Hystrichokolpoma proprium (Marheinecke, 1992, p.60-61, pl.11, figs.4-8) Foucher in Fauconnier and Masure, 2004, p.283. Holotype: Marheinecke, 1992, pl.11, figs.4-6; Fauconnier and Masure, 2004, pl.40, figs.1-3. Originally Hystrichosphaeridium, subsequently (and now) Hystrichokolpoma. Contrary to the opinion of Lentin and Williams (1993, p.327), Williams et al. (1998, p.310) considered the name Hystrichosphaeridium proprium to be validly published. Age: Late Maastrichtian.