Ulmus sp.

Bubík, Miroslav, Doláková, Nela, Kvaček, Zlatko & Teodoridis, Vasilis, 2022, A New Early Miocene (Ottnangian) Flora Of The “ Rzehakia Beds ” From Brno-Líšeň, Fossil Imprint 78 (1), pp. 263-287 : 269

publication ID	https://doi.org/ 10.37520/fi.2022.010
persistent identifier	https://treatment.plazi.org/id/D343B62F-FFB4-012E-FE44-FF4FFD55FC78
treatment provided by	Felipe
scientific name	Ulmus sp.
status

Treatment

Ulmus sp.

Text-fig. 4g, h View Text-fig , Pl. 2, Figs 10, 11

M a t e r i a l. 2 specimens, Líšeň-Neklež ( MB105 a,

MB106).

D e s c r i p t i o n. Leaves asymmetric, ovate, 12 and 6 mm long, 9 and 5 mm wide, base incomplete round or slightly cordate, apex incomplete shortly attenuate to acute, margin double-dentate with rectangular primary teeth, secondary teeth usually finer; venation simple craspedodromous, midrib strong, moderate, straight, secondary veins thin, distinct, alternate to opposite, originating at 30° to 60°, curved towards to apex and margin, rarely forked, tertiary veins often straight or forked, venation of higher orders regular polygonal reticulate, areolation well-developed, 3 to 4 sided, veinlets branching dichotomously.

R e m a r k s. The leaf material shows a close affinity to Ulmus pyramidalis GÖPP. due to the distinctly dentate margin and closely spaced parallel secondary veins, but the specimens are extremely small. Ulmus pyramidalis can be compared to the recent species U. americana L., distributed in east and southeast areas of the USA as a characteristic element of riparian forests ( Kvaček and Bůžek 1983). U. pyramidalis was a typical element of riparian forests, and probably grew on elevated habitats along rivers (levees).