Hystrichosphaeridium magnarmatum
From dinoflaj3
"magnarmatum" Tasch in Tasch et al., 1964, p.192, pl.1, fig.22. Holotype: Tasch et al., 1964, pl.1, fig.22. Taxonomic senior synonym: Hystrichosphaeridium (now Kiokansium) unituberculatum, according to Stover and Evitt (1978, p.267). Age: Albian.
Parent: Hystrichosphaeridium