Deflandrea? filigrana Benedek, 1972

Now Phthanoperidinium. Originally Deflandrea?, subsequently Vozzhennikovia?, thirdly Dioxya, fourthly (and now) Phthanoperidinium.
Benedek, 1972, questionably included this species in Deflandrea.
Holotype: Benedek, 1972, pl.4, fig.3; Benedek and Sarjeant, 1981, pl.4, fig.8, nos.1-2
Locus typicus: T÷nisberg, Lower Rhine Embayment, Germany
Stratum typicum: Middle Oligocene
Translation Benedek, 1972: LPP

Original diagnosis: Benedek, 1972, p.12
A species of the genus ?Deflandrea with one antapical horn. The thinwalled, granular capsule is circular. Trapezoid pylome developed below the apex.

Original description: Benedek, 1972, p.13
Capsule circular to elliptical with transparent, brownish surface. The smooth, thinwalled inner capusle is of ellipsoidal outline. Outer membrane closely appressed to inner membrane and densely covered by numerous irregular spines. Transverse furrow relatively wide and ventrally bordred by low ridges, which turn into the longitudinal furrow of the hypotheca. Tabulation not indicated. Apical horn short and pointed. Antapical horn weakly developed. Trapezodal pylome developed below the apex.
Dimensions: Capsule length 40-45 µm, breadth 43-45 µm, apical horn 2.5-3 µm (10 specimens).