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Frangula priabonica
Frangula priabonica Doweld Phytotaxa, 321(1): 196. 15 Sep 2017
- Name
- Frangula priabonica
- Rank
- Species
- Generic Name
- [Genus] Frangula
- Replaced Name
- Frangula hordwellensis
- Authors (Pub.)
- Doweld A. B.
- Publication
- New names of fossil Atadinus, Endotropis and Frangula (Rhamnaceae) [2017/9]
- Journal
- Phytotaxa
- Volume
- 321
- Issue
- 1
- Page number
- 196
- Year
- 2017
- Fossil Status
- fruits
- Stratigraphy
- Priabonian
- Strat. comment
- Headon Hill Formation
- Location
- Hordle [Hordwell] Cliffs, South Hampshire, U.K.
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Natural History Museum, London, U.K.
- Repository Number
- V. 42156
- Diagnosis
- The fruit pyrenaceous, 6.25 mm long and 4 mm wide, having two pyrenes. Each pyrene containing a single seed closely embraced by the endocarp except the proximal end, subcircular or broadly oboval, much flattened, with marked excavation at the base where the hilar end of the seed projects beyond the endocarp; apex slightly emarginate. One flattened surface with a median longitudinal suture. Endocarp formed superficially of somewhat irregular-sized equiaxial cells, 0.012–0.016 mm in diam., the smallest towards the base. Inner layers formed of oblique fibers giving a striate appearance. Seeds anatropous with a marginal raphe, agreeing in shape with endocarp. Seed where exposed at the base having a deep hilar excavation, narrowly oval in outline and provided with a low median ridge parallel with the long axis of the excavation and the broad surfaces of the seed. Testa 0.1 mm thick at the margin, but 0.05 mm at the middle of a broad surface, formed superficially of convex finely digitate cells about 0.025 mm, columnar in section, the columns having slightly sinuous outlines due to the convexity of these cells piled one upon another. Tegmen thin, finely striate, formed of elongate cells which produce parallel striae.
Nomenclatural synonyms
Species
