Cleistosphaeridium tribuliferum
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"?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
