Leptocentroxyla tetrarcha

Name

Leptocentroxyla tetrarcha

Rank

Species

Generic Name

[Genus] Leptocentroxyla

Authors (Pub.)

Bickner M. A. Tomescu A. M. F.  

Publication

Structurally complex, yet anatomically plesiomorphic: permineralized plants from the Emsian of Gaspé (Quebec, Canada) expand the diversity of Early Devonian euphyllophytes [2019/1]

Journal

IAWA Journal

Annee/Jahrgang

2019

Volume

20(3)

Issue

10.1163/22941932-40190234

Page number

[7]

Year

2019

Fossil Status

stems (wood)

Stratigraphy

Emsian

Strat. comment

Battery Point Formation

Location

vicinity of Douglastown, south shore of Gaspé Bay, Quebec, Canada

Paleoregion

Laurussia (Laurentia)

Data for Holotypus

Repository

National Museum of Natural History, Smithsonian Institution, Washington, USA

Repository Number

Axis in slabs USNM 557820-3 A and B (slides Abot series d and Bbot series f ).

Num

figs. 1-5

Pub.

Structurally complex, yet anatomically plesiomorphic: permineralized plants from the Emsian of Gaspé (Quebec, Canada) expand the diversity of Early Devonian euphyllophytes [2019/1]

Diagnosis

Small axes (c. 2 mm diameter) circular-subcircular in cross section. Primary xylem c. 1.1 mm across, a four-ribbed actinostele, with thick diamondshaped central area and slender ribs. Conspicuous mesarch protoxylem strands at rib tips. Metaxylem tracheids up to 60 μm wide, with angular, polygonal outlines and Psilophyton-type secondary wall thickenings, except for the central area with thinner-walled, scalariform tracheids. Inner cortex wide, parenchymatous, with groups of large sclerenchyma forming a discontinuous layer around the xylem. Outer cortex thin, primarily sclerenchymatous. Epidermis of radially flattened parenchyma.