Hystrichosphaeridium tubiferum var. brevispinum

"var. brevispinum" Davey and Williams, 1966b, p.58, pl.10, fig.10.  Emendation: Marheinecke, 1992, p.61, as Hystrichosphaeridium proprium subsp. brevispinum.  Holotype: Davey and Williams, 1966b, pl.10, fig.10; Bujak et al., 1980, pl.8, figs.10–12; Fauconnier and Masure, 2004, pl.47, figs.1–4.  NOW Hystrichosphaeridium tubiferum subsp. brevispinum.  Originally Hystrichosphaeridium tubiferum var. brevispinum, subsequently (and now) Hystrichosphaeridium tubiferum subsp. brevispinum, thirdly Hystrichosphaeridium proprium subsp. brevispinum.  Taxonomic senior synonym: Micrhystridium (as Dapsilidinium?, now Litosphaeridium) fucosum, according to Below (1982c, p.29) — however, Lentin and Williams (1993, p.336) retained Hystrichosphaeridium tubiferum subsp. brevispinum.  Age: early Eocene.

Parent: Hystrichosphaeridium tubiferum