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Eotrigonobalanus conwentzii
Eotrigonobalanus conwentzii Sadowski, A.R. Schmidt, Denk Willdenowia, 50: 491. 1 Dec 2020
- Name
- Eotrigonobalanus conwentzii
- Rank
- Species
- Generic Name
- [Genus] Eotrigonobalanus
- Authors (Pub.)
- Sadowski E.-M.
Schmidt A. R.
Denk T.
- Publication
- Staminate inflorescences with in situ pollen from Eocene Baltic amber reveal high
diversity in Fagaceae (oak family) [2020/12]
- Journal
- Willdenowia
- Volume
- 50
- Page number
- 491
- Year
- 2020
- Fossil Status
- inflorescences (male)
- Stratigraphy
- Priabonian
- Location
- in amber; Samland peninsula, Prussia = Kaliningrad peninsula, Kaliningrad region, Russian Federation
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Georg-August-Universität Göttingen, Geowissenschaftliches Museum, Göttingen, Germany
- Repository Number
- GZG.BST.6895
- Diagnosis
- Pendulous staminate inflorescence, rachis
glabrous. Florets singular or in clusters of 2 or 3, sessile.
Perianth cyathiform, incised to lower third, forming triangular,
acute lobes with irregular serrate margin. Outer
perianth surface and margin only rarely with solitary trichomes.
Each floret with central, loose trichome tuft composed
of solitary trichomes. Stamens numerous, 6 – 11
stamens per floret, filaments elongated and projecting beyond
perianth. Anthers narrowly elliptic, apically notched,
basifixed. Florets subtended by single bract, lanceolate to
linear, terminating in acute apex; bracts mostly glabrous,
scarcely with few solitary trichomes on margin and abaxial
lamina. Pollen tricolporate, elliptic, microrugulate, perforate,
microrugulae twisted and interwoven, forming aggregates;
footlayer moderately thick in mesocolpium.
