Also found in: Thesaurus, Wikipedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Cordaites - tall Paleozoic trees superficially resembling modern screw pinesCordaites - tall Paleozoic trees superficially resembling modern screw pines; structurally intermediate in some ways between cycads and conifers
gymnosperm genus - a genus of gymnosperms
Cordaitaceae, family Cordaitaceae - chiefly Paleozoic plants; Cordaites is the chief and typical genus
References in periodicals archive ?
gigas, Sphenophyllum thonii) are very diversified in the first but absent in the red sediments; similarly the callipterids with small pinnules (Arnhardtia mouretii, Gracilopteris strigosa, Rhachiphyllum schenkii), but also Odontopteris subcrenulata, Cordaites borassifolius and Poacordaites which were extending from the basal Autunian into the grey sediments of the Transition zone become absent in the red sediments.
The contact represents an angular unconformity in the subsurface (Waldron and Rygel 2005) and records a pronounced biostratigraphic break marked by the appearance of Cordaites macroflora and the incoming of the cordaitalean prepollen Florinites (Calder 1998; Utting and Wagner 2005; Utting et al.
Rudolph Florin on the evolution of the vegetative and reproductive structures of the cordaites and early conifers.
Dawson, 'consists principally of the flattened bark of Sigillarioid and other trees, intermixed with leaves of Ferns and Cordaites, and other herbaceous debris, and with fragments of decayed wood, constituting 'mineral charcoal', all these materials having manifestly alike grown and accumulated where we find them'.
Floated plant remains, most commonly Cordaites leaves and Calamites stem and foliage remains, are found on the bedding planes of these ash fall deposits.
Unfragmented Cordaites leaves, up to 22 cm in length, are common locally in red mudrock beds and channel sandstone bodies.
Most paleobotanists think that conifers either evolved from cordaites or share an ancestor with them (Clement-Westerhof, 1988).
Cuticular studies of Cordaites leaves from North America and Europe (Simunek 2000; Zodrow et al.
In effect, this work introduced chemotaxonomic utility into Carboniferous plant determinations, and it is currently extended to cordaites as well, with encouraging results (Zodrow et al.