Acanthodiacrodium echinulatum, (Deflandre, 1937b, p. 55), Deflandre, 1966, p. 5.

Combination not validly published: basionym not fully referenced.

NOW Diacrocanthidium. Originally Palaeostomocystis, subsequently Acanthodiacrodium (combination not validly published), thirdly (and now) Diacrocanthidium.
Tax. jr. syn.: Cleistosphaeridium parvum, according to Bujak in Bujak et al. (1980, p.52).

Holotype: Deflandre, 1937b, pl.11 (al. pl.8), fig.9, lost according to Deflandre and Foucher (1967, p.4).
Neotype: Deflandre and Foucher, 1967, pl.1, fig.6, designated by Deflandre and Foucher (1967, p.4).
Age: Late Cretaceous.