The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2022

IDNAME urn:idName:ifpni.org:species:A4A334F8-9388-439F-9B54-4ACFE0FC05BB species
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Cordaites validus

Cordaites validus Cohen, Delev. Amer. J. Bot., 46(7): 547. 28 Jul 1959
Name
Cordaites validus
Rank
Species
Generic Name
[Genus] Cordaites
Authors (Pub.)
Cohen L. M. Delevoryas T.  
Publication
An occurrence of Cordaites in the Upper Pennsylvanian of Illinois [1959/7]
Journal
American Journal of Botany
Volume
46
Issue
7
Page number
547
Year
1959
Fossil Status
stems (wood)
Stratigraphy
Pennsylvanian
Location
E Calhoun, Richland County, Illinois, USA
Paleoregion
Laurussia (Laurentia)
Data for Holotypus
Repository
Yale Peabody Museum of Natural History, New Haven, USA
Repository Number
Coal ball 40
Diagnosis
Stem with endarch primary xylem throughout the stele, protoxylem bordering on vertical rows of large parenchyma cells 50-60t in diameter, small pith cells associated with a vascular bundle forming a crescent-shaped mass internal to the large paren- chyma cells and primary xylem. Primary xylem annular, spiral, and scalariform in a narrow tran- sition zone. Secondary xylem with tracheids hav- ing circular bordered pitg on their radial walls; bordered pits usually uniseriate, seldom more than biseriate; rays uniseriate, usually 1-2 cells in height; pitting on tracheid-ray cell contact faces in clusters; borders on tracheid side narrower than those of ordinary bordered pits. Endarch leaf trace undivided at edge of pith, dividing into several strands in cortex and leaf base.
Nomenclatural synonyms

Species

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