Trigonobalanopsis rhamnoides (ROSSMÄSSLER) KVAČEK et WALTHER

Kvaček, Zlatko & Teodoridis, Vasilis, 2011, The Late Eocene Flora Of Kučlín Near Bílina In North Bohemia Revisited, Acta Musei Nationalis Pragae Series B 67 (3 - 4), pp. 83-144 : 98

Trigonobalanopsis rhamnoides (ROSSMÄSSLER) KVAČEK et WALTHER

Pl. 7, fig. 7

1988 Trigonobalanopsis rhamnoides (ROSSMÄSSLER) KVAČEK et WALTHER , p. 405, pl. 2, figs 1-8, pls 50-54, pl. 55, figs 2-7, pl. 56, figs 1-4, pl. 57, text-figs 2-4.

Leaves petiolate, incompletely preserved, lamina narrow elliptical, base cuneate, margin entire, venation brochidodromous, midrib straight, secondaries very regularly disposed, bent, subparallel, at an angle of ca. 35°. Higher-order venation not preserved.

D i s c u s s i o n: This extinct member of the Fagaceae has been usually recognized mainly according to its rhamnoid venation ( Phyllites rhamnoides ROSSM. ). Its occurrences in the Eocene are rare ( Knobloch et al 1996). In the volcanic facies Trigonobalanopsis was usually poorly represented (Rott, as Rhamnus dechenii WEBER ) while it was a dominant element in the Miocene mastixioid floras ( Kvaček and Walther 1988). The occurrence of rare specimens at Kučlín is quite exceptional outside the Late Eocene riparian vegetation in the Bohemian Massif.

M a t e r i a l: KIN 372.