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8 results for “tricolpate”
Text-fig. 53. Scanning electron microscope (SEM) images of tricolpate pollen of Nicholsia brevicolpites gen. et sp. nov. from a coprolite containing several kinds of pollen; Torres Vedras locality, Portugal. a) Detail of the coprolite that yielded the tricolpate pollen in this Text-figure showing several different kinds of pollen grains; b–d) Tricolpate pollen grains in polar (b) and equatorial (c, d) views showing colpi, coarsely granular aperture membrane and foveolate tectum. Specimen, TV44-S137906-03 (holotype; a–d). Scale bars 30 Μm (a), 6 Μm (b–d). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 53. Scanning electron microscope (SEM) images of tricolpate pollen of Nicholsia brevicolpites gen. et sp. nov. from a coprolite containing several kinds of pollen; Torres Vedras locality, Portugal. a) Detail of the coprolite that yielded the tricolpate pollen in this Text-figure showing several different kinds of pollen grains; b–d) Tricolpate pollen grains in polar (b) and equatorial (c, d) views showing colpi, coarsely granular aperture membrane and foveolate tectum. Specimen, TV44-S137906-03 (holotype; a–d). Scale bars 30 Μm (a), 6 Μm (b–d).
Text-fig. 52. Scanning electron microscope (SEM) images of tricolpate pollen of Samylinaea punctata gen. et sp. nov from a pollen clump; Torres Vedras locality, Portugal. a) Pollen clump (probable stamen fragment) that yielded the pollen in this Text-figure; b) Polar view of pollen grain showing two colpi, granular aperture membrane, and punctate tectum; c) Orbicule showing very finely granular surface; d) Pollen wall showing short columellae, well-developed punctate tectum and slightly thinner foot layer; e–h) Pollen grains showing punctate tectum and the folds associated with the irregular development of the colpi. Specimen, TV44-S174565 (holotype; a–h). Scale bars 300 Μm (a), 6 Μm (b, e–h), 3 Μm (c, d). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 52. Scanning electron microscope (SEM) images of tricolpate pollen of Samylinaea punctata gen. et sp. nov from a pollen clump; Torres Vedras locality, Portugal. a) Pollen clump (probable stamen fragment) that yielded the pollen in this Text-figure; b) Polar view of pollen grain showing two colpi, granular aperture membrane, and punctate tectum; c) Orbicule showing very finely granular surface; d) Pollen wall showing short columellae, well-developed punctate tectum and slightly thinner foot layer; e–h) Pollen grains showing punctate tectum and the folds associated with the irregular development of the colpi. Specimen, TV44-S174565 (holotype; a–h). Scale bars 300 Μm (a), 6 Μm (b, e–h), 3 Μm (c, d).
Text-fig. 51. Scanning electron microscope (SEM) images of tricolpate pollen of Mcdougallia irregularis gen. et sp. nov. from a stamen fragment; Torres Vedras locality, Portugal. a) Holotype; stamen fragment that yielded the pollen in this Text-figure; b) Polar view of tricolpate pollen grain showing the continuous psilate tectum in the apocolpium and the poorly developed discontinuous foveolate-reticulate tectum in the mesocolpial areas, note irregular fold in tectum wall (arrowhead); c) Equatorial view of pollen grain showing the discontinuous tectum in the mesocolpial areas; d) Pollen grains showing variably developed tectum, colpi with a finely granular aperture membrane and the folds (arrowheads) associated with the irregular development of the colpi; e) Orbicule showing faintly striate surface; f) Pollen wall showing very short columellae, thin tectum and thin foot layer. Specimen, TV44-S148215 (holotype). Scale bars 300 Μm (a), 6 Μm (b–d), 3 Μm (e, f). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 51. Scanning electron microscope (SEM) images of tricolpate pollen of Mcdougallia irregularis gen. et sp. nov. from a stamen fragment; Torres Vedras locality, Portugal. a) Holotype; stamen fragment that yielded the pollen in this Text-figure; b) Polar view of tricolpate pollen grain showing the continuous psilate tectum in the apocolpium and the poorly developed discontinuous foveolate-reticulate tectum in the mesocolpial areas, note irregular fold in tectum wall (arrowhead); c) Equatorial view of pollen grain showing the discontinuous tectum in the mesocolpial areas; d) Pollen grains showing variably developed tectum, colpi with a finely granular aperture membrane and the folds (arrowheads) associated with the irregular development of the colpi; e) Orbicule showing faintly striate surface; f) Pollen wall showing very short columellae, thin tectum and thin foot layer. Specimen, TV44-S148215 (holotype). Scale bars 300 Μm (a), 6 Μm (b–d), 3 Μm (e, f).
Text-fig. 41. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 5"; Catefica locality, Portugal. a) Pollen clump, probably coprolite but containing one kind of pollen; b, c) Pollen grains from pollen clump in oblique equatorial view (b) and polar view (c) showing the three apertures with a distinct aperture margin and the coarse reticulum; d) Detail of wall of a broken pollen grain showing long straight columellae and a thin foot layer. Specimen, Catefica 50-S115858 (a–d). Scale bars = 600 Μm (a), 6 Μm (b, c), 1.5 Μm (d). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 41. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 5"; Catefica locality, Portugal. a) Pollen clump, probably coprolite but containing one kind of pollen; b, c) Pollen grains from pollen clump in oblique equatorial view (b) and polar view (c) showing the three apertures with a distinct aperture margin and the coarse reticulum; d) Detail of wall of a broken pollen grain showing long straight columellae and a thin foot layer. Specimen, Catefica 50-S115858 (a–d). Scale bars = 600 Μm (a), 6 Μm (b, c), 1.5 Μm (d).
Text-fig. 40. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 4"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment with one kind of pollen grain; b) Detail of pollen clump showing densely packed pollen all of the same kind; c) Pollen grains in equatorial (left) and polar (right) views showing the coarse reticulum in the mesocolpium regions, the striate-reticulate tectum over the polar regions, and the microreticulate to foveolate tectum along the aperture margins; d) Detail of pollen wall showing smooth muri supported by long, densely-spaced columellae; e) Detail of broken pollen wall showing long, densely-spaced columellae detached from the thick foot layer. Specimen, Catefica 50-S170386 (a–e). Scale bars = 600 Μm (a), 20 Μm (b), 6 Μm (c), 1.5 Μm (d, e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 40. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 4"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment with one kind of pollen grain; b) Detail of pollen clump showing densely packed pollen all of the same kind; c) Pollen grains in equatorial (left) and polar (right) views showing the coarse reticulum in the mesocolpium regions, the striate-reticulate tectum over the polar regions, and the microreticulate to foveolate tectum along the aperture margins; d) Detail of pollen wall showing smooth muri supported by long, densely-spaced columellae; e) Detail of broken pollen wall showing long, densely-spaced columellae detached from the thick foot layer. Specimen, Catefica 50-S170386 (a–e). Scale bars = 600 Μm (a), 20 Μm (b), 6 Μm (c), 1.5 Μm (d, e).
Text-fig. 38. Scanning electron microscope (SEM) images of "Stamen with tricolpate pollen sp. 2"; Catefica locality, Portugal. a) Stamen fragment showing the elongate, tetrasporangiate anther but with the base and apex poorly preserved; b, d, e) Pollen grains from stamen fragment in equatorial (b, e) and polar (d) views showing the long colpi with coarsely verrucate aperture membranes and semitectate-microreticulate pollen wall; note small, spherical orbicules scattered on the surface of the tectum (arrows); c) Detail of pollen wall showing smooth muri with very faint transverse striations and a granular to columellate infratectal layer. Specimen, Catefica 153-S105614 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 38. Scanning electron microscope (SEM) images of "Stamen with tricolpate pollen sp. 2"; Catefica locality, Portugal. a) Stamen fragment showing the elongate, tetrasporangiate anther but with the base and apex poorly preserved; b, d, e) Pollen grains from stamen fragment in equatorial (b, e) and polar (d) views showing the long colpi with coarsely verrucate aperture membranes and semitectate-microreticulate pollen wall; note small, spherical orbicules scattered on the surface of the tectum (arrows); c) Detail of pollen wall showing smooth muri with very faint transverse striations and a granular to columellate infratectal layer. Specimen, Catefica 153-S105614 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1 Μm (c).
Text-fig. 37. Scanning electron microscope (SEM) images of "Stamen with tricolpate pollen sp. 1"; Catefica locality, Portugal. a) Stamen fragment showing the elongate, tetrasporangiate anther but with the base and apex poorly preserved; b–d) Pollen grains from stamen fragment in equatorial view showing the long colpi and well-developed, heterobrochate reticulum with very distinct large and small lumina; e) Detail of pollen wall showing orbicules with irregular projections; f) Detail of pollen wall showing smooth muri supported by short, densely spaced columellae. Specimen, Catefica 50-S170419 (a–f). Scale bars = 600 Μm (a), 6 Μm (b–d), 1.5 Μm (e, f). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 37. Scanning electron microscope (SEM) images of "Stamen with tricolpate pollen sp. 1"; Catefica locality, Portugal. a) Stamen fragment showing the elongate, tetrasporangiate anther but with the base and apex poorly preserved; b–d) Pollen grains from stamen fragment in equatorial view showing the long colpi and well-developed, heterobrochate reticulum with very distinct large and small lumina; e) Detail of pollen wall showing orbicules with irregular projections; f) Detail of pollen wall showing smooth muri supported by short, densely spaced columellae. Specimen, Catefica 50-S170419 (a–f). Scale bars = 600 Μm (a), 6 Μm (b–d), 1.5 Μm (e, f).
Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 3"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment, containing one kind of pollen; b, d, e) Pollen grains from stamen fragment in polar (b, d) and equatorial (e) views showing the long colpi with coarsely verrucate aperture membranes; note the semitectate-reticulate tectum in the mesocolpium regions and foveolate-punctate tectum in the polar regions and along the aperture margins; c) Detail of pollen wall showing smooth muri and short, densely-spaced columellae. Specimen, Catefica 49-S107785 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1.5 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 3"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment, containing one kind of pollen; b, d, e) Pollen grains from stamen fragment in polar (b, d) and equatorial (e) views showing the long colpi with coarsely verrucate aperture membranes; note the semitectate-reticulate tectum in the mesocolpium regions and foveolate-punctate tectum in the polar regions and along the aperture margins; c) Detail of pollen wall showing smooth muri and short, densely-spaced columellae. Specimen, Catefica 49-S107785 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1.5 Μm (c).
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