Tanyosphaeridium tenerum Benedek, 1972, p.35, pl.10, figs.13–14; text-fig.14. Emendation: Benedek and Sarjeant, 1981, p.347–348, as Distatodinium tenerum.

Now Distatodinium. Originally Tanyosphaeridium, subsequently (and now) Distatodinium.

Holotype: Benedek, 1972, pl.10, fig.13; Benedek and Sarjeant, 1981, fig.1/5
Paratype: Benedek, 1972, pl.10, fig.14
Locus typicus: Toenisberg, Lower Rhine Region, Germany
Stratum typicum: Middle Oligocene
Translation Benedek, 1972: LPP

Original description: Benedek, 1972, p. 35-36
Diagnosis: A species of the genus Tanyosphaeridium with delicate wall, with a weakly granulate surface and very short processes.
Description: The elongate calsule with thin wall has a weakly granulate, locally also smooth surface. From it, 6 to 12 µm high and fairly equidistant, hollow processes emerge, which, in places, do not follow a strict order and also vary in appearance. The shafts are broad or slender and mostly have a broadened base, which in some cases is fused with the neighbouring processes. After an initial narrowing, the processes broaden and branch diatally into shirt, pointed thorns. It concerns similar processes as in T. paradoxum.
Through detachment of an apical calotte the pylome is delivered. An isolated polar calotte has never been observed.
Dimensions: capsule length 76 µm (75/85 µm), capsule width 42 µm (38/48 µm), process length 8 µm (5/12 µm). 10 measurements. 19 specimens studied.