Weylandiella

Name

Weylandiella

Rank

Genus

Authors (Pub.)

Doweld A. B.  

Publication

Palaeoflora Europaea: Notulae Systematicae ad Palaeofloram Europaeam spectantes III [2024/11]

Journal

Geophytology

Volume

54

Issue

2

Page number

128

Year

2024

Parent Taxon

[Order] Theales

Fossil Status

leaves

Type

Weylandiella rhenana

Diagnosis

Leaves simple, lanceolate, entire-margined, 23 mm wide, much more than 80 mm long, apex not known, base narrow cuneate (incompletely known), venation pinnate, poorly preserved, midrib straight and strong, secondaries very thin, faintly visible, dense, moderately steep, higher-order venation reticulate, tertiaries forming elongate meshes subparallel with secondaries. Adaxial cuticle thick, finely granulate, not striated, ordinary cells polygonal-lobate, 20-35 μm across, anticlines deeply coarsely wavy, no trichome or trichome bases observed; abaxial cuticle distinctly striate, concentrically around stomata, irregularly over non-stomatal cells, ordinary cells polygonal, about 18-30 μm across, anticlines wavy; stomata broadly elliptical to rounded, anisocytic to cyclocytic, guard cells 27-30 μm long, surrounded by usually 3 narrow subsidiary cells covered heavily by striation, distinct cutin ring about 3 μm thick completely surrounding broadly elliptic front cavity, pore narrow, slit-like, very thin polar T-pieces.