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4 results for “Paisia”
Text-fig. 33. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a, c) and scanning electron microscope (SEM, b, d) images of Paisia pantoporata (a–c) and?Paisia sp. (d); Catefica locality, Portugal. a) Lateral view (volume rendering) of flower showing the carpels (c) and the fleshy tepals (t) that have a slightly bulge near the base; b) Pollen grains in situ from stamen showing scattered pores and spiny supratectal ornamentation; c) Transverse section (orthoslice xz1024) through flower showing the pentamerous organization with five tepals (green) five stamens (yellow) and five carpels (red) all on the same radii; d) Lateral view of floral structure with three free carpels borne on the swollen receptacle that has poorly defined facets at the apex indicating the former presence of perianth parts. Specimens, Catefica 49-S101214 (a, c), Catefica 50-S170188 (b), Catefica MM125-P0292 (d). Scale bars = 300 Μm (a, c, d), 6 Μm (b). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 33. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a, c) and scanning electron microscope (SEM, b, d) images of Paisia pantoporata (a–c) and?Paisia sp. (d); Catefica locality, Portugal. a) Lateral view (volume rendering) of flower showing the carpels (c) and the fleshy tepals (t) that have a slightly bulge near the base; b) Pollen grains in situ from stamen showing scattered pores and spiny supratectal ornamentation; c) Transverse section (orthoslice xz1024) through flower showing the pentamerous organization with five tepals (green) five stamens (yellow) and five carpels (red) all on the same radii; d) Lateral view of floral structure with three free carpels borne on the swollen receptacle that has poorly defined facets at the apex indicating the former presence of perianth parts. Specimens, Catefica 49-S101214 (a, c), Catefica 50-S170188 (b), Catefica MM125-P0292 (d). Scale bars = 300 Μm (a, c, d), 6 Μm (b).
Text-fig. 36. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a–e) images of "Paisia-like follicle"; Catefica locality, Portugal. a, b) Volume rendering of follicle in lateral (a) and ventral (b) views showing the decurrent stigmatic region that extends from the follicle base to the apex but lacks a distinct papillate zone; c) Longitudinal section (volume rendering cut at orthoslice yz0341) of follicle showing under-developed ovules towards the base and numerous well-developed ovules/seeds in the upper part suggesting that the follicle is probably mature; d) Dorsal view of follicle apex showing the cleft in the presumed stigmatic apical region; e) Transverse section (orthoslice xy1294) of follicle with one dorsal and two ventral bundles and two placentae bulging into the locule, one on either side of the ventral suture; note the strongly compressed outer epidermis and the homogenized cells of the mesocarp. Specimen, Catefica 49-S174915 (a–e). Scale bars = 300 Μm (a–d), 100 Μm (e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 36. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a–e) images of "Paisia-like follicle"; Catefica locality, Portugal. a, b) Volume rendering of follicle in lateral (a) and ventral (b) views showing the decurrent stigmatic region that extends from the follicle base to the apex but lacks a distinct papillate zone; c) Longitudinal section (volume rendering cut at orthoslice yz0341) of follicle showing under-developed ovules towards the base and numerous well-developed ovules/seeds in the upper part suggesting that the follicle is probably mature; d) Dorsal view of follicle apex showing the cleft in the presumed stigmatic apical region; e) Transverse section (orthoslice xy1294) of follicle with one dorsal and two ventral bundles and two placentae bulging into the locule, one on either side of the ventral suture; note the strongly compressed outer epidermis and the homogenized cells of the mesocarp. Specimen, Catefica 49-S174915 (a–e). Scale bars = 300 Μm (a–d), 100 Μm (e).
Text-fig. 35. Scanning electron microscope (SEM, a, b, d) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c, e) images of "Paisia-like follicle"; Catefica locality, Portugal. a) Lateral view of slender follicle with an almost straight ventral margin and a slightly curved dorsal margin; b) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; c) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; d) Apical part of follicle in (a) showing the slight apical cleft in the probable stigmatic region; e) Transverse section (orthoslice xy0407) of follicle showing ovules and distinct follicle wall with small, thin-walled cells of the outer epidermis (arrow), larger, isodiametric cells of the mesocarp and an inner layer of smaller, thin-walled cells. Specimens, Catefica 50-S171523 (a, d), Catefica 343-S171515 (b), Catefica 49-S174929 (c, e). Scale bars = 300 Μm (a–c), 100 Μm (d, e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 35. Scanning electron microscope (SEM, a, b, d) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c, e) images of "Paisia-like follicle"; Catefica locality, Portugal. a) Lateral view of slender follicle with an almost straight ventral margin and a slightly curved dorsal margin; b) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; c) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; d) Apical part of follicle in (a) showing the slight apical cleft in the probable stigmatic region; e) Transverse section (orthoslice xy0407) of follicle showing ovules and distinct follicle wall with small, thin-walled cells of the outer epidermis (arrow), larger, isodiametric cells of the mesocarp and an inner layer of smaller, thin-walled cells. Specimens, Catefica 50-S171523 (a, d), Catefica 343-S171515 (b), Catefica 49-S174929 (c, e). Scale bars = 300 Μm (a–c), 100 Μm (d, e).
Text-fig. 34. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a–h) images of "Paisia-like follicle"; Catefica locality, Portugal. a–d) Volume rendering of follicles in lateral (a, c) and ventral (b, d) views showing the decurrent stigmatic region that extends from base of the follicle to the apex; note papillate zone forming a probable stigma along the full length of the ventral suture; e) Longitudinal section (volume rendering cut at orthoslice yz0326) near the base of the follicle showing two ovules with a striate-reticulate surface (asterisks); note transverse fibers lining the inner follicle wall and large cells of the mesocarp; f) Transverse section (volume rendering cut at orthoslice xy2475) of follicle showing two rows of ovules borne on placentae on either side of the ventral suture (asterisks); note also the pronounced and densely-spaced papillae around the ventral suture; g) Transverse section (orthoslice xy1988) of follicle showing two ventral vascular bundles and one dorsal bundle (arrows) and ovules/seeds borne on two placentae, one on either side of the ventral suture; note the remains of the small thin-walled cells of the outer epidermis that cover the thicker-walled cells of the mesocarp; h) Transverse section (orthoslice xy2860) of follicle showing two ventral bundles and one dorsal bundle (arrows) and ovules/seeds in two rows on the placentae, one on either side of the ventral suture; note the remains of small epidermal cells and the large rounded cells of the mesocarp with thicker walls. Specimens, Catefica 49-S174916 (a, b), Catefica 49-S174917 (c–f, h), Catefica 50-S171525 (g). Scale bars = 300 Μm (a–d), 100 Μm (e–h). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 34. Synchrotron radiation X-ray tomographic microscopy (SRXTM, a–h) images of "Paisia-like follicle"; Catefica locality, Portugal. a–d) Volume rendering of follicles in lateral (a, c) and ventral (b, d) views showing the decurrent stigmatic region that extends from base of the follicle to the apex; note papillate zone forming a probable stigma along the full length of the ventral suture; e) Longitudinal section (volume rendering cut at orthoslice yz0326) near the base of the follicle showing two ovules with a striate-reticulate surface (asterisks); note transverse fibers lining the inner follicle wall and large cells of the mesocarp; f) Transverse section (volume rendering cut at orthoslice xy2475) of follicle showing two rows of ovules borne on placentae on either side of the ventral suture (asterisks); note also the pronounced and densely-spaced papillae around the ventral suture; g) Transverse section (orthoslice xy1988) of follicle showing two ventral vascular bundles and one dorsal bundle (arrows) and ovules/seeds borne on two placentae, one on either side of the ventral suture; note the remains of the small thin-walled cells of the outer epidermis that cover the thicker-walled cells of the mesocarp; h) Transverse section (orthoslice xy2860) of follicle showing two ventral bundles and one dorsal bundle (arrows) and ovules/seeds in two rows on the placentae, one on either side of the ventral suture; note the remains of small epidermal cells and the large rounded cells of the mesocarp with thicker walls. Specimens, Catefica 49-S174916 (a, b), Catefica 49-S174917 (c–f, h), Catefica 50-S171525 (g). Scale bars = 300 Μm (a–d), 100 Μm (e–h).
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