Southern Hemisphere Caytoniales: vegetative and reproductive remains from the Lonco Trapial Formation (Lower Jurassic), Patagonia

@article{Elgorriaga2019SouthernHC,
  title={Southern Hemisphere Caytoniales: vegetative and reproductive remains from the Lonco Trapial Formation (Lower Jurassic), Patagonia},
  author={Andr{\'e}s Elgorriaga and Ignacio H. Escapa and N. Rub{\'e}n C{\'u}neo},
  journal={Journal of Systematic Palaeontology},
  year={2019},
  volume={17},
  pages={1477 - 1495}
}
Macrofossil impressions of caytonialean leaves and micro- and megasporangiate organs from the Early Jurassic Taquetrén locality in Patagonia, Argentina, are described based on more than 300 hand specimens. Leaves of the organ-genus Sagenopteris are described using both discrete and continuous features allowing us to erect the species Sagenopteris trapialensis sp. nov. Associated microsporangiate organs of Caytonanthus type are the first recorded for South America and are characterized by a… 

A eudicot leaf from the Lower Cretaceous (Aptian, Araripe Basin) Crato Konservat-Lagerstätte.

The combination of characters preserved in the fossil supports the interpretation that B. pinnatissecta was an herbaceous eudicot similar to some members of Ranunculales and distinguished from other lobate Aptian angiosperms by leaf shape, presence of multiple orders of reticulate venation, and the absence of glandular teeth.

Evidence for an extinct lineage of angiosperms from the Early Cretaceous of Patagonia and implications for the early radiation of flowering plants.

Whereas many Early Cretaceous angiosperms fall within the morphological range of extant taxa, Mesodescolea reveals unexpected early morphological and ecophysiological trends.

Pteridospermophyta in the Mesozoic floras of Abyek and Jirande, Western Alborz, Iran

This paper deals with the Mesozoic seed ferns from the Shemshak Group from two localities in the Western Alborz Mountains, Northern Iran (i.e., the Abyek area in Qazvin Province and the Jirande area

U-Pb age constraints on the Jurassic succession and paleoflora of Mount Flora, Antarctic Peninsula

The spectacular fossil plant assemblage preserved in the non-marine Mount Flora Formation of the northern Antarctic Peninsula represents the diverse Jurassic flora that once covered the Gondwanan

U–Pb age constraints on the Jurassic succession and paleoflora of Mount Flora, Antarctic Peninsula

The spectacular fossil plant assemblage preserved in the non-marine Mount Flora Formation of the northern Antarctic Peninsula represents the diverse Jurassic flora that once covered the Gondwanan

References

SHOWING 1-10 OF 217 REFERENCES

First record of microsporophyll genus Caytonanthus Thomas from Early Cretaceous beds of South Rewa Gondwana Basin, India: Its evolutionary and palaeogeographical significance

Pteridosperms (seed ferns) are an extinct group of large and diverse plants. They were dominant elements during Palaeozoic and were also an important component in the Mesozoic vegetation but declined

Seed ferns from the late Paleozoic and Mesozoic: Any angiosperm ancestors lurking there?

It is concluded that, in the case of these seed plants, phylogenetic analysis techniques have surpassed the hard data needed to formulate meaningful phylogenetic hypotheses.

Caytoniales in Early Jurassic floras from Antarctica

Systematics and Paleoecology of a New Peltaspermalean Seed Fern from the Triassic Polar Vegetation of Gondwana

It is suggested that the matatiellacean peltasperms were opportunistic, early successional plants that were particularly successful in colonizing stressed wetland environments in polar latitudes during the Triassic.

Pteridospermas del Triásico-Jurásico de Australia: especiación, diversidad y declive

Pteridosperms are preserved abundantly in the Gondwanan Triassic, with many species exhibiting considerable morphological variation that has been attributed to a hybridization model of speciation.

An Early Jurassic flora from the Clarence-Moreton Basin, Australia

Distinguishing angiophytes from the earliest angiosperms: A Lower Cretaceous (Valanginian-Hauterivian) fruit-like reproductive structure.

They show that nearly total ovule enclosure, a level of organization approaching angiospermy, was achieved by advanced seed ferns during the Mesozoic, and include tetrahedral seeds within cupule- or carpel-like structures.

Cretaceous fossil wood and palynomorphs from Williams Point, Livingston Island, Antarctic Peninsula

A new Cheirolepidiaceae (Coniferales) from the Early Jurassic of Patagonia (Argentina): Reconciling the records of impression and permineralized fossils.

Pararaucaria taquetrensis represents the oldest known Cheirolepidiaceae seed cones from the Southern Hemisphere, and this material highlights the importance of compression and impression fossils in understanding the distribution of fossil taxa.
...