Oligosphaeridium dictyophorum

"dictyophorum" (Cookson and Eisenack, 1958, p.44, pl.11, fig.14) Davey and Williams, 1969, p.5.  Holotype: Cookson and Eisenack, 1958, pl.11, fig.14; Fensome et al., 1993a, fig.1 — p.1125.  NOW Stiphrosphaeridium.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Oligosphaeridium, fourthly (and now) Stiphrosphaeridium.  This combination, as a questionable assignment, was not validly published in Davey and Williams (1966b, p.77), since these authors did not fully reference the basionym.  Age: Late Jurassic.

Parent: Oligosphaeridium