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

  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},
  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… 

Yarravia oblonga Lang & Cookson, 1935 emended, from the Lower Devonian of Victoria, Australia

Abstract Yarravia oblonga is emended here and adds to our knowledge of floral diversity during the late Silurian and Early Devonian of central Victoria, Australia. Examination of specimens and

Early Silurian (mid-Sheinwoodian) palynomorphs from the Loděnice-Špičatý vrch, Prague Basin, Czech Republic

Dispersed spores, cryptospores, scolecodonts, acritarchs, prasinophytes and chitinozoans, dated by graptolites as being middle Sheinwoodian (early Wenlock, ca 432 Ma), are described from the

An early Devonian flora from the Baviaanskloof Formation (Table Mountain Group) of South Africa

This flora is furthermore remarkable for the large number of complete or sub-complete specimens allowing good understanding of earliest plant architecture, which represents the oldest known from Africa.

Two new genera of early Tracheophyta (Zosterophyllaceae) from the upper Silurian–Lower Devonian of Victoria, Australia

Abstract Two diminutive new taxa of the family Zosterophyllaceae, Parazosterophyllum timsiae gen. et sp. nov. and Gippslandites minutus gen. et sp. nov., are described from the upper Silurian–Lower

Teruelia diezii gen. et sp. nov.: an early polysporangiophyte from the Lower Devonian of the Iberian Peninsula

A new basal land plant, Teruelia diezii gen. et sp. nov., is described from the shallow‐water marine deposits of the Lower Devonian (Lochkovian–Pragian) Nogueras Formation of the Iberian Peninsula

Notes on a fertile rhyniophytoid from the Lower Devonian of Guangxi, southwestern China

A fertile rhyniophytoid is discovered from the Lower Devonian of Guangxi, southwestern China, which is characterised by small size, dichotomous branchings and terminal sporangia. This plant is



New Silurian cooksonias from dolostones of north-eastern North America

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.

A late Wenlock flora from Co. Tipperary, Ireland

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.

Further Notes on Lower Devonian Plants from South Wales

  • A. Heard
  • Environmental Science
    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 the

Plant assemblages from the Silurian of southern Bolivia and their palaeogeographic significance

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.

New perspectives on Cooksonia from the Lower Devonian of the Welsh Borderland

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.

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 branching

The lower Devonian flora of the Senni Beds of Monmouthshire and Breconshire

  • W. CroftW. H. Lang
  • Environmental Science
    Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
  • 1942
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.