Wallodinium cylindricum
From dinoflaj3
cylindricum (Habib, 1970, p.374, pl.10, fig.2) Duxbury, 1983, p.68. Emendations: Prauss, 1989, p.47–48; Riding, 1994, p.18; Feist-Burkhardt and Monteil, 1994, p.7, all as Wallodinium cylindricum. Holotype: Habib, 1970, pl.10, fig.2. Originally Prismatocystis (Appendix A), subsequently Hexagonifera, thirdly (and now) Wallodinium. Taxonomic junior synonym: Fromea (as Wallodinium, now Phallocysta) elongata, according to Duxbury (1983, p.68) — however, Feist-Burkhardt and Monteil in Feist-Burkhardt (1990, p.615) retained Fromea (as Andreedinium) elongata. Age: Albian–Cenomanian.