Engelhardia orsbergensis (WESSEL et WEBER) JÄHNICHEN, MAI 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 : 66

Engelhardia orsbergensis (WESSEL et WEBER) JÄHNICHEN, MAI et WALTHER

Pl. 6, Fig. 9, Pl. 14, Fig. 1–5

1856 Banksia orsbergensis WESSEL et WEBER , p. 146, pl. 25, fig. 9a–d.

1961 Myrica lignitum (UNGER) SAPORTA ; Knobloch, p. 256, pro parte, pl. 1, fig. 13, pl. 2, fig. 10, pl. 2, fig. 3, pl. 12, fig. 5.

1977 Engelhardia orsbergensis (WESSEL et WEBER) JÄHNICHEN, MAI et WALTHER , p. 326, pl. 38–49, text-fig. 1–3.

Leaflets narrow elongate, 34–55 mm long and 13 mm wide, straight to slightly bent, minutely widely dentate, base asymmetrical. The epidermal structure rarely preserved on delicate leaflets, showing rounded stalks of peltate trichomes and sunken stomata.

D i s c u s s i o n. The material from Knížecí was partly identified as Myrica lignitum ( Knobloch 1961, p. 256, morphotype 1, cf. Dryandroides acuminata ). All specimens studied correspond morphologically to the variation in Engelhardia orsbergensis as known from the type locality Orsberg in the Rhineland ( Jähnichen et al. 1977, Winterscheid and Kvaček 2014) and other occurrences in the České středohoří Mountains (e.g. Kvaček and Walther 1995, 1998). Similar leaflets, but lacking epidermal structure, have been described from the early Oligocene site Häring in Austria under several fossil species, e.g. Rhus prisca ETTINGSHAUSEN and R. juglandogene ETTINGSHAUSEN.

M a t e r i a l s t u d i e d: Leaflets, NM-G2805, NM-G2824, NM-G8582, NM-G11511a, b, EK 303–311, some more not numbered.