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AGATHOXYLON LEMONII SP. NOV., FROM THE DAKOTA FORMATION, UTAH

William D. Tidwell and Gregory F. Thayn
The Great Basin Naturalist
Vol. 46, No. 3 (31 July 1986), pp. 559-566
Stable URL: http://www.jstor.org/stable/41712270
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
AGATHOXYLON LEMONII SP. NOV., FROM THE DAKOTA FORMATION, UTAH
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Abstract

Petrified wood specimens from the Dakota Formation of Utah are here described as Agathoxylon lemonii . This new species is characterized by having distinct growth rings, araucarian tracheary pitting, resin plates or plugs in its tracheids, abundant axial parenchyma, low uniseriate rays and 1–4 small, slightly bordered pits with circular to oval included apertures per crossfield. This is the first report of petrified wood from the Dakota Formation of the western United States and the first record of Agathoxylon from North America.

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