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Bombacoxylon langstonii
Bombacoxylon langstonii E.A. Wheeler, T.M. Lehman I.A.W.A. J., 21(1): 90. 2000
- Name
- Bombacoxylon langstonii
- Rank
- Species
- Original spelling
- langstoni
- Generic Name
- [Genus] Bombacoxylon
- 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
- 90
- 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 507018 (RM 11-4)
Data for Paratypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 507019 (RM 11-2), USNM 507020 (RM 11-3), USNM 507021 (RM 11-8)
- Diagnosis
- Growth rings indistinct, marked by radially lattened ibres.
Diffuse-porous; vessels solitary and in short radial multiples of 2– 4; 17–31% solitary;
mean tangential diameters 95 (18)–119 (27) μm; 8–16 per mm2; mean vessel
element lengths 337 (34)–575 (126) μm; exclusively simple perforations; crowded
alternate intervessel pits, 8–11 μm across; vessel-ray parenchyma pits of similar size
as intervessel pits and throughout the ray, not restricted to the marginal rows; thinwalled
bubble-like tyloses common.
Axial parenchyma abundant diffuse and diffuse-in-aggregates, up to 8 cells per
strand.
Rays: multiseriate rays 2–5, mostly 3, cells wide, 33 (8)–57 (15) μm; heterocellular
with body of multiseriate rays composed entirely of procumbent cells with 1–2
rows of square to slightly upright cells to sub-homocellular composed entirely of
procumbent cells with ill-deined marginal rows; in tangential view some rays tending
to have two distinct sizes of ray cells, but in radial view no obvious tile cells
visible; multiseriate ray heights 319 (93)–383 (226) μm; uniseriate rays extremely
rare; rays not storied; 6–13, mostly 9–11 per mm.
Fibres: pits not distinguishable; walls medium-thick.
Inclusions: solitary prismatic crystals sometimes present, rare in marginal ray cells.
