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

Plant Fossil Names Registry Number: PFN000291

Act LSID: urn:lsid:plantfossilnames.org:act:291

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

Types

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.

Etymology

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

Stratigraphy

Paleogene, Paleocene
Fort Union Formation, late Palaeocene

Locality

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