Nitaspermum marylandense E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN001797
Act LSID: urn:lsid:plantfossilnames.org:act:1797
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: 428
Illustrations or figures: pl. IX
Holotype PP54052, Paleobotanical Collections, Department of Geology, The Field Museum, Chicago, Illinois, USA
Figures: pl. IX, figs 1–7
Note: Holotype from the Kenilworth sample 174.
Paratypes: PP56537 (Kenilworth sample 061), PP56538 (Kenilworth sample 174)
As for the genus with the following additions: Seeds broadly elliptic in lateral view, broadest around the midpoint, and narrow elliptic in transverse section. Hilum and micropyle slightly raised. Hilum circular in outline with prominent rim. Palisade cells of exotesta very short. Facets of exotesta cells equiaxial, irregularly aligned over most of the seed surface; folds of anticlinal walls are rounded. Exotestal tissue between hilum and micropyle slightly sinuous in longitudinal section.
The species is named for the State of Maryland, USA, in which the Kenilworth locality is located.
Cretaceous, Lower Cretaceous, Albian
Basal part of Subzone IIB, Potomac Group (early to middle Albian).
Kenilworth (Bladensburg), west facing exposure overlooking Washington, DC, Prince George County, Maryland, USA (38°55ʹ53ʺ N; 76°55ʹ45ʺ W)
Plant fossil remain
macro- and meso-fossils-embryophytes except wood