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Nitaspermum marylandense
Nitaspermum marylandense Friis, P.R. Crane, K.R. Pedersen in M. Krings, C.J. Harper, Cúneo, G.W. Rothwell Transf. Paleobot. 428. 20 Jul 2018
- Name
- Nitaspermum marylandense
- Rank
- Species
- Generic Name
- [Genus] Nitaspermum
- Authors (Pub.)
- Friis E. M.
Crane P. R.
Pedersen K. R.
- Publication
- 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 [2018/7]
- Authors (Book)
- Krings M.
Harper C. J.
Cúneo N. R.
Rothwell G. W.
- Book
- Transformative Paleobotany
- Page number
- 428
- Year
- 2018
- Fossil Status
- seeds
- Stratigraphy
- Albian
- Location
- Kenilworth (Bladensburg), west facing
exposure overlooking Washington, DC, Prince George
County, Maryland, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- Field Museum, Chicago, USA
- Repository Number
- PP54052 (Kenilworth sample
174)
Data for Paratypus
- Repository
- Field Museum, Chicago, USA
- Repository Number
- PP56537 (Kenilworth sample 061), PP56538
(Kenilworth sample 174)
- Diagnosis
- 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.
