Nitaspermum crassum E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN001795
Act LSID: urn:lsid:plantfossilnames.org:act:1795
Genus: Nitaspermum E.M.Friis, P.R.Crane et K.R.Pedersen
Reference: Friis, E. M., Crane, P. R. & Pedersen, K. R. (2018): Fossil seeds with affinities to Austrobaileyales and Nymphaeales from the Early Cretaceous (early to middle Albian) of Virginia and Maryland, USA: new evidence for extensive extinction near the base of the angiosperm tree. Academic Press: 417–435.
Page of description: 424
Illustrations or figures: pl. VI
Holotype PP54180, Paleobotanical Collections, Department of Geology, The Field Museum, Chicago, Illinois, USA
Figures: pl. VI, figs 1–7
Note: Holtype from the Puddledock sample 083.
As for the genus with the following additions: Seeds elliptic in lateral view, broadest at around the midpoint, almost circular in transverse section. Hilum and micropyle slightly raised. Hilum almost circular, lacking a prominent rim. Palisade cells of exotesta short, except over the raphe where they are tall. Facets of exotesta cells equiaxial, irregularly aligned over most of the seed surface; folds of anticlinal walls rounded. Exotestal tissue between hilum and micropyle elongate, almost straight in longitudinal section.
The species name is from Latin crassa, meaning “thick” to indicate the plump seed shape.
Cretaceous, Lower Cretaceous, Albian
Basal part of Subzone IIB, Potomac Group (early to middle Albian)
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