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Tainioxyla quebecana
Tainioxyla quebecana Bickner, Tomescu I.A.W.A. J., 2019, 20(3)(10.1163/22941932-40190234): [14]. Jan 2019
- Name
- Tainioxyla quebecana
- Rank
- Species
- Generic Name
- [Genus] Tainioxyla
- Authors (Pub.)
- Bickner M. A.
Tomescu A. M. F.
- Publication
- Structurally complex, yet anatomically plesiomorphic: permineralized plants from the Emsian of Gaspé (Quebec, Canada) expand the diversity of Early Devonian euphyllophytes [2019/1]
- Journal
- IAWA Journal
- Annee/Jahrgang
- 2019
- Volume
- 20(3)
- Issue
- 10.1163/22941932-40190234
- Page number
- [14]
- Year
- 2019
- Fossil Status
- stems (wood)
- Stratigraphy
- Emsian
- Strat. comment
- Battery Point Formation
- Location
- vicinity of Douglastown, south shore of Gaspé Bay, Quebec, Canada
- Paleoregion
- Laurussia (Laurentia)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- Axis in slab USNM 557790-1 B (slides Btop series b)
Data for Paratypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- Axis in slab USNM 557820-1 C (slides Cbot series d)
- Diagnosis
- Small axes (c. 2 mm wide) oval in cross section. Primary xylem
a bar-shaped protostele >1 mm wide. Several mesarch protoxylem strands present
close to stele tips and along xylem midline. Metaxylem tracheids of widely variable
diameter up to >100 μm wide, with angular outline and Psilophyton-type secondary
wall thickenings. Secondary growth present. Inner cortex parenchymatous, wide to
narrower. Outer cortex thinner, primarily sclerenchymatous, houses bell-shaped substomatal
chambers. Epidermal cells small, isodiametric to radially elongated (in cross
sections), often sclerified.
