Ampelopsis hibschii BŮŽEK, 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 : 63

Ampelopsis hibschii BŮŽEK, KVAČEK et WALTHER

Pl. 8, Fig. 1–6

1961 Platanus cf. aceroides GÖPPERT ; Knobloch, p. 277, pl. 10, fig. 3 [NM-G2891].

1961 Vitis sp. ; Knobloch, p. 288, pl. 8, fig. 3 [NM-G2869].

1961 Zelkova ungeri KOVÁTS ; Knobloch, p. 270, pro parte, pl. 7, fig. 7 [NM-G2855].

1981 Ampelopsis hibschii BŮŽEK, KVAČEK et WALTHER , p. 127, pl. 1–6, text-fig. 1–7.

Knobloch (1958) described the material as follows (translated from Czech): “Base slightly cordate, leaf probably palmately veined and trilobate. From the base three basal veins and secondaries emerge, which are slightly wavy and end in the marginal teeth. Tertiary veins are perpendicular or oblique between secondaries and form variable large fields. Petiole 18 mm long” (under Platanus cf. aceroides ). “A rounded leaf, probably shallowly trilobed (leaf margin and apex not preserved). Base cordate, basal veins slightly arched, secondaries also wavy. Tertiaries forked between secondaries producing a broken line. Quaternary venation composed of a network of polygonal areoles” (under Vitis sp. ). Morphologically variable fragmentary foliage attains 38 to ca. 78 mm in length and 68 to ca. 80 mm in width.

D i s c u s s i o n. Besides large fragmentary leaves and a petiolate base assigned to Platanus cf. aceroides , Vitis and partly Zelkova by Knobloch (1961), we recovered from the additional fragmentary material from Knížecí leaf apices with a separated tip, a diagnostic feature of A. hibschii ( Bůžek et al. 1981) . We assume that other fragmentary leaf fossils apparently belonging to Vitaceae , as listed in the synonymy, belong to this species known from Bechlejovice, Kundratice and elsewhere. One impression assigned to Zelkova ( Knobloch 1961, pl. 7, fig. 7) may represent a leaflet of a compound leaf only rarely encountered in this species (e.g. Walther in Mai and Walther 1978, pl. 7, fig. 2–3, as Ampelopsis sp. ).

M a t e r i a l s t u d i e d: Leaf impressions, NM-G2855, NM-G2869, NM-G2891, EK 267–271, more specimens not numbered.