Ulmaceae

Erdei, Bolgárka, Hably, Lilla, Héja, Gábor & Fodor, László, 2022, The Late Oligocene Macroflora Of Zsámbék, Central Hungary, Fossil Imprint 78 (1), pp. 298-309 : 301

cf. Ulmaceae gen. et sp. 1

Pl. 2, Fig. 5

M a t e r i a l. HNHM-PBO 2021.180.1., HNHM-PBO

2021.183.1.

D e s c r i p t i o n. Fragmentary leaves. Length and width of the fragments are up to 5 cm, and 3.5 cm, respectively. One of the leaves (Pl. 2, Fig. 5) appears basally slightly asymmetric in shape. Apex and base are damaged, and the margin is poorly preserved. Venation is craspedodromous. Secondary veins emerge at an acute angle (at 40–45°) from the midvein. Secondaries are straight, quite regularly spaced, and run parallel to each other.

D i s c u s s i o n. The leaves are heavily fragmented, but the gross venation pattern of the leaves is recognizable even in coarse-grained sedimentary matrix ( Hably and Szakmány 2006). The venation and the basally slightly asymmetric lamina shape resemble the species Ulmus pyramidalis GÖPP. , one of the most frequent species of elm in the Egerian floras of Hungary (Pl. 2, Fig. 6; a leaf from Pomáz) occurring in nearly all localities. The species appeared in the Pannonian region mainly in the wetland environments. Similar leaves were recorded in younger localities of Europe, e.g., in the Neogene flora of Wollbach ( Kelber 2020).