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

Common species, sometimes found in great numbers in the deposits of the Ajka Coal Formation. Occurrence: Boreholes Gy-9, from 590.4 m, 559.8 m, 484.9 m, Gy-12 from 540.0 m, 533.5 m, 528.6 m, 456.0 m, Cr-2 from 594.5 m, 594.2 m, Kf-1 from 725.7 m, 713.9 m, 619.5 m, Kf-2 from 732.7 m, between 702.85-703.25 m, Nh-1 from 664.3 m, 649.2 m, 640.4 m. Dominant in Armin shaft, bench II (23-21 samples). Figs 64-67. Azollopsis (Spiralopsis) pusilla, SEM. - 64 = Megaspore surrounded by microspores, borehole Kf-2, 697.15 m, bar = 450 pm. - 65 = Microspores, borehole Kf-2, 697.15, bar = 300 pm. 66 = The surface of the megaspore with golhidia, bar = 30 pm. - 67 = Circulate golchidia, bar = 30 pm.