Observations on Dissocladella annulata (Elliott, 1993) nov. comb. (Calcareous algae, Dasycladales) from the Cenomanian of west Serbia

Abstract

Based on material from the type area at Tetrebovo in the Zlatibor massif of WSerbia, the Cenomanian dasycladalean alga originally described as Harlanjohnsonella annulata by ELLIOTT (1968, typified 1993 in: GRANIER & DELOFFRE), is emended and revisited as Dissocladella annulata (ELLIOTT) nov. comb. The evidence of tufts of short secondaries arising at the top of the drop-like primaries allows its transfer to the genus Dissocladella PIA, 1936. This species displays a different degree of skeleton calcification which is described in detail. The monospecific genus Harlanjohnsonella ELLIOTT becomes invalid, as being a junior synonym of Dissocladella.