Icacinoxylon pittiense, a new species of angiospermous wood from the Lower Cretaceous Cedar Mountain Formation of Utah is described and compared with similar fossil and modern woods. It is distinguished from other species of Icacinoxylon by its thick-walled fiber-tracheids with their walls making up at least 50% of the total diameter of the cells, conspicuous bordered pits with obliquely crossing extended apertures on both the tangential and radial walls of its fiber-tracheids, scalariform perforation plates with as few as four or greater than 30 bars, transitional opposite to scalariform pitting on its vessel walls, thick-walled ray cells, and distinct sheath or border cells in its rays. Icacinoxylon pittiense is the first species of this genus to be reported from Cretaceous sediments. This wood is of special interest because very few angiosperm woods have been reported from lower Cretaceous strata.
Original Publication Citation
Flora of the Lower Cretaceous Cedar Mountain Formation of Utah and Colorado Part III, Icacinoxylon pittiense n. sp. G. F. Thayn, W. D. Tidwell, and W. L. Stokes American Journal of Botany (February 1985), 72(2):175-18
BYU ScholarsArchive Citation
Tidwell, William D.; Thayn, Gregory F.; and Stokes, W. L., "Flora of the Lower Cretaceous Cedar Mountain Formation of Utah and Colorado; Part III, Icacinoxylon pittiense n. sp." (1985). Faculty Publications. 1451.
Botanical Society of America
Physical and Mathematical Sciences
© 1985 Botanical Society of America;
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