Pistacia terrazasae E.A.Wheeler et Manchester

Plant Fossil Names Registry Number: PFN002712

Act LSID: urn:lsid:plantfossilnames.org:act:2712

Authors: E. A. Wheeler & S. R. Manchester

Rank: species

Reference: Wheeler, E. A. & Manchester, S. R. (2022): A diverse assemblage of Late Eocene woods from Oregon, western USA. – Fossil Imprint 77(2): 299–329.

Page of description: 300

Illustrations or figures: text-fig. 1a–i

Types

Original diagnosis/description

Growth rings distinct. Wood ring-porous with a narrow earlywood zone, mostly 1 pore deep, earlywood vessels not contiguous; latewood vessels predominantly in radial multiples, some in clusters. Helical thickenings present. Perforation plates exclusively simple. Intervessel pitting alternate. Vessel-ray parenchyma pits with reduced borders, rounded to oval in outline. Fibers non-septate. Axial parenchyma not common, scanty paratracheal. Radial canals present. Rays heterocellular with a few marginal rows of square to upright cells. Crystals in marginal ray parenchyma cells.

Etymology

Named for Teresa Terrazas to acknowledge her comprehensive treatment of the wood anatomy of the Anacardiaceae.

Stratigraphy

Paleogene, Eocene
John Day Formation

Locality

United States
UF 279, about 3 km east of Post, Crook County, Oregon