Cleistosphaeridium tribuliferum

"?tribuliferum" (Sarjeant, 1962a, p.487–488, pl.70, fig.4; text-figs.6c,7) Davey et al., 1969, p.16.  Holotype: Sarjeant, 1962a, pl.70, fig.4; Fauconnier and Masure, 2004, pl.23, fig.11.  NOW Downiesphaeridium.  Originally Baltisphaeridium (Appendix A), subsequently Cleistosphaeridium, thirdly Cleistosphaeridium?, fourthly Impletosphaeridium, fifthly (and now) Downiesphaeridium.  Questionable assignment: Stover and Evitt (1978, p.32).  This combination was not validly published in Davey et al. (1966, p.170), since these authors did not fully reference the basionym.  Age: Oxfordian.

Parent: Cleistosphaeridium