From Fensome et al., 2019:
Distatodinium solidum Châteauneuf, 1980, p.137, pl.22, figs.1–2. Holotype: Châteauneuf, 1980, pl.22, fig.1; Fauconnier and
Masure, 2004, pl.22, fig.11. Age: Middle–Late Eocene (Lutetian–Ludian).

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Original description (Chateauneuff, 1980): translation PKB 2025:

Origin of the name: from the nature of the processes
Holotype: Paradis sounding, 5 m, slide 8517, coordinates: 39.9/105.3
Type locality: Paradis, Rue de Paradis, Sables de Beauchamp, Auversien
Diagnosis: Cyst with a very pronounced ovoid or ellipsoidal shape. Single-layered wall or autophragm, smooth or finely granular. Processes number fewer than 30. They do not appear to be arranged along visible parasutural structures. These processes are tabular, fairly long, and flexible. They are solid, flared at the apex, sometimes bifurcated or branched. Their base is relatively narrow. These very fine processes are solid. Apical archaeopyle, free operculum. Paracingulum and parasulcus not visible. Cyst size: 50 µm high/40 µm wide, processes 18 µm high and 1.5 µm wide. Cotype: 40/30 µm, appendages: 10 µm/1 µm.
Stratigraphy: Lutetian to base of Lundian (common).