Xanthidium crassipes Appendix A

"crassipes" Reade, 1839, pl.9, figs.2-5.  Emendation: Lejeune-Carpentier and Sarjeant, 1981, p.10, as Hystrichokolpoma? crassipes.  Holotype: Reade, 1839, pl.9, fig.2, lost according to Lejeune-Carpentier and Sarjeant (1981, p.11).  Neotype: Lejeune-Carpentier, 1941, fig.9; Lejeune-Carpentier and Sarjeant, 1981, pl.3, fig.3; text-fig.6; designated by Lejeune-Carpentier and Sarjeant (1981, p.11).  NOW Hystrichokolpoma.  Originally Xanthidium, subsequently Hystrichosphaeridium, thirdly Litosphaeridium?, fourthly (and now) Hystrichokolpoma.  Taxonomic junior synonym: Hystrichosphaeridium (as Pervosphaeridium, now Raetiaedinium) truncigerum, by implication in Yun Hyesu (1981, p.27), who considered Pervosphaeridium truncigerum to be the senior name - however, Lentin and Williams (1985, p.282) retained Pervosphaeridium truncigerum.  Age: Late Cretaceous.

Parent: Xanthidium