Tetrachacysta spinosigibberosa
From dinoflaj3
spinosigibberosa (Brideaux and Fisher, 1976, p.22–24, pl.4, fig.9; pl.5, figs.1–16) Backhouse, 1988, p.110. Holotype: Brideaux and Fisher, 1976, pl.5, figs.1,5–8. Originally Horologinella, subsequently (and now) Tetrachacysta. Age: late Oxfordian–?Portlandian.
Parent: Tetrachacysta