Acer cf. palaeosaccharinum STUR

Kvaček, Zlatko, Teodoridis, Vasilis & Radoň, Miroslav, 2018, Review Of The Late Oligocene Flora Of Matrý Near Sebuzín (České Středohoří Mts., The Czech Republic), Fossil Imprint 74 (3 - 4), pp. 292-316 : 299

Acer cf. palaeosaccharinum STUR

Pl. 9, Figs 3, 4, 6

? 1867 Acer palaeosaccharinum STUR , p. 177, pl. 5, fig. 8.

? 1869 Acer dasycarpoidesc HEER ; Ettingshausen, p. 19, pro parte, pl. 40, fig. 3.

2002 Acer cf. palaeosaccharinum STUR ; Radoň, p. 134, photo 5 below, text-fig. 1.2.

2009 Acer crenatifolium ETTINGSH. ; Akhmetiev et al., p. 117, pl. 12, fig. 2.

M a t e r i a l s t u d i e d. Leaf impressions PA 1184.1–2,

1189.1, 1356.

D e s c r i p t i o n. The leaves are deeply tricuspidate, blades from 19 mm to more than 65 mm in length and 22 mm to 74 mm in width, lobes of almost the same width, with subparallel margins, widely simple to irregularly double dentate.

D i s c u s s i o n. We follow the treatment proposed by Walther and Kvaček (2007: 117) stressing that foliage from the České středohoří Mts. assigned to A. angustilobum is difficult to differentiate from some forms of A. palaeosaccharinum . Maple leaves with a prominently double dentate middle lobe have usually been assigned to Acer palaeosaccharinum STUR but transitional forms connect them with typical Acer angustilobum with only simple dentation on the main lobe. Both fossil morphotypes are connected with a transition phase.