Sequoioxylon carneyvillense Long Li, J.H.Jin et Manchester

Plant Fossil Names Registry Number: PFN000291


Authors: L. Li, J. H. Jin & S. R. Manchester

Rank: species

Reference: Li, L., Jin, J. -H. & Manchester, S. R. (2018): Cupressaceae fossil remains from the Paleocene of Carneyville, Wyoming. – Review of Palaeobotany and Palynology 251: 1–13.

Page of description: 4

Illustrations or figures: pl. I


Original diagnosis/description

Growth rings distinct with abrupt transition fromearlywood to latewood; circular bordered pits on radial tracheid walls uni- to triseriate, predominantly biseriate, opposite; notched pits present; circular bordered pits uni- and biseriate rarely present on tangential tracheid walls. Cross-field pits exclusively taxodioid, circular to oval, 1–4 pits per cross-field, arranged in one or two seriate; axial parenchyma diffuse, horizontal walls of parenchyma cells smooth, cells containing dark deposits; rays uniseriate, sometimes partially biseriate to occasionally partially triseriate; both horizontal and tangential walls of ray cells smooth; ray tracheids absent; resin ducts not observed.


The specific name refers to “Carneyville” the former town near the site name where the fossils were collected.


Paleogene, Paleocene
Fort Union Formation, late Palaeocene


United States
specimens were collected in a road cut of the highway near Carneyville, Wyoming, UF locality 19382, 44°55.130′ N, 106°56.524′ W

Plant fossil remain

fossil wood


Use comments to notify PFNR administrators of mistakes or incomplete information relevant to this record.