From Fensome et al., 2019:
Deflandrea hialina Balteş, 1969, p.34, pl.1, figs.3–4 ex Lentin and Williams, 1973, p.41. Holotype: Balteş, 1969, pl.1, fig.4,
designated by Lentin and Williams (1973, p.41). This name was not validly published in Balteş (1969, p.34), since
that author considered the name to be provisional. Age: Oligocene–Early Miocene.

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Original description: [Baltes, 1969] (translated from French):

Deflandrea hialina (provisional determination)
(PI. I, fig. 3, 4)
Description: Cave-type cyst, 55-60 microns long. Periphragm forming a subspherical or ovoidal outer covering. Apical horn practically nonexistent, although vaguely outlined in some specimens. Antapical horns forming a very large angle between their axes, in some specimens they are even joined. Periphragm smooth and hyaline. Archaeopyle trapezoidal, elongated relative to the base. High frequency.
Age and locality: Oligocene sandy marls and tuffs, Lower Miocene conglomerates, Pre-Carpathian Depression, Rimnicu Vilcea Zone.