Vozzhennikovia filigrana

"?filigrana" (Benedek, 1972, p.12-13, pl.4, figs.3a-b) Lentin and Williams, 1976, p.67.  Holotype: Benedek, 1972, pl.4, figs.3a-b; Benedek and Sarjeant, 1981, figs.4,8, nos.1-2.  NOW Phthanoperidinium.  Originally Deflandrea?, subsequently Vozzhennikovia?, thirdly Dioxya, fourthly (and now) Phthanoperidinium.  Questionable assignment: Lentin and Williams (1976, p.67).  Age: mid Oligocene.

Parent: Vozzhennikovia