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Ankyropteris glabra
Ankyropteris glabra R.W. Baxter Amer. J. Bot., 38(6): 449. 31 Jul 1951
- Name
- Ankyropteris glabra
- Rank
- Species
- Generic Name
- [Genus] Ankyropteris
- Authors (Pub.)
- Baxter R. W.
- Publication
- Ankyropteris glabra, a new American species of the Zygopteridaceae [1951/7]
- Journal
- American Journal of Botany
- Volume
- 38
- Issue
- 6
- Page number
- 449
- Year
- 1951
- Fossil Status
- stems (with branches)
- Stratigraphy
- Middle Pennsylvanian
- Strat. comment
- Petersburg or Alum Cave (Indiana No. 5 Coal)
- Location
- open pit coal mine (Wasson Coal Mining Co.) about 10 mi. north of
Booneville, in the northern part of Warrick County, Indiana, USA
- Paleoregion
- Laurussia (Laurentia)
Data for Holotypus
- Repository
- Natural History Museum, Kansas University, Lawrence, Kansas, USA
- Repository Number
- Slides 150 [fig. 1], 151 [fig. 15]
- Diagnosis
- Stem oval in transverse section, approximately 14 mm. X 9 mm., a five lobed actinostele consisting of a pentarch network of small tracheal cells surrounded by much larger metaxylem cells. Cortex consisting of a narrow inner zone of thick walled resinous cells and a broad outer zone of thin-walled parenchyma; numerous aphlebiae; surface of plant glabrous. Phyllophore of the Etapteris (Ankyropteris) di-upsilon type. Axillary branch stele arising from the stem approximately 8 mm. to 1 cm. above the departure of the phyllophore trace.
Nomenclatural synonyms (basionyms)
Species
