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  1. Detailansicht für Treffer 1 öffnen
    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
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
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    View record in BASE (Volltext)
    Wie komme ich dran?
  2. Detailansicht für Treffer 2 öffnen
    Text-fig. 48. Scanning electron microscope (SEM, a, b, d–i) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c) images of 'One-seeded fruit sp. 2' (a–c), 'Unassigned, unnamed fruits' (d–f), Pazliopsis sp. (g, h) and 'Follicular fruit with exotestal seeds' (i); Catefica locality, Portugal. a) Lateral view of fruit showing remains of tepals (te) and a single stamen (st); b) Detail of fruit surface showing short, scale-like, peltate trichomes (arrows); c) Transverse section (orthoslice xy0475) of fruit containing a single seed showing tepals (te) and fruit surface with peltate trichomes (arrow); note partial preservation of internal nutritive tissue; d) Fruit in lateral view showing the almost smooth epidermis with scattered openings; e) Detail of fruit surface from (d) showing the scattered openings in the epidermis interpreted as burst secretory cells (arrows); f) Dorsi-ventral view of tiny fruit with an irregular surface; g) Lateral view of exotestal seed assigned to cf. Pazliopsis sp.; h) Detail of fruit surface of seed in (g) showing faint facets of outer palisade layer with fine jigsaw-puzzle outlines of the anticlinal walls; i) Lateral view of fragmentary follicular fruit showing two exposed exotestal seeds. Specimens, Catefica 153-S174314 (a–c), Catefica 50-S170420 (d, e), Catefica 152-S174300 (f), Catefica 49-S172319 (g, h), Catefica MM158-P0272 (i). Scale bars = 300 Μm (a, c, d, f, g, i), 100 Μm (e), 50 Μm (b, h). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  3. Detailansicht für Treffer 3 öffnen
    Text-fig. 25. Scanning electron microscope (SEM) images of stamens and pollen grains of Elasmostemon paisii gen. et sp. nov.; Catefica locality, Portugal. a) Stamen fragment showing two pairs of pollen sacs along the margins of the stamen with a broad connective that separates the thecae, except near the apex where the thecae meet; b) Detail of surface of pollen sacs showing larger cells (arrows), interpreted as ethereal oil cells; c) Pollen in situ from specimen in (a); d) Stamen fragment with apical and basal portion missing and surface slightly abraded and compressed obscuring cellular details; note remains of another stamen attached to the underside of the stamen; e–h) Pollen in situ from specimen in (d) showing long aperture (e) and pollen wall with heterobrochate reticulum (e–h); note narrow muri with flatten and smooth surface and short columellae (h). Specimens, Catefica 49-S115859 (a–c), Catefica 151-S105281 (holotype, d–h). Scale bars = 600 Μm (a, d), 50 Μm (b), 6 Μm (c, e–g), 1.5 Μm (h). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  4. Detailansicht für Treffer 4 öffnen
    Text-fig. 16. Scanning electron microscope (SEM) images of 'Stamen fragments with in situ Clavatipollenites- or Asteropollis-type pollen' (sp. 1: a–c; sp. 2: d–f; sp. 3: g–i); Catefica locality, Portugal. a) Stamen fragment showing pollen sacs; b) Distal view of pollen grain from (a) showing semitectate-reticulate tectum; c) Detail of pollen wall showing the semitectate-reticulate tectum and long, scattered, columellae supporting muri with fine pits and rounded supratectal ornamentation; note orbiculae with a finely spiny surface (arrows); d) Stamen showing very short filament, lateral pollen sacs and short apical extension of the narrow connective; e) Folded pollen grain from (d) showing semitectate-reticulate tectum; f) Detail of pollen wall from (d) showing the semitectatereticulate tectum and muri with fine rounded ornamentation; g) Stamen fragment; h, i) Detail of pollen grains from (g) showing the semitectate-reticulate tectum with smooth muri, long scattered columellae and tiny scattered orbicules (arrow). Specimens, Catefica 50-S170395 (a–c), Catefica 49-S172561 (d–f), Catefica 50-S170390 (g–i). Scale bars = 600 Μm (a, d, g), 6 Μm (b, e, h), 1.5 Μm (c, f, i). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  6. Detailansicht für Treffer 6 öffnen
    Text-fig. 30. Scanning electron microscope (SEM) images of anther and pollen of Kempia longicolpites; Catefica locality, Portugal. a) Transverse section through an anther showing the four pollen sacs with in situ pollen; b) Pollen in situ from anther in (a) showing very long colpus and loosely attached reticulum; c) Detail of reticulum showing smooth muri supported by short, scattered columellae; d) Pollen grain from anther in (a) enlarged showing colpus extended beyond the equator and loosely attached reticulum; e) Detail of pollen wall showing thick, homogeneous foot layer, columellae and reticulate tectum; note remains of granular endexine (arrows) in the apertural region of the grain; f) Internal view of reticulum showing the short columellae adhering to the muri detached from the foot layer. Specimen, Catefica 49-S101208 (a–f). Scale bars = 100 Μm (a), 20 Μm (b), 6 Μm (d), 3 Μm (c, e, f). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  7. Detailansicht für Treffer 7 öffnen
    Text-fig. 7. Scanning electron microscope (SEM, a–c, e, f) and synchrotron radiation X-ray tomographic microscopy (SRXTM, d) images of fruits and pollen grains of Hedyflora crystallifera; Catefica locality, Portugal. a, b) Lateral view of fruits showing the remains of apical tepals and remains of the hypanthium, which is thicker on the edges of the fruit in (b) (arrows); c) Detail of hypanthium surface between the thickenings on the edges of the fruit showing polygonal cells with a central papilla; d) Transverse section (orthoslice xy0600) of fruit and seed showing the finely crystalliferous endotesta (arrowhead) and sclerified outer tegmen (asterisk); e) Distal view of pollen grain from surface of fruit showing the poorly defined tetrachotomocolpate aperture (daggers indicating the four arms of the aperture) and semi-tectate, reticulate tectum; f) Detail of pollen wall showing narrow muri with indistinctly beaded surface ornamentation of minute verrucae in poorly defined rows and supported by long columellae. Specimens, Catefica 49-S172313 (a), Catefica 49-S153159 (b), Catefica 49-S172324 (c), Catefica 49-S172325 (d), Catefica 50-S170453 (e, f). Scale bars = 300 Μm (a, b), 100 Μm (d), 50 Μm (c), 6 Μm (e), 1.5 Μm (f). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  12. Detailansicht für Treffer 12 öffnen
    Text-fig. 27. Scanning electron microscope (SEM) images of stamens and pollen of Valvidistemon globiferus gen. et sp. nov.; Catefica locality, Portugal. a) Stamen in oblique lateral view showing laterally hinged valves, massive connective between the thecae and prominent, globular, apical extension of the connective; b) Stamen in oblique lateral view on the opposite side from (a) showing broken laterally hinged valves and distinct endothecium cells; c) Detail of stamen showing the large, longitudinally aligned cells of the massive connective, broad, poorly defined stamen base, and the laterally hinged valves of one of the thecae; d) Reticulate pollen attached to the inside of the anther wall. Specimen, Catefica 49-S107779 (holotype, a–d). Scale bars = 600 Μm (a, b), 100 Μm (c), 20 Μm (d). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  13. Detailansicht für Treffer 13 öffnen
    Text-fig. 4. Synchrotron radiation X-ray tomographic microscopy (SRXTM) images of seeds of Canrightia foveolata sp. nov.; Catefica locality, Portugal. a–d) Volume renderings of abraded seeds in ventral (a), lateral (b, d) and apical (c) views showing the slightly protruding chalaza (arrows) and dense longitudinal grooves with shallow pits in the surface of the endotesta; e) Transverse section of seed (orthoslice xy0665) showing the irregular grooved surface of the endotesta (oi-en) and the tegmen comprised of two layers of thick-walled cells that surround the cells of the prominent endothelium (asterisk); f) Longitudinal section (orthoslice xz1195) through seed showing the thin-walled endothelium cells (asterisk) surrounded by the thicker cells of the outer tegmen and endotesta; g) Longitudinal section (orthoslice yz0727) through seed showing outlines of angular crystals evenly distributed in cells of the endotesta (oi-en); note the outer epidermis of the tegmen (ii-o) composed of thick-walled cells; h) Longitudinal section (orthoslice xz0940) of seed showing details of the chalazal region with course of the vascular bundle (vb), cells of the prominent endothelium (asterisk), crystalliferous endotesta of the outer integument (oi-en) and the distinct thick walled cells of the outer cells of the tegmen (ii-o); i) Longitudinal and tangential section (orthoslice yz0542) through the endotesta (oi-en) showing the outlines of densely spaced crystals. Specimens, Catefica 242-S175178 (a–c, e–h), Catefica 49-S175179 (d, i). Scale bars = 300 Μm (a–d), 100 Μm (e, f, h, i), 50 Μm (g). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  15. Detailansicht für Treffer 15 öffnen
    Text-fig. 8. Scanning electron microscope (SEM) images of staminate inflorescences and pollen of Proencistemon portugallicus gen. et sp. nov.; Catefica locality, Portugal. a, b) Staminate inflorescences composed of numerous tetrasporangiate stamens; each stamen lacks a filament and there is no clear indication of other floral organs; note apparently paired arrangement of stamens in (b) (asterisks); c) Pollen in situ in anther from specimen in (a) showing poorly defined trichotomocolpate aperture and semitectate-reticulate tectum; d) Detail of pollen from specimen in (a) showing narrow muri with beaded surface ornamentation; e) Distal and proximal views of pollen in situ in an anther fragment; f) Orbicules attached to surface of in situ pollen from anther fragment. Specimens, Catefica M282-P0341 (holotype, a, c, d), Catefica 150-S174257 (b), Catefica 50-S170393 (e, f). Scale bars = 600 Μm (a, b), 6 Μm (c, e), 1.5 Μm (d, f). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  16. Detailansicht für Treffer 16 öffnen
    Text-fig. 3. Synchrotron radiation X-ray tomographic microscopy (SRXTM) images of fruits of Canrightia foveolata sp. nov.; Catefica locality, Portugal. a) Volume rendering of fruit showing prominent rim around the middle of the fruit with reduced tepals (arrowheads) and partly abraded fruit wall exposing the pitted endotesta surface of one of two seeds (arrow); note two of the vascular bundles (vb) extending from the base of the fruit to the tepals; b) Voltex of fruit showing prominent rim around the fruit (arrowhead) and dense precipitation of crystals in the endothelium cells of one of the two seeds in the fruit; c) Longitudinal section of fruit (orthoslice yz0520) showing the inferred hypanthium rim (arrow head) and two seeds, one with a dense precipitation of crystals; note the prominent endothelium cells (asterisks) of the inner integument and the well-developed fruit wall above the seeds; d) Transverse section through basal part of fruit and seeds close to the micropyle (orthoslice xy0312) showing partly abraded fruit wall with five vascular bundles (vb) and details of the seed coat with endotesta (oi-end) surrounding the tegmen consisting of an outer epidermis (ii-o), middle layer (ii-m) and a distinct inner epidermis (endothelium) consisting of radially elongated cells (asterisk); e) Transverse section (orthoslice xy1680) through apical part of the fruit close to chalaza showing the tips of two seeds; note the endotesta (oi-end) surrounded by thick-walled cells of the exotesta (oi-o); f) Transverse section (orthoslice in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?
  19. Detailansicht für Treffer 19 öffnen
    Text-fig. 28. Scanning electron microscope (SEM) images of stamens and pollen of Endressistemon cateficensis gen. et sp. nov.; Catefica locality, Portugal. a, b) Staminal structure with two lateral stamens and one median structure seen in ventral and dorsal view (orientation unknown) showing that each stamen has a prominent apical extension and two pairs of pollen sacs separated by a narrow connective; both stamens are borne on a common base together with the median structure and their anthers are sessile on the common stalk; note the apical projection of the median structure (asterisk) between the two stamens and the ribs over probable vascular bundles that extend from the common base into the apical projections of both stamens and the median structure (arrows); c) Staminal structure showing two stamens with prominent apical projections and median axis-like structure between the two stamens (arrow); d) Staminal structure showing two stamens with prominent apical projections borne on a common base; e) Staminal structure in (a) and (b), from the same orientation as (b), showing the ribs over probable vascular bundles (yellow) that extend into the apical projections; f) Detail of staminal structure in (a) and (b) showing the fused or strongly adhering apical projections of the two lateral stamens and the median structure (asterisk); g) Monocolpate, reticulate pollen grains from the pollen sacs of stamen in (d). Specimens, Catefica 49-S107778 (holotype, a, b, e, f), Catefica 49-S107769 (c), Catefica 49-S107751 (d, g). Scale bars = 600 Μm (a–d), 300 Μm (e), 100 Μm (f), 6 Μm (g). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
    Friis, Else Marie ; Crane, Peter R. ; et al.
    In: Fossil Imprint 78(2) 341-424, 2022
    Online Bild
    Zugriff:
    View record in BASE (Volltext)
    Wie komme ich dran?

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