Hystrichosphaeridium simplicispinum

"simplicispinum" Davey and Williams, 1966b, p.59–60, pl.9, fig.3.  Holotype: Davey and Williams, 1966b, pl.9, fig.3.  Originally Hystrichosphaeridium, subsequently Kleithriasphaeridium.  Taxonomic senior synonym: Hystrichosphaeridium (now Kleithriasphaeridium) eoinodes, according to Below (1982c, p.17).  Age: Barremian.

Parent: Hystrichosphaeridium