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2 results for “Silutanispermum”
Text-fig. 11. Silutanispermum kvacekiorum gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, volume renderings). a, b) Holotype (S170238), seed in oblique (a) and lateral (b) view showing large triangular hilar scar (hi) and transverse micropylar slit (mi). c) Oblique view of seed showing slightly raised raphal area (S174352); remains of mounting media (¤). d) Details of holotype showing triangular hilum (hi) and transverse micropylar slit in the exotesta (mi). e) Cut volume rendering of holotype (cut at yz1170) through the median plane showing hilum (hi) and micropylar slit (mi) lined by radially expanded exotestal cells. Scale bars = 500 µm (a–c); 250 µm (d, e). in Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal
Text-fig. 11. Silutanispermum kvacekiorum gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, volume renderings). a, b) Holotype (S170238), seed in oblique (a) and lateral (b) view showing large triangular hilar scar (hi) and transverse micropylar slit (mi). c) Oblique view of seed showing slightly raised raphal area (S174352); remains of mounting media (¤). d) Details of holotype showing triangular hilum (hi) and transverse micropylar slit in the exotesta (mi). e) Cut volume rendering of holotype (cut at yz1170) through the median plane showing hilum (hi) and micropylar slit (mi) lined by radially expanded exotestal cells. Scale bars = 500 µm (a–c); 250 µm (d, e).
Text-fig. 12. Silutanispermum kvacekiorum gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz1170) through the median plane of the seed (S170238) in the micropylar region showing exotestal cells lining the micropylar slit (mi) and hilum (hi); note the well-preserved mesotestal cells (me). b) Longitudinal orthoslice (xz0805) of seed perpendicular to the median plane through the micropylar region showing the transverse micropylar slit (mi) lined by radiating exotestal cells; note abundant mesotestal cells (me). c) Transverse orthoslice (xy0768) through seed below hilum and micropyle showing exotesta (ex) and mesotesta (me) that is strongly developed along the raphe (ra) (S174352). d) Transverse orthoslice (xy2113) through middle of the seed showing well-preserved cellular nutritive tissue with empty cells; note that the raphe (ra) is enclosed in mesotestal tissue (S174352). e) Longitudinal orthoslice (yz0970) through seed coat showing exotesta (ex) of tall palisade-shaped cells and thick mesotesta (me) of low cells (S174352). Scale bars = 500 µm (a, c, d); 250 µm (b); 125 µm (e). in Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal
Text-fig. 12. Silutanispermum kvacekiorum gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz1170) through the median plane of the seed (S170238) in the micropylar region showing exotestal cells lining the micropylar slit (mi) and hilum (hi); note the well-preserved mesotestal cells (me). b) Longitudinal orthoslice (xz0805) of seed perpendicular to the median plane through the micropylar region showing the transverse micropylar slit (mi) lined by radiating exotestal cells; note abundant mesotestal cells (me). c) Transverse orthoslice (xy0768) through seed below hilum and micropyle showing exotesta (ex) and mesotesta (me) that is strongly developed along the raphe (ra) (S174352). d) Transverse orthoslice (xy2113) through middle of the seed showing well-preserved cellular nutritive tissue with empty cells; note that the raphe (ra) is enclosed in mesotestal tissue (S174352). e) Longitudinal orthoslice (yz0970) through seed coat showing exotesta (ex) of tall palisade-shaped cells and thick mesotesta (me) of low cells (S174352). Scale bars = 500 µm (a, c, d); 250 µm (b); 125 µm (e).
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