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

Costatheca verrucata Gunther et Hills 1972 Figs 24-25 Description: Ovate to bean-shaped, 300-400 pm in diameter and 200-300 pm long. The size of Verrucae 2-10 pm. Remark: This species is known only from the Upper Maastrichtian, in Ajka only a small number of specimens were found. Figs 30-34. - 30-31 = Costateca discoënsis, massulae; borehole Kf-2,

789.6 m, bar = 1 mm. - 32-33 = Spermatites pylophorus, bar = 300 urn. - 34 = Costatheca discoënsis, borehole Gy-9, 590.4 m, bar = 300 p.m.