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 striata (Dijkstra 1949) Hall 1967 emend. Binda and Nambudiri 1982 Description: Seed cuticles oblong, ovate, 800-1300 pm long and 300-600 pm wide, often with striations. Cells of testa are rectangular to hexagonal. Remark: In Ajka this species occurs in numbers higher than C. verrucata. Costatheca friisae Knobloch 1986 Description: Seed cuticles ovate, 300-350 pm wide. The plicae on the surface form anastomosis towards the acute apex. Remark: Only a few samples were found in the boreholes of Gyepükaján and Káptalanfa. Genus: Spermatites Miner 1935 Generotype: Spermatites elongatus Miner 1935 Remark: The taxonomic position and affinity of this genus is still unknown. Spermatites elongatus Miner 1935 Description: Cuticular seed coat, oblong to elliptical in shape with narrow end at the top in lateral view. Length 800-1000 pm, width 300-500 pm. Remarks: This species is very common in Ajka. The cuticular structure of the specimens is well visible. Sometimes minor differences are noticed if compared with data from the literature (BATTEN and ZAVATTIERI 1996). Similar stmctures were described as Diptera (Insecta) by WEYLAND et al (1960). Spermatites ellipticus Miner 1935 subsp. minor Binda 1968 Figs 22-23 Description: Elliptical to oblong in shape, with convex sides, about 400-500 pm long and 250-350 pm wide. Surface reticulated, the meshes become narrower towards the tip.