Hystrichosphaeridium spinipansatum
From dinoflaj2
?spinipansatum (Merrill, 1895, p.17; text-fig.20) Sarjeant, 1964b, p.175. Holotype: Merrill, 1895, text-fig.20. Originally Geodia? (Appendix A), subsequently Hystrichosphaeridium, thirdly (and now) Hystrichosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.56) as a problematic species. Age: Early Cretaceous.
Parent: Hystrichosphaeridium
