39 showing alveolae with outer areolate, multiseriate layer (3–4 poroids rows). Fig. 44. Detail of figure 32 showing central external raphe fissures dug out on the central area, ending in drop-like pores, deflected toward one side of the valve. Fig. 45. Detail of a central area showing alveolate striae of the hypovalve and valvocopula of the epicingulum with a row of elongate poroids. Figs 46–47. Detail of both apices of the valve in figure 39 showing the epicingulum, m: valve mantle, v: open valvocopula, and a segmental copula. Fig. 48. Detail of the polar area of a frustule in figure 41, note external terminal raphe fissure terminates close the valve margin (arrows). Fig. 49. Detail of a polar area of a valve in figure 40 showing the raphe fissure. Note alveolate striae continuing shortly onto the valve mantle. Scale bar: 10 μm in Figs 37–42; 5 μm in Figs 44–47; 2 μm in Figs 43, 48, 49.
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