B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Rákosi, László; Barbacka, Mária: Upper Cretaceous flora from Ajka (W Hungary). I. Thallophyta

The natural system Division: Prasinophyta Order: Pterospermales Family: Cymatiosphaeraceae Genus: Schizosporis Cookson et Dettman 1959 Generotype: Schizosporis reticulatus Cookson et Dettman 1959 Schizosporis reticulatus Cookson et Dettman 1959 Figs 42-45 Description: A rounded pseudoreticular capsula, 900-1100 pm in diameter, with elevated polygonal to rounded meshes and relatively large pits in the centre of each mesh. Remarks: This taxon was described by several authors, most of whom considered it to be a planktonic organism of unknown origin. BRENNER (1963) published high quality light microscope pictures of it. PIERCE (1976) rejected it as belonging to algae and mentioned "unknown relation". VAN GEEL (1979) assigned the genus to the family of Zygnemataceae and TAPPAN (1980) to Prasinophyta. Found in the boreholes Kf-1, from 686.4 m, 622.9 m, Kf-2 from 805.0 m, 800.7 m, Gy-12 from 528.6 m (dominant) and 500.8 m as well as from comparing sample from Ajka, No 21. Age: Upper Cretaceous, Ajka Coal Formation. Division: Chlorophyta Class: Bryopsidophyceae Order: Dasycladales Family: Dasycladaceae Tribus: Diploporae Genus: Munieria Deecke 1883 Generotype: Munieria baconica Deecke 1883 Munieria grambasti Bystricki 1976 subsp. sarda Cherchi, Gasic, Schmidt et Schroeder 1981 Description: Calcareous Chlorophyta. The axis of thallus is divided into segments, ornamented by radially distributed pores. The calcareous skeleton is rounded, with longitudinal grooves on the surface. Remark: This species occurs in great numbers in all examined samples.