390 research outputs found
Multiparted, Apocarpous Flowers From The Early Cretaceous Of Eastern North America And Portugal
No full textFriis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard (2020): Multiparted, Apocarpous Flowers From The Early Cretaceous Of Eastern North America And Portugal. Fossil Imprint 76 (2): 279-296, DOI: 10.37520/fi.2020.023, URL: http://dx.doi.org/10.37520/fi.2020.02
Text-fig. 1. Geological map of South Bohemian Basins. in Plant Mesofossils From The Late Cretaceous Klikov Formation, The Czech Republic
No full textText-fig. 1. Geological map of South Bohemian Basins.Published as part of Heřmanová, Zuzana, Kvaček, Jiří & Friis, Else Marie, 2021, Plant Mesofossils From The Late Cretaceous Klikov Formation, The Czech Republic, pp. 256-270 in Fossil Imprint 77 (2) on page 257, DOI: 10.37520/fi.2021.018, http://zenodo.org/record/716763
Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal
No full textFriis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard (2018): Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal. Fossil Imprint 74 (1-2): 135-158, DOI: 10.2478/if-2018-0010, URL: http://dx.doi.org/10.2478/if-2018-001
The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
No full textFriis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard (2019): The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community. Fossil Imprint 75 (2): 153-257, DOI: 10.2478/if-2019-0013, URL: http://dx.doi.org/10.2478/if-2019-001
Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications
No full textFriis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard (2021): Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications. Fossil Imprint 77 (2): 214-230, DOI: 10.37520/fi.2021.016, URL: http://dx.doi.org/10.37520/fi.2021.01
Sarcandra dolichostemon E. M. FRIIS, P. R. CRANE et K. R. PEDERSEN 2020
No full textCatanthus dolichostemon E.M.FRIIS, P.R.CRANE et K.R.PEDERSEN, 2020 Text-fig. 18a, b D e s c r i p t i o n a n d r e m a r k s. The species was described based on several flower buds and open flowers preserved as charcoalified or lignitic specimens from the Catefica mesofossil flora (for a full description see Friis et al. 2021; taxon names valid from effectively published online version in 2020, see Friis et al. 2020c). The flowers are whorled with nine tepals in three whorls of three and many stamens in several successive whorls. The stamens have long, broad and fleshy bases that continue into the short anthers without a joint. In lignitised specimens, the stamens are flattened, but their original bulky, three-dimensional shape is particularly well-preserved in charcoalified specimens (Text-fig. 18a, b). The pollen is circular in polar view, about 12 µm in diameter, monoaperturate and trichotomocolpate (Friis et al. 2021: fig. 4A–C). The gynoecium is superior, apocarpous and consists of six, or rarely five, carpels. A f f i n i t y a n d o t h e r o c c u r r e n c e s. A phylogenetic assessment of Catanthus dolichostemon suggests a relationship to extant members of Canellales and Magnoliales (Friis et al. 2021). The species is currently known only from the Catefica and Vale de Água mesofossil floras. Pollen grains of Catanthus dolichostemon have also been observed in palynological strew preparations from the Catefica microfossil assemblages.Published as part of Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, pp. 341-424 in Fossil Imprint 78 (2) on page 367, DOI: 10.37520/fi.2022.016, http://zenodo.org/record/752280
Canrightiopsis crassitesta E. M. FRIIS, P. R. CRANE et K. R. PEDERSEN 2019
No full textSerialis crassitesta E.M.FRIIS, P.R.CRANE et K.R.PEDERSEN, 2019 Text-fig. 17b D e s c r i p t i o n a n d r e m a r k s. The material includes several fruits with permanently adhering seeds that are assignable to Serialis crassitesta (Text-fig. 17b). A f f i n i t y a n d o t h e r o c c u r r e n c e s. Conclusions on the relationships of Serialis crassitesta are similar to those on Serialis communis (see above). Serialis crassitesta is common in the Famalicão mesofossil flora with about 375 specimens, but less common than S. communis. Serialis crassitesta is also common in the Vale de Água mesofossil flora (Friis et al. 2019c) and is present in the Chicalhão (“Fruits with co-adhering seeds in row type 2”; Mendes et al. 2014) and Nossa Senhora da Luz mesofossil floras (“Seeds in row”; Mendes and Friis 2018).Published as part of Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, pp. 341-424 in Fossil Imprint 78 (2) on page 366, DOI: 10.37520/fi.2022.016, http://zenodo.org/record/752280
Anacostia portugallica E. M. FRIIS, P. R. CRANE et K. R. PEDERSEN, Saportanthus 2020
No full textMugideiriflora portugallica E.M.FRIIS, P.R.CRANE et K.R.PEDERSEN, 2020 Text-fig. 2a, b D e s c r i p t i o n a n d r e m a r k s. Mugideiriflora portugallica is based on a single small, partly abraded, early anthetic flower (Text-fig. 2a) that has a multiparted perianth, androecium and gynoecium and was recovered from the Catefica mesofossil flora (for a full description and discussion of the species see Friis et al. 2020a). Additional specimens are preserved at very early developmental stages. The receptacle is slightly concave, but with a short conical apex in the gynoecial region (Text-fig. 2a). There are about 50 laminar tepals, 50 stamens and more than 50 carpels, all apparently in a spiral arrangement (Text-fig. 2b). A f f i n i t y a n d o t h e r o c c u r r e n c e s. Phylogenetic assessment suggests that Mugideiriflora portugallica is closely related to members of extant Austrobaileyales, although a possible affinity with members of extant Magnoliales cannot be excluded (Friis et al. 2020a). Mugideiriflora portugallica is currently known only from the Catefica mesofossil flora where it is recorded from samples collected near the base of the exposure.Published as part of Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, pp. 341-424 in Fossil Imprint 78 (2) on page 345, DOI: 10.37520/fi.2022.016, http://zenodo.org/record/752280
Sarcandra communis E. M. FRIIS, P. R. CRANE et K. R. PEDERSEN and Serialis 2019
No full textSerialis communis E.M.FRIIS, P.R.CRANE et K.R.PEDERSEN, 2019 Text-fig. 17a D e s c r i p t i o n a n d r e m a r k s. The material includes several fruits with three to five permanently adhering seeds assignable to Serialis communis (Text-fig. 17a). The fruit wall is thin and typically almost entirely lost by abrasion. The seeds are anatropous, and bitegmic with a thick mesotestal-endotestal seed coat. The micropyle is formed from the inner integument and the micropylar region is seen on the seed surface as a transverse slit in the testa (Text-fig. 17a). In all details the seeds are comparable to the type material from the Famalicão mesofossil flora (Friis et al. 2019c). A f f i n i t y a n d o t h e r o c c u r r e n c e s. Fruits and seeds assigned to the extinct genus Serialis are among the most diverse fossils in Early Cretaceous mesofossil floras from Portugal and nine different species have been recognized (Friis et al. 2019c). Phylogenetic analysis indicates a close relationship of Serialis to Magnoliales, but the genus cannot be placed confidently in any extant taxon within the order. The type material of Serialis communis is from the Famalicão mesofossil flora where S. communis is the most abundant species and more than 2,230 specimens are known. Serialis communis is also reported from the Arazede and Vale de Água localities (Friis et al. 2019c) and is also present in the Chicalhão mesofossil flora (“Fruits with co-adhering seeds in row type 1”; Mendes et al. 2014).Published as part of Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, pp. 341-424 in Fossil Imprint 78 (2) on page 366, DOI: 10.37520/fi.2022.016, http://zenodo.org/record/752280
Text-fig. 9. The drawing shows the ratio of epigynous and hypogenous flowers in Zliv-Řídká Blana mesofossil flora. The ovary is inferior, and the flower is epigynous in 17 taxa. The ovary is superior, and the flower is hypogenous in 20 taxa. in Plant Mesofossils From The Late Cretaceous Klikov Formation, The Czech Republic
No full textText-fig. 9. The drawing shows the ratio of epigynous and hypogenous flowers in Zliv-Řídká Blana mesofossil flora. The ovary is inferior, and the flower is epigynous in 17 taxa. The ovary is superior, and the flower is hypogenous in 20 taxa.Published as part of Heřmanová, Zuzana, Kvaček, Jiří & Friis, Else Marie, 2021, Plant Mesofossils From The Late Cretaceous Klikov Formation, The Czech Republic, pp. 256-270 in Fossil Imprint 77 (2) on page 266, DOI: 10.37520/fi.2021.018, http://zenodo.org/record/716763
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