Kvacekispermum E.M.Friis, P.R.Crane et K.R.Pedersen

Plant Fossil Names Registry Number: PFN000106

Act LSID: urn:lsid:plantfossilnames.org:act:106

Authors: E. M. Friis, P. R. Crane & K. R. Pedersen

Rank: genus

Reference: Friis, E. M., Crane, P. R. & Pedersen, K. R. (2018): Rightcania and Kvacekispermum: Early Cretaceous seeds from eastern North America and Portugal provide further evidence of the early chloranthoid diversification. – Fossil Imprint 74(1–2): 65–76.

Page of description: 71


Kvacekispermum rugosum E.M.Friis, P.R.Crane et K.R.Pedersen

Original diagnosis/description

Seeds broadly obovate in lateral view and almost circular in transverse section with coarsely rugulate to reticulate surface formed from the uneven outer surface of endotesta in which the depressions are arranged in poorly defined grooves. Stigmatic area sessile on the fruit apex, slightly raised, hemispherical. Ovule pendent, orthotropous, bitegmic, endotestal. Endotesta comprised of a single layer of palisade-shaped cells with densely spaced crystals and fibrous infillings. Tegmen crushed in mature seeds. Embryo tiny; nutritive tissue of isodiametric thin-walled cells.


The name Kvacekispermum is in honor of Zlatko Kvaček for his numerous contributions to palaeobotany.

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Names associated with genus

Kvacekispermum rugosum E.M.Friis, P.R.Crane et K.R.Pedersen 2018

Kvacekispermum costatum E.M.Friis, P.R.Crane et K.R.Pedersen 2019


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