Achomosphaera alcicornu forma columnaeformis
From dinoflaj2
"forma columnaeformis" Aristova, 1971, p.117-118, pl.1, fig.2. Holotype: Aristova, 1971, pl.1, fig.2. NOW Achomosphaera alcicornu subsp. columnaeformis. Originally Achomosphaera alcicornu forma columnaeformis, subsequently (and now) Achomosphaera alcicornu subsp. columnaeformis. Age: Eocene. Parent: Achomosphaera alcicornu