Rightcania kvacekii E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN000105
Act LSID: urn:lsid:plantfossilnames.org:act:105
Genus: Rightcania E.M.Friis, P.R.Crane et K.R.Pedersen
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: 69
Illustrations or figures: text-figs 1–2
Name is type taxon for
Holotype PP53183, Paleobotanical Collections, Department of Geology, The Field Museum, Chicago, Illinois, USA
Figures: text-figs 1a–e, 2a–d
Note: Paratypes: PP56566 – PP56568 (Puddledock sample 183); PP56564, PP56565 (Puddledock sample 185).
Fruit a berry with three to five ovules/seeds and a fruit wall of thin-walled parenchyma cells. Stigmatic area sessile, indistinct. Hypanthium fused to lower part of ovary wall. Ovules pendent, orthotropous to semi-orthotropous, bitegmic, endotestal with a testa of multiple cell layers. Exotesta of several layers of slightly elongate, irregular wavy cells; endotesta a single layer of cubic to palisade-shaped cells containing densely spaced crystals and fibrous infillings. Outer surface of endotesta smooth. Tegmen several cell layers thick; exotegmen of elongated fibrous cells, mesotegmen and endotegmen with large, slightly elongate and thin-walled cells; inner layers of tegmen crushed in mature seeds. Embryo tiny; nutritive tissue of isodiametric thin-walled cells.
The name kvacekii is in honor of Zlatko Kvaček for his contribution to palaeobotany.
Cretaceous, Lower Cretaceous
early to middle Albian
Type horizon: Basal part of Subzone IIB, Potomac Group
Puddledock locality, former Tarmac Lone Star Industries (Vulcan Materials Co.) sand and gravel pit, located south of Richmond and east of the Appomattox River in Prince George County, Virginia (37° 15′ 52″ N, 77° 22′ 10″ W)
Plant fossil remain
macro- and meso-fossils-embryophytes except wood