Late Palaeozoic Foliage from China Displays Affinities to Cycadales Rather than to Bennettitales Necessitating a Re-Evaluation of the Palaeozoic Pterophyllum Species

@inproceedings{Pott2009LatePF,
  title={Late Palaeozoic Foliage from China Displays Affinities to Cycadales Rather than to Bennettitales Necessitating a Re-Evaluation of the Palaeozoic Pterophyllum Species},
  author={Christiane Pott and Stephen McLoughlin and Anna Lindstr{\"o}m},
  year={2009}
}
The epidermal anatomy of Pseudoctenis samchokense is described revealing non-bennettitalean characters of these leaves from the Permo-Carboniferous of China (and Korea). The specimens were originally described as Pterophyllum samchokense suggesting a bennettitalean affinity. They can no longer be considered bennettitalean since their cuticles lack the distinctive brachyparacytic stomata of that clade. Pterophyllum was originally erected as a morphogenus for segmented leaves from the Mesozoic… 

Bennettitalean Leaves From the Permian of Equatorial Pangea—The Early Radiation of an Iconic Mesozoic Gymnosperm Group

Bennettitaleans are an extinct group of gymnosperms that are among the most iconic plants of Earth’s vegetation during the Mesozoic Era. The sudden appearance and rise to dominance of the

Williamsonia carolinensis sp. nov. and Associated Eoginkgoites Foliage from the Upper Triassic Pekin Formation, North Carolina: Implications for Early Evolution in the Williamsoniaceae (Bennettitales)

The unique features of W. carolinensis, along with the probable affinity with Eoginkgoites foliage, expands the known diversity of the Williamsoniaceae and supports previous suggestions of remarkably high levels of morphological disparity in the earliest history of the Bennettitales.

Leaf anatomy of a late Palaeozoic cycad

Pinnate leaves of Plagiozamites oblongifolius Halle 1927 with well-preserved cuticles showing the epidermal anatomy are described from the upper Permian Xuanwei Formation of Yunnan Province, Southwest China.

Voltzian Conifers of the South Ash Pasture Flora (Guadalupian, Texas): Johniphyllum multinerve gen. et sp. nov., Pseudovoltzia sapflorensis sp. nov., and Wantus acaulis gen. et sp. nov.

  • C. LooyI. Duijnstee
  • Geography, Environmental Science
    International Journal of Plant Sciences
  • 2020
Together, these three new conifer taxa increase both the taxonomic diversity and the morphological disparity among both reproductive and vegetative structures in late Paleozoic voltzian conifers and once more illustrate that structural evolution, innovation, and diversification in this conifer group took place in more extrabasinal environments, where chances of preservation are unlikely.

ABOUT THE ORIGIN OF CYCADS AND SOME ENIGMATIC ANGIOSPERM-LIKE FRUCTIFICATIONS FROM THE EARLY-MIDDLE TRIASSIC (ANISIAN) BRAIES DOLOMITES (NORTHERN ITALY)

The fossil record of Cycadales and early Angiosperm-like fructifications is fragmentary and the author has recovered large quantities of well-preserved cycadalean remains and other enigmatic strobili and fructification from Early Middle to Middle Triassic (Anisian) sediments, making it possible to view their unusual story in a new light.

The last Patagonian cycad, Austrozamia stockeyi gen. et sp. nov., early Eocene of Laguna del Hunco, Chubut, Argentina1

A large frond piece and several isolated leaflets of a compressed cycad, along with an associated spiny petiole, from the late-Gondwanan flora of Patagonia, Argentina are reported.

The diversity of Australian Mesozoic bennettitopsid reproductive organs

The extremely low representation of reproductive organs vis-à-vis foliage is interpreted to reflect a combination of physical disintegration of the seed-bearing units while attached to the host axis and, potentially, extensive vegetative reproduction in bennettopsids growing at high southern latitudes during the Mesozoic.

Michael Wachtler : About the Origin of Cycads ABOUT THE ORIGIN OF CYCADS AND SOME ENIGMATIC ANGIOSPERM-LIKE FRUCTIFICATIONS FROM THE EARLY-MIDDLE TRIASSIC ( ANISIAN )

The fossil record of Cycadales and early Angiosperm-like fructifications is fragmentary. Many of our efforts to understand the evolution of this enigmatic plant group are hampered by the poor fossil

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