Palmoxylon subantarcticae L.C.A.Martínez et Leppe in Martínez, Leppe, Manríquez, Pino, Trevisan, Manfroi & Mansilla

Plant Fossil Names Registry Number: PFN003129

Act LSID: urn:lsid:plantfossilnames.org:act:3129

Authors: L. C. A. Martínez & M. Leppe

Rank: species

Reference: Martínez, L. C. A., Leppe, M., Manríquez, L. L.M., Pino, J. P., Trevisan, C., Manfroi, J. & Mansilla, H. (2023): A unique Late Cretaceous fossil wood assemblage from Chilean Patagonia provides clues to a high-latitude continental environment. – Papers in Palaeontology 9(6): 1–45., link

Page of description: 17

Illustrations or figures: Fig. 9

Types

Original diagnosis/description

Fragment of stem composed of ground and tabular parenchyma cells and scattered fibrovascular bundles. Ground parenchyma of rod-like and slightly elongated cells, with intercellular spaces (lacunae). Tabular parenchyma 1 to 3 cells wide, sheathing the fibrovascular bundles. Solitary circular fibrous bundles in the central zone. Stegmatas with spherical echinate silica-bodies in axial series. Fibrovascular bundles irregularly distributed, composed of a fibrous zone (sclerenchyma), vascular zone, and fibrous ventral cap. Fibrous zone reniforme, auricular sinus rounded, and occasionally absent. Vascular zone with one phloem strand, protoxylem vessels, and 3 (1–6) Metaxylem vessels, with scalariform perforation plates and tyloses.

Etymology

The specific name is derived from the Latin prefix ‘sub’ (almost), and the noun ‘antarcticae’ (genitive of Antarctica).

Stratigraphy

Cretaceous, Upper Cretaceous, Maastrichtian
Austral Basin, Dorotea Formation.

Locality

Chile
El Puesto, Las Chinas River Valley, Magallanes Region, Chile.