Achomosphaera alcicornu subsp. columnaeformis

subsp. columnaeformis (Aristova, 1971, p.117-118, pl.1, fig.2) Lentin and Williams, 1989, p.3.  Holotype: Aristova, 1971, pl.1, fig.2.  Originally Achomosphaera alcicornu forma columnaeformis, subsequently (and now) Achomosphaera alcicornu subsp. columnaeformis.  Age: Eocene. Parent: Achomosphaera alcicornu