Ovum hispidum ssp. oligospinosum Eisenack, 1934

Name not validly published since the specific name Ovum hispidum is not validly published.
Now Estiastra? oligospinosa (an acritarch species). Originally Ovum hispidum ssp. oligospinosum (name not validly published), subsequently Hystrichosphaeridium oligospinosum, thirdly Pulvinosphaeridium oligospinosum (an acritarch species), fourthly Veryhachium oligospinosum (an acritarch species), fifthly Goniosphaeridium oligospinosum (an acritarch species), sixthly (and now) Estiastra? oligospinosa (an acritarch species).

Holotype: Eisenack, 1934, pl.4, fig.18; lost, according to Eisenack et al., 1973
Age: Ordovician (Early Caradoc)