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Cordaitanthus thompsonii
Cordaitanthus thompsonii Fry J. Paleontol., 30(1): 39. 28 Feb 1956
- Name
- Cordaitanthus thompsonii
- Rank
- Species
- Original spelling
- thompsoni
- Generic Name
- [Genus] Cordaitanthus
- Authors (Pub.)
- Fry W. L.
- Publication
- New Cordaitean cones from the Pennsylvanian of Iowa [1956/2]
- Journal
- Journal of Paleontology
- Volume
- 30
- Issue
- 1
- Page number
- 39
- Year
- 1956
- Fossil Status
- fructifications (male)
- Stratigraphy
- Moscovian
- Strat. comment
- Desmoinesian
- Location
- Atlas Mines, Mahaska County, Iowa, USA
- Paleoregion
- Laurussia (Laurentia)
Data for Holotypus
- Repository
- Cornell University, lthaca, New York, USA
- Repository Number
- A-634.1-4; A-634.1-10; A-634.1-58
- Diagnosis
- Male cordaitean cones with preserved portion 3.2 cm. long. Secondary fertile shoots 6.8 mm. long X4.5 mm. broad borne in two rows along the primary fertile branch axis. Individual shoots widely spaced never coming in contact with one another. Appendages not exceeding 40. Sterile appendages of two types: sheathing and acicular. Sheathing appendages 3.0 mm. X3.6 mm. Acicular appendages to 4.0 mm. long. Xylem strand of primary fertile axis in two flattened parts and made up of radially arranged elements. Xylem strand of secondary fertile shoots siphonestelic to dictyostelic. Pith zone typically hollow or fragmentary. Numerous microsporangia on microsporophylls clustered at apices of secondary fertile shoots. Wall of microsporangia one to two cell layers thick, cells of which average 28.0 X45.0 A. Diameter of microsporangia 150-210 I. Sporangia clustered at apex of secondary fertile shoot.
Nomenclatural synonyms (basionyms)
Species
