From Fensome et al., 2019:
Raetiaedinium truncigerum (Deflandre, 1937b, p.71–72, pl.13 [also labelled pl.10], figs.6–7) Kirsch, 1991, p.126. Holotype: Deflandre, 1937b, pl.13 (also labelled pl.10), fig.6. Originally Hystrichosphaeridium, subsequently Litosphaeridium?, thirdly Cordosphaeridium, fourthly Exochosphaeridium, fifthly Pervosphaeridium, sixthly Tityrosphaeridium?, seventhly Florentinia, eighthly Pervosphaeridium?, ninthly (and now)Raetiaedinium.Taxonomic senior synonym: Xanthidium (now Hystrichokolpoma) crassipes, by implication in Yun Hyesu (1981, p.27), who considered Hystrichosphaeridium (as Pervosphaeridium, now Raetiaedinium) truncigerum to be the senior name — however, Lentin and Williams (1985, p.282) retained Hystrichosphaeridium (as Pervosphaeridium, now Raetiaedinium) truncigerum. Taxonomic junior synonym: Laticavodinium latispinosum (name not validly published), according to Slimani (2001a, p.194). Age: Senonian.

---------------------------------------------------------------------------------------------------

G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP
Raetiadinium truncigerum (Deflandre, 1937b) Kirsch, 1991. See genus.
Strongly fibrous wall, with striations running from processes on cyst surface. According to Deflandre (1937), size with processes is 75-80 µm.