Hystrichosphaeridium marsupium
From dinoflaj2
"marsupium" Tasch in Tasch et al., 1964, p.193, pl.3, fig.16. Holotype: Tasch et al., 1964, pl.3, fig.16. Originally Hystrichosphaeridium, subsequently Polysphaeridium?. Taxonomic senior synonym: Hystrichosphaeridium (now Kiokansium) unituberculatum, according to Stover and Evitt (1978, p.267). Age: Albian.
Parent: Hystrichosphaeridium
