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Cordaianthus duquesnensis
Cordaianthus duquesnensis G.W. Rothwell Amer. J. Bot., 69(2): 240. 5 Mar 1982
- Name
- Cordaianthus duquesnensis
- Rank
- Species
- Generic Name
- [Genus] Cordaianthus
- Authors (Pub.)
- Rothwell G. W.
- Publication
- Cordaianthus duquesnensis sp. nov., anatomically preserved ovulate cones from the Upper Pennsylvanian of Ohio [1982/3]
- Journal
- American Journal of Botany
- Volume
- 69
- Issue
- 2
- Page number
- 240
- Year
- 1982
- Fossil Status
- fructifications
- Stratigraphy
- Upper Pennsylvanian
- Strat. comment
- Conemaugh Group
- Location
- South side of Ohio Route 22 (NE1/4 SE1/4 SE1/4, Sec. 6, Wayne Township, Jefferson County) approximately 8 km west of Steubenville, Ohio, USA
- Paleoregion
- Laurussia (Laurentia)
Data for Holotypus
- Repository
- Field Museum, Chicago, USA
- Repository Number
- OUP 2755, 2757, 2760-2763, 2768, 2820 [coal ball 1,387 C(1) Side]
- Diagnosis
- Ovulate cordaitean cones consisting of shoots up to 5.5 mm long and 2.2 mm in diameter, with 60-70 spirally arranged scales. Basal scales distantly spaced, more distal scales compactly disposed. Distalmost 25-30 scales fertile, each bearing either a single terminal ovule or exhibiting a flared and raggedly concave tip. In cross section, sterile scales are oval or crescent-shaped and fertile scales are stellate. Axis with longitudinally disposed ribs; stele of radially aligned tracheids surrounding a pith proximally, becoming increasingly dissected and forming up to eight sympodia distally. Immature and abortive platyspermic ovules with prominent wings in the major plane; nucellus fused to integument at chalaza, free distally. Mature fertile scales elongated beyond the tips of vegetative scales. Primary axis and more mature ovules unknown.
Nomenclatural synonyms (basionyms)
Species
