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 sizes of the identified spores and massulae, respectively, indicate a sedimentary process among undisturbed, near-shore conditions. The presence of megaspore species, however, refers to humid, dystrophic boggy soil, to undisturbed nutritious water surface and perhaps an environment provided by brackish water or standing water stretches of rivers. REFERENCES BATTEN, D. J. and ZAVATTIERI, A. M. (1996): Occurrence of dispersed seed cuticles and similar microfossils in mainly Cretaceous successions of the Northern Hemisphere. - Cretaceous Research 16: 73-94. BERGAD, R. D. (1973): North American species of the Cretaceous megaspores Balmeisporites and Monophyllosporites. -Micropalaeontology 19: 53-67. BERGAD, R. D. (1978): Ultrastruclural studies of selected North American Cretaceous megaspores of Minerisporites, Erlansonisporites, Horstisporites, and Ricinospora, n. gen. - Palynology 2: 39-53. BINDA, P. j. and NAMBUDIRI, E. M. (1983): Fossil seed cuticles from the Upper Cretaceous Whitemud beds of Alberta and Saskatchewan, Canada. - Can. J. Bot. 61: 2717-2728. BRENNER, G. J. (1963): The spores and pollen of the Potomac group of Maryland. -Maryland Dep. Geol. Mines Water Res. 27: 1-225. Coll inson, M. E. (1978): Dispersed fern sporangia from the British Tertiary.— Ann. Bot. 42: 233—250. CSÁSZÁR, G. h. and BODROGI, I. (1985): Munieriak a magyarországi krétában. [Munieria sp. from the Hungarian Cretaceous]. - M. Áll. Földi. Int. Évi Jel. 1983: 167-212. CSÁSZÁR, G. H. and GÓCZÁN, F. (1988): A Bakony felső-kréta kőszénkutatás és kőszén láp vizsgálat. (Upper Cretaceous coal prospecting and peat bog studies in the Bakony Mts). - M. Áll. Földt. Int. Évi Jel. 1986: 155-178. DIJKSTRA, S. J. (1961): Some Palaeocene megaspores and other small fossils. - Meded. Geol. Stichting., n. s., 13: 5-1 !. ELLIS, C. H. and TSCHUDY, R. H. (1964): The Cretaceous megaspore genus Arellites Miner. Micropalaeontology 10: 73-79. GELLAI, M. and TÓTH, K. (1982): Munieriak a Sümeg - Gyepükaján környéki szenonból (ajkai formáció). (Munieria sp. from the Senonian of Sümeg - Gyepükaján - Ajka Formation. Földt. Közi. 112(3): 267-274. GÓCZÁN, F., SIEGL-FARKAS, A., MORA-CABALAY, L., RIMANÓCZY, A., VlCZIAN, J., RÁKOSI, L., CSALAGOVITS, .1. and PARTÉNYI, Z. (1986): Ajka Coal Formation: biostratigraphy and geohistory. - Acta Geol. Hung. 29(3-4): 221-231. GREGUSS, P. (1949): Az ajkai felsőkrctakorú barnakőszén fuzitzárványok meghatározása (Podocarpoxylon ajkaense nov.sp.). (Bestimmung des Fusit-Einschlusses der Braunkohle von Ajka aus der oberen Kreidezeit. (Podocarpoxylon ajkaense nov. sp.)).-Földt. Közl 1949(9-12): 1-15. GUNTHER, P. R. and HILLS, L. V. (1972): Megaspores and other palynomorps of the Brazeau Formation (Upper Cretaceous), Nordegg Area, Alberta. - Geoscience and Man 4: 29^48. HALL, J. W. (1967): Invalidity of the name Chrysotheca Miner for microfossils. -/. Palaeontol. 41: 1298-1299. HALL, J. W. (1974): Cretaceous Salviniaceae. - Ann. Missouri Bot. Gard. 61: 354-367. HORST, U. (1954): Merkwürdige Gebildein Kohlen aus dem Wealden. - Geologie, Berlin, 3: 610-612.