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Oxfordiana
Genus Oxfordiana A.R.T. Spencer, J. Hilton in A.R.T. Spencer, R. J. Garwood, A. R. Rees, R. J. Raine, G.W. Rothwell, Hollingw., J. Hilton PeerJ, 5(e3723): 15. 28 Aug 2017
- Name
- Oxfordiana
- Rank
- Genus
- Authors (Name)
- Spencer A. R. T.
Hilton J.
- Authors (Pub.)
- Spencer A. R. T.
Garwood R. J.
Rees A. R.
Raine R. J.
Rothwell G. W.
Hollingworth N. T. J.
Hilton J.
- Publication
- New insights into Mesozoic cycad evolution: an exploration of anatomically preserved Cycadaceae seeds from the Jurassic Oxford Clay biota [2017/8]
- Journal
- PeerJ
- Volume
- 5
- Issue
- e3723
- Page number
- 15
- Year
- 2017
- Parent Taxon
- [Family] Cycadaceae
- Fossil Status
- seeds
- Type
- Oxfordiana motturii
- Diagnosis
- Anatomically preserved ovule with bilateral symmetry, ovate–orbicular in longitudinal section, circular in external cross-section, with pronounced longitudinal ribs and internal integumentary groove dividing the seed coat into two valves. Ribs rise from a flattened, concave base, with central attachment scar, extending to a pointed apex with conical micropyle. Integument three layered. Nucellus attached to integument at base; nucellar apex comprising a small pollen chamber and nucellar beak.
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