Hexagonifera cylindrica (Habib, 1970, p.374, pl.10, fig.2) Habib, 1972, p.378. Emendations: Prauss, 1989, p.47–48, Riding, 1994, p.18 and Feist-Burkhardt and Monteil, 1994, p.7, all as Wallodinium cylindricum.

NOW Wallodinium. Originally Prismatocystis (Acritarch), subsequently Hexagonifera, thirdly (and now) Wallodinium.
Taxonomic junior synonym: Fromea (now Andreedinium) elongata, according to Duxbury (1983, p.68) — however, Feist-Burkhardt and Monteil in Feist-Burkhardt (1990, p.615) retained Fromea (as Andreedinium) elongata.

Holotype: Habib, 1970, pl.10, fig.2
Age: Albian-Cenomanian