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

a common species; it was found mainly in boreholes Kf-1 from 628.3 m, 622.9 m, 619.5 m, Kf-6 from 588.7 m and Nh-1 from 649.2, 646.5, 641.4 m. Family: Azollaceae Genus: Azollopsis (Hall 1968) Sweet et Hills 1974 Generotype: Azollopsis coccoides Hall 1968 Azollopsis (Azollopsis) tometosa Hall 1968 Description: Megaspore complex, subcircular to ovate, 500-600 pm wide, having 100-200 floats per complex. Remark: The material from the genus Azollopsis has been found maily in the borehole Kf-1, from 628.3, 622.9, 619.6 m. Subgenus: Spiralopsis Sweet et Hills 1974 Generotype: Azollopsis (Spiralopsis) intermedia Sweet et Hills 1974 Azollopsis (Spiralopsis) intermedia Sweet et Hills 1974 Figs 68-69 Description: Megaspore complex, ovate to fusiform in shape, usually 300-500 pm long and 200-400 pm wide. It has more than 100-200 floats per megaspore complex. Remark: This species is common in the boreholes Cr-2 and Kf-1. Azollopsis (Spiralopsis) pusilla Sweet et Hills 1974 Figs 64-67, 70 Description: Megaspore complexes ovate to fusiform with proximal end usually more elongated than distal end, about 500 pm long and 300 pm wide. It usually shows more than 128 floats per megaspore complex. The golchidia are circinate. Remark: The stratigraphical widespreading of heterosporous ferns belonging to the orders Marsileales and Salviniales was published recently by KOVACK and BATTEN (1989).