Palaeostomocystis cretacea (O. Wetzel, 1933) Deflandre, 1937

Originally Trachelomonas? (an extant algal genus), subsequently (and now)
Palaeostomocystis. Stover and Evitt, 1978 considered this species to be an acritarch.
Holotype: O. Wetzel, 1933, pl.2, fig.28
Age: Late Cretaceous