Celtis pirskenbergensis (KNOBLOCH) KVAČEK et WALTHER

Kvaček, Zlatko, Teodoridis, Vasilis & Zajícová, Jana, 2015, Revision Of The Early Oligocene Flora Of Hrazený Hill (Formerly Pirskenberg) In Knížecí Near Šluknov, North Bohemia, Acta Musei Nationalis Pragae Series B 71 (1 - 2), pp. 55-102 : 65

Celtis pirskenbergensis (KNOBLOCH) KVAČEK et WALTHER

Pl. 12, Fig. 1–6

1961 Celtis begonioides GÖPPERT var. pirskenbergensis KNOBLOCH , p. 273, pl. 6, fig. 3, 5, 8 (holotype).

1961 Celtis begonioides GÖPPERT ; Knobloch, p. 273, pl. 6, fig. 9, pl. 12, fig. 4.

2006 Celtis sp. ; Radoň et al., p. 101, pl. 5, fig. 5–7.

2007 Celtis pirskenbergensis (KNOBLOCH) KVAČEK et WALTHER ; Walther and Kvaček, p. 101, pl. 7, fig. 1–8, text-fig. 4a–c.

Leaves short petiolate, ovate to elongate, up to 64 mm long and 16 to ca. 45 mm wide, oblique at base, on margin coarsely serrate, slightly asymmetrical. Three basal veins arise from below the lamina base at sharp angles. Outer basal veins ascend upwards to about one half of the leaf length and then loop with higher almost straight secondary veins. Tertiary veins are perpendicular (translated from Knobloch 1958, 1961, emended).

D i s c u s s i o n. Kvaček and Walther (in Walther and Kvaček 2007) merged all specimens of Celtis recovered from Knížecí and elsewhere in the Palaeogene of North Bohemia and Saxony into a single fossil species C. pirskenbergensis (KNOBLOCH) KVAČEK et WALTHER. The same large sized kind of foliage also occurs at the other Oligocene sites Holý Kluk ( Radoň et al. 2006) and Seifhennersdorf ( Walther and Kvaček 2007). We agree with this treatment leaving separately other fossil species known from the Miocene, which clearly differ morphologically (see e.g. Němejc et al. 2003).

M a t e r i a l s t u d i e d: Leaf impressions, NM-G2850a, b (holotype), NM-G2851a, b, NM-G2852, NM-G2853a, b, NM-G2979, NM-G8600 .