Cobbania Stockey, Rothwell et K.R.Johnson

Plant Fossil Names Registry Number: PFN001936

Act LSID: urn:lsid:plantfossilnames.org:act:1936

Authors: R. A. Stockey, G. W. Rothwell & K. R. Johnson

Rank: genus

Reference: Stockey, R. A., Rothwell, G. W. & Johnson, K. R. (2007): Cobbania corrugata gen. et comb. nov. (Araceae): A floating aquatic monocot from the Upper Cretaceous of western North America. – American Journal of Botany 94(4): 609–624.

Page of description: 611

Type

Original diagnosis/description

Floating aquatic plants with rosettes of trumpet-shaped leaves helically arranged around short stem and numerous elongate roots bearing fine lateral roots. Stems connected by stolons. Leaves pubescent, with inflated base and circular rim with apical notch. Petiole bases clasping, sheath present. Primary veins branch to form adaxial and abaxial series. Adaxial primary veins dichotomize and anastomose; lateral veins branching to form collective veins in rim that meet in of just below apical notch. Secondary veins anastomose, forming tertiary veins at right angles. Quaternary veins form polygonal areolae with freely ending veinlets. Marginal veins in rim at least three, including collective vein and fimbrial vein, connected by a series of short secondary veins.

Etymology

For William A. Cobban of the United States Geological Survey whose life work studying the ammonite biostratigraphy of the Cretaceous Western Interior Seaway has set an unparalleled stratigraphic framework for future study.