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

well as spores in situ. This makes it possible to establish affinities of certain samples. In case of dispersed sporangia their affinities may have been established to family level only. Order: Filicales Family: Cyatheaceae cf. Cyathidites australis Figs 50-52, 59-60, 62 Description: In the isolated sorus 14 sporangia and one remain of placenta are found. Indusium is lacking. Sporangia are situated in pairs. The sporangium consists of rounded annuli, that are placed obliquely to the longitudinal axis of the sporangium faced each other, around the central place (Fig. 51). The thick walls of the annuli are well visible. Mass of the spores was prepared from the sporangium; they may be identified as Cyathidites australis Couper 1956 (Figs 50, 52). Remarks: According to palynological examinations, this type of sporangium is common in the Hungarian Senonian deposits. From the area of Ajka we know only one specimen of sorus remain that was found in the borehole Gy12 from 493 m. Family: Schizaeaceae cf. Anemia sp. Figs 53-58 Description: The sporangia are egg-shaped, in compressed state they are 400-500 pm large. They consist of two parts; the upper one (annulus) and the lower, thin walled part, that consists of spores (50-80 pm large) with visible dehiscencia pore. The annulus consists of 14-18 thickenings. The isolated spores belong to Appendicisporites tricuspidatus Weyland et Greifeid 1953 (Figs 56-58). Remarks: The material originates from the borehole Kf-2 from 761.5 m. It is common in Hungarian Senonian deposits. The affinities of these sporangia are close to the family Schizaeaceae.