Prolixosphaeridium spissum
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"?spissum" (McIntyre and Brideaux, 1980, p.20, pl.7, figs.1-9) Lentin and Williams, 1981, p.234. Holotype: McIntyre and Brideaux, 1980, pl.7, figs.1-4. NOW Prolixosphaeridiopsis (Appendix A). Originally Cleistosphaeridium, subsequently Prolixosphaeridium?, thirdly (and now) Prolixosphaeridiopsis (Appendix A). Questionable assignment: Lentin and Williams (1981, p.234). Age: Valanginian.
Parent: Prolixosphaeridium
