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Dataset results
21 results for “Haslea”
FIGURES 47−57. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 47−57. H. clevei sp. nov., SEM. figs 47–53. Type material, Finnmark, Norway. figs 54–57. Material from Florida, USA. SEM. Fig. 47. General aspect, exterior, bar = 20 μm. Inset: detail, magnified 4x, showing offset striae. Fig. 48. General aspect, interior, bar = 20 μm. Fig. 49. Centre, interior, bar = 2 μm. Note vestigial central bar. Fig. 50. Centre, exterior, bar = 2 μm. Inset (2x enlargement): central raphe endings in "pits", almost fused. Fig. 51. Apex, exterior, bar = 2 μm. Fig. 52. Apex, interior, bar = 2 μm. Note prominent helictoglossa. Fig. 53. Interior view of valve where basal and tegumental layer have separated, bar = 2 μm. Inset (2x enlargement): saepes with large perforations (arrow) located underneath the transverse basal layer bars. Figs 54, 55. Apex, exterior, 2 different specimens, bars = 1 μm. Valve morphogenesis not yet finished, longitudinal fissures still to be filled in. Arrows mark perforations in saepes. Fig. 56. Centre, exterior of developing valve, longitudinal fissures still to be filled in. Horizontal arrow marks raphe endings in "pits", oblique arrows mark perforations in saepes. Bar = 3 μm. Fig. 57. Centre, interior. Vestigial central bar, compare with Fig. 49 for variability. Bar = 2 μm.
FIGURES 65−68. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 65−68. H. amicorum sp. nov. Fig. 65. Holotype, LM. Bar = 10 μm. Fig. 66. Isotype, SEM, general view. Bar = 5 μm. Fig. 67. Isotype, SEM, exterior view, centre. Note interrupted longitudinal fissures in median portion of valve, continuous fissures towards margin. Bar = 1 μm. Fig. 68. Isotype, exterior view, apex. Arrow marks apical pore. Bar = 1 μm.
FIGURES 58–64. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 58–64. H. avium sp. nov. SEM, isotypes. Fig. 58. General aspect, exterior, bar = 10 μm. Fig. 59. General aspect, interior, bar = 10 μm. Fig. 60. Apex, exterior, bar = 1 μm. Fig. 61. Apex, interior, bar = 1 μm. Figs 62, 63. Centre, exterior showing central raphe endings, bar = 1 μm. Fig. 64. Centre, interior, showing sideways tilted raphe node, bar = 1 μm.
FIGURES 33–38. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 33–38. H.tsukamotoi sp. nov. SEM, isotypes. Fig. 33. Large specimen, general aspect, interior view, bar = 5 μm. Fig. 34. Average specimen, general aspect, exterior view, bar = 10 μm. Fig. 35. Centre, interior, bar = 2 μm. Inset (2x enlargement): note sideways tilted central raphe node. Fig. 36. Centre, exterior, bar = 2 μm. Inset (2x enlargement): detail of crook-shaped raphe endings. Fig. 37. Apex, interior, bar = 2 μm. Note apical pore (arrow). Fig. 38. Apex, exterior, bar = 2 μm. Note apical pore (arrow).
FIGURES 39–46. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 39–46. H. meteorou sp. nov. SEM, isotypes. Fig. 39. General aspect, exterior, bar = 5 μm. Fig. 40. General aspect, interior, bar = 5 μm. Fig. 41. Apex, exterior, bar = 2 μm. Note apical pores (arrow). Valve morphogenesis not yet complete, fissures to be filled in. Fig. 42. Apex, interior, bar = 2 μm. Note apical pores (arrow). Fig. 43. Centre, interior, bar = 2 μm. Fig. 44. Centre, exterior, bar = 2 μm. Fig. 45. Detail of Fig. 43, 2x enlargement. Note sideways tilted central raphe node. Fig. 46. Detail of Fig. 44, 2x enlargement. Note crook-shaped raphe endings.
FIGURES 27–32. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 27–32. H. feriarum sp. nov. SEM, isotypes. Figs 27, 28. General aspect, average and broad specimen. Bars = 10 μm. Fig. 29. Apex, interior, note apical micropores, bar = 2 μm. Inset (2x enlargement): saepes, arrows mark perforations. Fig. 30. Apex, exterior, bar = 2 μm. Fig. 31. Centre, interior, bar = 2 μm. Fig. 32. Centre, exterior, bar = 2 μm.
FIGURES 10–20 in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 10–20. New Haslea species, LM images (DIC). All bars = 10 μm. All except Fig. 11 are stacks of 12–22 separate images. FIGURES 10, 11. H. staurosigmoidea sp. nov. Fig. 10. Holotype, Fig. 11. Isotype, aspect in normal DIC corresponding to what is seen on visual inspection.
FIGURES 21–26. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 21–26. H. staurosigmoidea sp. nov. SEM, isotypes. Fig. 21. General aspect, bar = 5 μm. Fig. 22. Apex, exterior, bar = 2 μm. Fig. 23. Apex, interior, bar = 2 μm. Arrow marks apical pore. Fig. 24. Centre, interior showing pseudostauros, bar = 2 μm. Fig. 25. Centre, exterior, raphe endings deflected to the same side, bar = 1 μm. Fig. 26. Centre, exterior, raphe endings oppositely deflected, bar = 1 μm.
FIGURES 1–9 in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 1–9. Haslea nipkowii (Meister) Poulin & Massé. Fig. 1–3. General aspect, bars = 20 μm. Fig. 4. Apex, exterior, bar = 2 μm. Note bifurcated raphe ending. Fig. 5. Apex, interior, bar = 2 μm. Note apical microforamina. Fig. 6. Centre, interior, bar = 2 μm. Conspicuous raphe ridge, sharply delineated central bar. Fig. 7. Centre, exterior, bar = 2 μm. Overlapping oppositely deflected raphe endings. Fig. 8. Centre, interior, bar = 2 μm. Conspicuous raphe ridge, different in shape from that of Fig. 6. Fig. 9. Broken valve, bar = 0.5 μm. Basal layer (uppermost) and tegumental layer (lower) joined by upright saepes with small perforations (arrow).
FIGURES 69–81 in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)
FIGURES 69–81. Some central raphe fissure ending shapes in Gyrosigma and Pleurosigma species. No scale bars added, as not relevant in this context. Fig. 69. Gyrosigma attenuatum (Kützing) Cleve. Fig. 70. G. peisonis (Grunow) Hustedt. Fig. 71. G. littorale (W. Smith) Griffith et Henfrey. Fig.72. G. tenuissimum (W.Smith) Griffith & Henfrey. Fig.73. G. obtusatum (Sullivant et Wormley) Boyer. Fig. 74. Pleurosigma aff. normanii Ralfs in Pritchard. Fig. 75. P. elongatum W. Smith. Fig. 76. P. frenguellianum Sunesen, Sterrenburg & Sar. Fig. 77. P. perlucidum Sar, Sterrenburg & Sunesen. Fig. 78. P. patagonicum (Ferrario & Sar) Sterrenburg & Sar. Fig. 79. P. indicum Simonsen. Figs 80, 81. Different shapes seen in a single slide of P. aff. normanii Ralfs in Pritchard.
FIGURE 12 in A type study and emended description of Haslea wawrikae (Bacillariophyta)
FIGURE 12: copy of drawing by Saunders & Glenn (1969) of specimen erroneously identified as "Navicula" wawrikae. Scale bar = 100 μm.
FIGURES 1–6. Haslea wawrikae, type material. 1, 2 in A type study and emended description of Haslea wawrikae (Bacillariophyta)
FIGURES 1–6. Haslea wawrikae, type material. 1, 2. Lectotype, LM. 1. Apex. 2. Centre. 3–6. SEM, exterior views. Centre of valve. Arrow and inset (2× enlargement) show central raphe fissures. 4. View about midway to apex. Lines drawn through saepes (which "shine through") mark offset striae. 5. Apex. Raphe termination slightly dilated and curved, outermost two striae fuse and end in "spur". 6. Hairlike extension of valve. Scale bars: 20 μm (Fig. 1), 10 μ (Fig. 2), 5 μm (Fig. 6), 1 μm (Figs 3–5).
FIGURES 7–11 in A type study and emended description of Haslea wawrikae (Bacillariophyta)
FIGURES 7–11: Haslea wawrikae, Indian River Lagoon, Florida, USA. SEM. 7. Survey. 8. Apices, interior and exterior views. Note fully developed raphe, inconspicuous helictoglossa, fused outermost longitudinal fissures ending in "spur" as in type material specimen of Fig. 5. 9. Interior view of centre. Note fully developed raphe, absence of central raphe nodule, central bars, raphe ridge and accessory ridge, and offset striae. 10. Interior view, apex. Note rudimentary raphe ridge, not sideways tilted. 11. Exterior view. Arrow marks where individual columns of saepes "shine through". Scale bars equal 1 μm, except Fig. 7 (10 μm).
FIGURES 29–32 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURES 29–32. SEM images of Haslea crucigeroides var. australis, var. nov. 29. Internal view of a valve centre showing the pseudostauros, the short ridge on a side of the central nodule and the long ridge on the other side. 30. Detail of valve apex in internal view. Note the long ridge covering the raphe until reaching the helictoglossa. 31. Broken valve revealing its two-layer sandwich-type structure; note also its domed shape. 32. Detail of the tegumental and basal layers of the valve (upper and lower side, respectively) joined to each other by saepes (arrow). Basal layer seen on the left of the picture (arrow). Scale bar = 2 μm (Figs 29–31), 0.5 μm (Fig. 32).
FIGURES 22–28 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURES 22–28. SEM images of Haslea crucigeroides var. australis, var. nov. 22. Part of a frustule in girdle view. Note the external tegumental layer with continuous longitudinal fissures, except on the valve margin (white arrows). The cingulum presents the valvocopula and a copula (black arrows). 23. Valve in external view showing continuous longitudinal fissures, raphe sternum and small central area with the raphe fissures. 24, 25. Apices of the same valve showing the terminal raphe fissures strongly deflected to the same side. 26. Entire valve in internal view. 27. Details of the transverse and longitudinal striae in internal view. Note the rectangular areolar foramina at the valve margin. 28. Detail of the foramina occluded internally by hymenes. Scale bar = 10 μm (Figs 22, 26), 2 μm (Figs 23–25, 27, 28).
FIGURES 5–18 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURES 5–18. LM images of different valves of Haslea crucigeroides var. australis, var. nov. ordered from lowest to highest length of their apical axis, exemplifying different shapes and sizes. 5. Holotype. Black scale bar = 20 μm. FIGURES 19–21. LM images of the holotype specimen of Haslea crucigeroides (Hustedt) Simonsen. White scale bar = 10 μm (Figs 19, 21). Black scale bar = 20 μm (Fig. 20)
FIGURE 1 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURE 1. Maps showing the study area and the three sampling stations (BD, BE, BF) in Almirante Brown Bay, Beagle Channel, Tierra del Fuego, Argentina.
FIGURES 2–4 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURES 2–4. LM images of Haslea crucigeroides var. australis, var. nov. 2, 3. Whole cells in valve and girdle view showing the two chloroplasts. 4. Clean frustule in girdle view showing the dome-shaped valves and copulae. Scale bars = 20 μm.
FIGURES 24–35 in Haslea sigma (Naviculaceae, Bacillariophyta) a new sigmoid benthic species from salt marshes of Southern Brazil
FIGURES 24–35. SEM: Haslea sigma sp. nov. Figs. 24, 26–28, 32, 33. External view. Fig. 24. General view showing the outline of the valve. Fig. 26. Detail of two slits forming a wedge-like structure and detail of slightly curved terminal raphe. Fig. 27. Apice of valve showing the valve surface with straight, parallel and longitudinal strips (black arrow) separated by narrow slits (white arrow). Fig. 28. Detail of open valve showing cingulum composed by valvocopula (black arrow) and one copula (white arrow). Figs. 25, 29–31, 34, 35. Internal view. Fig. 25. General view showing the outline of the valve. Fig. 29. Valve center presenting raphe ending (black arrow), and a pseudostauros formed on primary side (ps) by one thickened virga (black arrow-head) and on secondary side (ss) by two thickened virgae (white arrow-head). Fig. 30. Center of valve showing on primary side part of accessory rib (black arrow), on secondary side the short accessory rib (white arrow) and the pseudostauros (black arrow-head). Fig. 31. Center of valve with pseudostauros, note that on primary and secondary sides the pseudostauros is formed by only one thickened virga. Figs. 32, 33. Longitudinal strips and slits, and central raphe fissures drop-like, bent to primary side. Figs. 34, 35. Apices showing helictoglossa (black arrow), quadrate areolae (white arrow) and end of accessory rib (arrow-head) on the primary side. Scale bars = 10 μm (Figs. 24, 25), 5 μm (Fig. 30), 2 μm (Fig. 27), 1 μm (Figs. 28, 29, 31–34), 0.5 μm (Figs. 26, 35).
FIGURE 1 in Haslea sigma (Naviculaceae, Bacillariophyta) a new sigmoid benthic species from salt marshes of Southern Brazil
FIGURE 1. Location of Pólvora Island (PI) in salt marshes at Patos Lagoon estuary, Southern Brazil. Modified from COSTA (1998).
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