Hystrichosphaeridium asteriodeum (Maslov, 1956) Deflandre and Deflandre-Rigaud 1958

Now Baltisphaeridium asteroideum. Originally Hystrichosphaera asteroidea, subsequently Hystrichosphaeridium asteroideum, thirdly Baltisphaeridium hirsutoides forma asteroideum, fourthly (and now) Baltisphaeridium asteroideum.

Holotype: Maslov, 1956, pl.86, fig.13
Age: Late Cretaceous