Palaeostomocystis echinulata Deflandre, 1937

Now Diacrocanthidium. Originally Palaeostomocystis, subsequently (and now) Diacrocanthidium; see also Acanthodiacrodium (an acritarch genus; combination not validly published).
Tax. sr. synonym of Cleistosphaeridium parvum Davey, 1969, according to Bujak et al., 1980.
Holotype: Deflandre, 1937, pl.11 [al. pl.8], fig.9
Age: Late Cretaceous