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Franhueberia gerriennei
Franhueberia gerriennei L.A. Hoffm., Tomescu Amer. J. Bot., 100(4): 755. 26 Mar 2013
- Name
- Franhueberia gerriennei
- Rank
- Species
- Generic Name
- [Genus] Franhueberia
- Authors (Pub.)
- Hoffman L. A.
Tomescu A. M. F.
- Publication
- An early origin of secondary growth: Franhueberia gerriennei gen. et sp. nov. from the Lower Devonian of Gaspé (Quebec, Canada) [2013/3]
- Journal
- American Journal of Botany
- Volume
- 100
- Issue
- 4
- Page number
- 755
- Year
- 2013
- Fossil Status
- stems
- Stratigraphy
- Emsian
- Strat. comment
- Battery Point Formation
- Location
- South shore of Gaspé Bay, in the vicinity of Douglastown, Quebec, Canada
- Paleoregion
- Laurussia (Laurentia)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- 558725 (fi eld specimen no. F. M. Hueber 65-6/B21), slab E; specimen peeled entirely—peel numbers Eb 1–230, E(2)s 1–130; microscope slides mounted from numbers Eb 21, Eb 28–150, E(2)s 1–76
- Diagnosis
- Axis xylem ca. 1.9 mm in diameter. Protostele ca. 0.5 mm in diameter. Protoxylem tracheids 8 μm in diameter. Metaxylem tracheids 7–15 μ m in diameter. Pitting round to oval, bordered, 4.4–6.6 μ m in diameter. Secondary xylem tracheids rectangular in cross section, 8.4–28.5 μ m wide tangentially, 21.6–40.8 μ m radially; scalariform bordered pits on tangential and radial tracheid walls, width same as that of tracheids, height 3.4–9.6 μ m, separated by horizontal thickenings 1.4–3.4 μ m across. Pit membranes with multiple apertures ca. 3 μ m diameter, in one or two rows. Rays frequent, narrow (9–12 μ m) and 90 μ m to >150 μ m tall.
