Reynoldsiophyllum

Name

Reynoldsiophyllum

Rank

Genus

Authors (Pub.)

Upchurch G. R., Jr. Dilcher D. L.  

Publication

Cenomanian angiosperm leaf megafossils, Dakota Formation, Rose Creek locality, Jefferson County, southeastern Nebraska [1990/12]

Journal

Bulletin of the United States Geological Survey

Issue

1915

Page number

37

Year

1990

Parent Taxon

[Order] Chloranthales

Fossil Status

leaves

Type

Reynoldsiophyllum masonii

Diagnosis

Leaf simple; base acute; petiole poorly differentiated from blade, less than 1 em long; margin broadly crenate and with mechanical reinforcement. Primary venation pinnate. Secondary venation festooned brochidodromous; secondary veins zig-zag to sinuous in course; intercostal regions somewhat elongate exmedially but never more than several times as tall as broad exmedial margins of the intercostal regions poorly demarcated by the secondary veins. Tertiary venation irregularly reticulate; tertiary veins thick relative to secondary veins, with a zig-zag course, dividing each intercostal region into a series of segments. Quaternary venation poorly differentiated from the tertiary venation, reticulate. Larger crenations typically with a medial vein and sometimes with a pair of accessory veins that converge on the margin and fuse with the thickening at the tooth apex.