Dicotylophyllum sp. 4

Greguš, Josef & Kvaček, Jiří, 2015, Revision Of Cenomanian Flora From The Maletín Sandstone, Acta Musei Nationalis Pragae Series B 71 (3 - 4), pp. 315-364 : 334-335

Dicotylophyllum sp. 4

Pl. 20, Fig. 5

S t r a t i g r a p h y: Peruc-Korycany Formation, Cenomanian, Upper Cretaceous.

M a t e r i a l s t u d i e d: GBA_114.

O c c u r r e n c e: Maletín

D e s c r i p t i o n. Single leaf impression of linear pinnatisect leaf (NHMW_114, Pl. 20, Fig. 5). Leaf lamina 88 mm long and 8 mm wide, divided into alternately arranged segments, dissected almost to the midvein. Base longitudinally and narrowly cuneate, segments begin at 1/3 of length. Approximately 7 mm long segments depart run out at 30° angle, wider at base, and obtuse in apical parts. Midvein relatively robust. Primary venation pinnate, secondary not observed.

D i s c u s s i o n. Dicotylophyllum sp. 4 differs from D. macrophyllum , Dicotylophyllum sp. 1 , Dicotyllophyllum sp. 2 and Dicotyllophyllum sp. 3 in having linear pinnatisect shape of leaf lamina.

Dicotylophyllum sp. 4 is morphologically similar to “ Dryandra ” cretacea VELENOVSKÝ , but differs in having an undivided base, and also in shape of segments, which are long convergent to rounded apex. “ Dryandra ” cretacea shows triangular shape of segments with acute apex ( Velenovský 1883). For classification of this taxon, genus Dryandrophyllum VELENOVSKÝ, 1889 would seem to be a better choice, but it was unfortunatelly not validly published.