Baltisphaeridium longifurcatum, (Firtion, 1952), Downie and Sarjeant, 1965

Now Surculosphaeridium?. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Surculosphaeridium, fourthly (and now) Surculosphaeridium?. This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.

Holotype: Firtion, 1952, pl.9, fig.1
Age: Cenomanian