A New Definition and a Lectotypification of the Genus Cooksonia Lang 1937

@article{Gonez2010AND,
  title={A New Definition and a Lectotypification of the Genus Cooksonia Lang 1937},
  author={Paul Gonez and Philippe Gerrienne},
  journal={International Journal of Plant Sciences},
  year={2010},
  volume={171},
  pages={199 - 215}
}
The genus Cooksonia Lang 1937 includes some of the earliest land plants. Specimens of Cooksonia pertoni Lang 1937 are considered the earliest Eutracheophytes. The definition of the genus is thus central to the delineation of the clade. However, the generic diagnosis is problematic. It is not restrictive enough, and most of the few diagnostic characters are plesiomorphic. Observations on new specimens of Cooksonia paranensis Gerrienne et al. 2001, a species very close to C. pertoni, considered… Expand
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References

SHOWING 1-10 OF 41 REFERENCES
New Silurian cooksonias from dolostones of north-eastern North America
TLDR
The Laurentian assemblage of Ontario and New York State is less diverse and disparate than coeval assemblages, which are also preserved in marine rocks, and its preservation in limestones may have been facilitated by the hypersalinity inferred from various sedimentary features. Expand
An exceptional specimen of the early land plant Cooksonia paranensis, and a hypothesis on the life cycle of the earliest eutracheophytes
TLDR
This fossil is evidence that reduced thalloid gametophytes and branched axial sporophytes are plesiomorphic among the earliest eutracheophytes, and it is suggested that a major difference in life cycle defines a basal dichotomy in tracheophyte. Expand
A late Wenlock flora from Co. Tipperary, Ireland
TLDR
It is concluded that these plants provide the earliest record of erect fertile land plants of possible pteridophyte affinity and sedimentological and palaeontological studies of the region provide little direct evidence for the habitats of the plants which are considered to have been terrestrial. Expand
Further Notes on Lower Devonian Plants from South Wales
  • A. Heard
  • Geology
  • Quarterly Journal of the Geological Society of London
  • 1939
In 1926 I recorded the occurrence of a Lower Devonian flora from the Senni Beds near Brecon, and described one new genus, Gosslingia, in detail. In 1931 a “thalloid-like” plant, Thallomia, from theExpand
An Early Devonian flora, including Cooksonia, from the Paraná Basin (Brazil)
We report here the presence of an extensive flora from an early Lochkovian (Lower Devonian: ∼406 million years) locality in the Parana Basin (Brazil). The exceptional macrofossil assemblage includesExpand
Renalia hueberi, a new plant from the lower Devonian of Gaspé
TLDR
Renalia hueberi is interpreted however as being evolved from Cooksonia -like plants, and exhibits a sporangial position most comparable to that of the rhyniophytes and a mode of dehiscence characteristic of zosterophylls. Expand
Plant assemblages from the Silurian of southern Bolivia and their palaeogeographic significance
TLDR
Their overall morphological grade is closer to material collected from circum-northern Atlantic localities than from assemblages in Australia and Kazakhsta/nChina, which translates into floristic similarities between Gondwanan high latitudes and equatorial Laurussia rather than with low latitude, north-eastern Gondwana or with a low latitude Kazakhstan/ Xinjiang micro-palaeocontinent. Expand
New perspectives on Cooksonia from the Lower Devonian of the Welsh Borderland
TLDR
It is concluded that spores of such simple morphology may have been produced by a variety of taxa and that ultrastructural studies are necessary to confirm this possibility. Expand
A new rhyniopsid with novel sporangium organization from the Lower Devonian of South Wales
Re-investigation of permineralized plants originally called Cooksonia sp. from the Lower Old Red Sandstone (Siegenian) of Gwent, S. Wales shows them to be rhyniopsids with simple isotomous branchingExpand
The lower Devonian flora of the Senni Beds of Monmouthshire and Breconshire
  • W. Croft, W. H. Lang
  • Biology
  • Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
  • 1942
TLDR
New fossil localities, of which the most important is Llanover Quarry, are recorded from the Senni Beds of the Lower Old Red Sandstone of Monmouthshire and Breconshire, and a distinction of two subgenera within the genus Zosterophyllum is suggested. Expand
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