Eotrigonobalanus campanulata

Name

Eotrigonobalanus campanulata

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

494

Year

2020

Fossil Status

inflorescences (male)

Stratigraphy

Priabonian

Location

in amber; Samland peninsula, Kaliningrad region, Russian Federation

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Georg-August-Universität Göttingen, Geowissenschaftliches Museum, Göttingen, Germany

Repository Number

GZG.BST.24419

Num

Fig. 51

Pub.

Staminate inflorescences with in situ pollen from Eocene Baltic amber reveal high diversity in Fagaceae (oak family) [2020/12]

Diagnosis

Pendulous staminate inflorescence, rachis occasionally with solitary and stellate trichomes. Florets singular or in dichasia of 3 florets, sessile. Perianth campanulate, mostly incised to upper third, sometimes also to lower third, forming triangular, acute lobes with irregular serrate margin. Outer perianth surface only rarely with solitary trichomes. Each floret with loose, central trichome tuft composed of solitary trichomes. Stamens numerous, 6 or 7 stamens per floret, filaments elongated, projecting far beyond perianth. Anthers narrowly elliptic, apically notched, basifixed. Dichasia subtended by singular, glabrous bract, sometimes lacking (caducous), lanceolate, terminating in acute apex.