Text-fig. 52. The distribution of aperture and tectum types among the 34 different kinds of angiosperm pollen encountered in the Catefica mesofossil flora. 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). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 41. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. ...

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate pollen"; Catefica locality, Portugal. a) Stamen with four pollen sacs and an adhering bract (arrow); b) Pollen grains from stamen showing the large gaping, almost circular, aperture with a distinct aperture margin; c) Detail of pollen wall showing finely verrucate supratectal ornamentation and bases of broken columellae; d) Pollen grain showing the large gaping, rounded aperture; e) Pollen grains showing large, rounded aperture (left) and abraded reticulum exposing the surface of the foot layer and long columellae (right). Specimen, Catefica 49-S170144 (a–e). Scale bars = 600 Μm (a), 20 Μm (b), 6 Μm (d, e), 1.5 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate poll...

The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel, Kvaček, Jiří (20...

Text-fig. 51. Number of specimens and number of species for the five categories of angiosperms distinguished from the Catefica mesofossil flora. in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 51. Number of specimens and number of species for the five categories of angiosperms disti...

Text-fig. 28. Scanning electron microscope (SEM) images of monocolpate pollen of Goczania inaequalis sp. nov.; Torres Vedras locality, Portugal. a) Holotype; stamen fragment that yielded the pollen in (b–f, k); b) Group of pollen grains showing distal and proximal surfaces and inner surface of anther wall with densely spaced orbicules; c) Inner surface of anther wall showing small, spherical orbicules with microechinate sculpturing; d, e, j–l) Pollen grains in distal and equatorial view (k) showing the long colpus with an irregular margin flanked by narrow bands of poorly differentiated microechinate; note that colpus is aligned perpendicular to the longest axes in elliptical grains and that the pollen wall is almost psilate around the equator and in the distal in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard

November 2019

Text-fig. 28. Scanning electron microscope (SEM) images of monocolpate pollen of Goczania inaequalis...

Text-fig. 31. Scanning electron microscope (SEM) images of isolated pollen of Piercipollis sp. (a, b) and Teebacia sp. (c–e); Catefica locality, Portugal. a) Isolated pollen grain (arrow) adhering to the much larger pollen of Araucariacites sp. in fragment of a conifer cone; note the size difference between the angiosperm and conifer pollen that is typical in Early Cretaceous floras; b) Pollen grain in (a) enlarged showing the extended aperture and homobrochate reticulum with smooth muri supported by long, scattered, columellae; c) Isolated pollen grains adhering to the outer surface of a Saportanthus parvus flower; d) Pollen grain in (c) enlarged showing the open reticulum and muri ornamented by fine transverse ribs; e) Detail of pollen grain in (d) showing the muri supported by long, scattered columellae; note the fine transverse ribs on the muri. Specimens, Catefica 49-S170139-01 (a, b), Catefica 361-S174322-01 (c–e). Scale bars = 50 Μm (a), 20 Μm (c), 6 Μm (b, d), 1.5 Μm (e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 31. Scanning electron microscope (SEM) images of isolated pollen of Piercipollis sp. (a, b...

Text-fig. 9. Scanning electron microscope (SEM) images of stamens and pollen of Proencistemon portugallicus gen. et sp. nov. (a–g) and Proencistemon sp. (h–j); Catefica locality, Portugal. a) Fragment of stamen whorl from staminate inflorescence showing almost sessile anthers; note short bracts at the base of the stamen whorl (arrow) and apparent paired arrangement of the stamens; b) Fragment of stamen whorl showing almost sessile anthers and apparent paired arrangement of the stamens; c) Pollen in situ from stamen whorl in (b) showing poorly defined trichotomocolpate aperture and semitectate-reticulate tectum; d–g) Distal views of pollen in situ from in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 9. Scanning electron microscope (SEM) images of stamens and pollen of Proencistemon portug...

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.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 8. Scanning electron microscope (SEM) images of staminate inflorescences and pollen of Pro...

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.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 27. Scanning electron microscope (SEM) images of stamens and pollen of Valvidistemon globi...

Text-fig. 9. Scanning electron microscope (SEM) images of inaperturate Araucariacites sp. pollen from two fragmentary pollen sacs; Torres Vedras locality, Portugal. a) Fragmentary pollen sac; b) Granular inner surface of pollen sac (a); c) Orbicule showing finely striate surface; d) Group of pollen grains from pollen sac in (a) showing granular exine surface and numerous orbicules; note that the scale bar (12 Μm) is two times larger than that used for most other pollen grains illustrated in this paper (6 Μm). Specimens, TV44-S148025 (a, b, d), TV44-S148146 (c). Scale bars 150 Μm (a), 12 Μm (d), 3 Μm (b, c). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard

November 2019

Text-fig. 9. Scanning electron microscope (SEM) images of inaperturate Araucariacites sp. pollen fro...

Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp....

Text-fig. 13. Scanning electron microscope (SEM) images of "Staminate inflorescence fragment with Clavatipollenites-type pollen sp. 4"; Catefica locality, Portugal. a) Fragment of stamen whorl from staminate inflorescence showing several closely packed, almost sessile stamens that lack a well-developed filament; b, c) Distal and proximal views of pollen grains showing poorly defined aperture with verrucate aperture membrane; d) Detail of pollen wall showing the semitectate-reticulate tectum and long, scattered columellae supporting the narrow muri with finely verrucate supratectal ornamentation. Specimen, Catefica 49-S107782 (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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 13. Scanning electron microscope (SEM) images of "Staminate inflorescence fragment with Cl...

Text-fig. 45. Scanning electron microscope (SEM) images of "Staminate structure"; Catefica locality, Portugal. a–c) Staminate structure in oblique apical (a), oblique basal (b) and lateral (c) views showing distinct stalk and head with a cluster of about 20 stamens; note bracts at the base of the structure (asterisks) and probable secretory openings in the anther tissues (arrows). Specimen, Catefica 358-S135451 (a–c). Scale bars = 600 Μm (a–c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 45. Scanning electron microscope (SEM) images of "Staminate structure"; Catefica locality,...

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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. ...

Text-fig. 24. Scanning electron microscope (SEM) images of "Stamen with zona-aperturate pollen"; Catefica locality, Portugal. a) Dorsal view of elongated anther showing the broad connective and very narrow pollen sacs; b) Lateral view of elongated anther showing the broad dorsal and ventral surfaces of the connectives and very narrow pollen sacs; c) Apex of elongated anther showing dorsal and ventral surfaces and very narrow pollen sacs; d) Lateral view of narrow pollen sac showing in situ pollen; e) Detail of pollen grain showing the solid band of exine above the aperture (asterisk); f) Detail of pollen grain showing the solid in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 24. Scanning electron microscope (SEM) images of "Stamen with zona-aperturate pollen"; Cat...

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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 41. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. ...

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate pollen"; Catefica locality, Portugal. a) Stamen with four pollen sacs and an adhering bract (arrow); b) Pollen grains from stamen showing the large gaping, almost circular, aperture with a distinct aperture margin; c) Detail of pollen wall showing finely verrucate supratectal ornamentation and bases of broken columellae; d) Pollen grain showing the large gaping, rounded aperture; e) Pollen grains showing large, rounded aperture (left) and abraded reticulum exposing the surface of the foot layer and long columellae (right). Specimen, Catefica 49-S170144 (a–e). Scale bars = 600 Μm (a), 20 Μm (b), 6 Μm (d, e), 1.5 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate poll...

The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel, Kvaček, Jiří (20...

Text-fig. 51. Number of specimens and number of species for the five categories of angiosperms distinguished from the Catefica mesofossil flora. in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 51. Number of specimens and number of species for the five categories of angiosperms disti...

Text-fig. 28. Scanning electron microscope (SEM) images of monocolpate pollen of Goczania inaequalis sp. nov.; Torres Vedras locality, Portugal. a) Holotype; stamen fragment that yielded the pollen in (b–f, k); b) Group of pollen grains showing distal and proximal surfaces and inner surface of anther wall with densely spaced orbicules; c) Inner surface of anther wall showing small, spherical orbicules with microechinate sculpturing; d, e, j–l) Pollen grains in distal and equatorial view (k) showing the long colpus with an irregular margin flanked by narrow bands of poorly differentiated microechinate; note that colpus is aligned perpendicular to the longest axes in elliptical grains and that the pollen wall is almost psilate around the equator and in the distal in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard

November 2019

Text-fig. 28. Scanning electron microscope (SEM) images of monocolpate pollen of Goczania inaequalis...

Text-fig. 31. Scanning electron microscope (SEM) images of isolated pollen of Piercipollis sp. (a, b) and Teebacia sp. (c–e); Catefica locality, Portugal. a) Isolated pollen grain (arrow) adhering to the much larger pollen of Araucariacites sp. in fragment of a conifer cone; note the size difference between the angiosperm and conifer pollen that is typical in Early Cretaceous floras; b) Pollen grain in (a) enlarged showing the extended aperture and homobrochate reticulum with smooth muri supported by long, scattered, columellae; c) Isolated pollen grains adhering to the outer surface of a Saportanthus parvus flower; d) Pollen grain in (c) enlarged showing the open reticulum and muri ornamented by fine transverse ribs; e) Detail of pollen grain in (d) showing the muri supported by long, scattered columellae; note the fine transverse ribs on the muri. Specimens, Catefica 49-S170139-01 (a, b), Catefica 361-S174322-01 (c–e). Scale bars = 50 Μm (a), 20 Μm (c), 6 Μm (b, d), 1.5 Μm (e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 31. Scanning electron microscope (SEM) images of isolated pollen of Piercipollis sp. (a, b...

Text-fig. 9. Scanning electron microscope (SEM) images of stamens and pollen of Proencistemon portugallicus gen. et sp. nov. (a–g) and Proencistemon sp. (h–j); Catefica locality, Portugal. a) Fragment of stamen whorl from staminate inflorescence showing almost sessile anthers; note short bracts at the base of the stamen whorl (arrow) and apparent paired arrangement of the stamens; b) Fragment of stamen whorl showing almost sessile anthers and apparent paired arrangement of the stamens; c) Pollen in situ from stamen whorl in (b) showing poorly defined trichotomocolpate aperture and semitectate-reticulate tectum; d–g) Distal views of pollen in situ from in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 9. Scanning electron microscope (SEM) images of stamens and pollen of Proencistemon portug...

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.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 8. Scanning electron microscope (SEM) images of staminate inflorescences and pollen of Pro...

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.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 27. Scanning electron microscope (SEM) images of stamens and pollen of Valvidistemon globi...

Text-fig. 9. Scanning electron microscope (SEM) images of inaperturate Araucariacites sp. pollen from two fragmentary pollen sacs; Torres Vedras locality, Portugal. a) Fragmentary pollen sac; b) Granular inner surface of pollen sac (a); c) Orbicule showing finely striate surface; d) Group of pollen grains from pollen sac in (a) showing granular exine surface and numerous orbicules; note that the scale bar (12 Μm) is two times larger than that used for most other pollen grains illustrated in this paper (6 Μm). Specimens, TV44-S148025 (a, b, d), TV44-S148146 (c). Scale bars 150 Μm (a), 12 Μm (d), 3 Μm (b, c). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard

November 2019

Text-fig. 9. Scanning electron microscope (SEM) images of inaperturate Araucariacites sp. pollen fro...

Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp....

Text-fig. 13. Scanning electron microscope (SEM) images of "Staminate inflorescence fragment with Clavatipollenites-type pollen sp. 4"; Catefica locality, Portugal. a) Fragment of stamen whorl from staminate inflorescence showing several closely packed, almost sessile stamens that lack a well-developed filament; b, c) Distal and proximal views of pollen grains showing poorly defined aperture with verrucate aperture membrane; d) Detail of pollen wall showing the semitectate-reticulate tectum and long, scattered columellae supporting the narrow muri with finely verrucate supratectal ornamentation. Specimen, Catefica 49-S107782 (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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 13. Scanning electron microscope (SEM) images of "Staminate inflorescence fragment with Cl...

Text-fig. 45. Scanning electron microscope (SEM) images of "Staminate structure"; Catefica locality, Portugal. a–c) Staminate structure in oblique apical (a), oblique basal (b) and lateral (c) views showing distinct stalk and head with a cluster of about 20 stamens; note bracts at the base of the structure (asterisks) and probable secretory openings in the anther tissues (arrows). Specimen, Catefica 358-S135451 (a–c). Scale bars = 600 Μm (a–c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 45. Scanning electron microscope (SEM) images of "Staminate structure"; Catefica locality,...

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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. ...

Text-fig. 24. Scanning electron microscope (SEM) images of "Stamen with zona-aperturate pollen"; Catefica locality, Portugal. a) Dorsal view of elongated anther showing the broad connective and very narrow pollen sacs; b) Lateral view of elongated anther showing the broad dorsal and ventral surfaces of the connectives and very narrow pollen sacs; c) Apex of elongated anther showing dorsal and ventral surfaces and very narrow pollen sacs; d) Lateral view of narrow pollen sac showing in situ pollen; e) Detail of pollen grain showing the solid band of exine above the aperture (asterisk); f) Detail of pollen grain showing the solid in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 24. Scanning electron microscope (SEM) images of "Stamen with zona-aperturate pollen"; Cat...

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

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 41. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. ...

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate pollen"; Catefica locality, Portugal. a) Stamen with four pollen sacs and an adhering bract (arrow); b) Pollen grains from stamen showing the large gaping, almost circular, aperture with a distinct aperture margin; c) Detail of pollen wall showing finely verrucate supratectal ornamentation and bases of broken columellae; d) Pollen grain showing the large gaping, rounded aperture; e) Pollen grains showing large, rounded aperture (left) and abraded reticulum exposing the surface of the foot layer and long columellae (right). Specimen, Catefica 49-S170144 (a–e). Scale bars = 600 Μm (a), 20 Μm (b), 6 Μm (d, e), 1.5 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Text-fig. 32. Scanning electron microscope (SEM) images of "Stamen with monocolpate, reticulate poll...

The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Mendes, Mário Miguel
Kvaček, Jiří

December 2022

Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel, Kvaček, Jiří (20...

Text-fig. 52. The distribution of aperture and tectum types among the 34 different kinds of angiosperm pollen encountered in the Catefica mesofossil flora. in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Abstract

Extracted data

Text-fig. 52. The distribution of aperture and tectum types among the 34 different kinds of angiosperm pollen encountered in the Catefica mesofossil flora. in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms

Abstract

Extracted data

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