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Pageoxylon cretaceum
Pageoxylon cretaceum E.A. Wheeler, T.M. Lehman I.A.W.A. J., 21(1): 93. 2000
- Name
- Pageoxylon cretaceum
- Rank
- Species
- Generic Name
- [Genus] Pageoxylon
- Authors (Pub.)
- Wheeler E. A.
Lehman T. M.
- Publication
- Late Cretaceous woody dicots from the Aguja and Javelina Formations, Big Bend National Park, Texas, USA [2000]
- Journal
- IAWA Journal
- Volume
- 21
- Issue
- 1
- Page number
- 93
- Year
- 2000
- Fossil Status
- stems (wood)
- Stratigraphy
- Campanian
- Strat. comment
- Aguja Formation / Lower Shale Member
- Location
- Big Bend National Park, Texas, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 507022 (RM 13-6)
- Diagnosis
- Growth rings faint, marked by radially lattened ibres.
Diffuse-porous; vessels solitary and in radial multiples of 2– 4; with a tendency to
form radial chains; mean tangential diameter 86 (13) μm, range 62–106 μm; 17–38
per mm2; mean vessel element length 1089 (234) μm, range 746–1424 μm; scalariform
perforation plates, 4–16, mostly 8–12 bars, 5–9 μm between bars; alternate to opposite
intervessel pits, crowded and polygonal and also not crowded, usually 8 μm across;
vessel-ray parenchyma pits of similar size as intervessel pits, but with reduced borders;
occasional thin-walled tyloses.
Axial parenchyma diffuse and diffuse-in-aggregates, abundant, 6–8 cells per strand.
Rays 1–3 cells wide, procumbent ray cells rare, mostly upright cells twice as high
as wide, multiseriate rays only 2–3-seriate for a short distance and markedly heterocellular
with few procumbent cells and many rows of square to upright cells; uniseriate
rays common, and composed exclusively of upright cells; not storied; 8–15 per mm.
Fibres: pits not distinguishable; thick walls.
Inclusions: solitary prismatic crystals common in ray cells, 1– 3 per cell.
