Impletosphaeridium sarmentum
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"sarmentum" (Stancliffe, 1991, p.187-188, pl.1, figs.1-2; pl.2, fig.6; text-figs.5A-B) Williams et al., 1998, p.335. Holotype: Stancliffe, 1991, pl.1, figs.1-2; text-figs.5A-B. NOW Downiesphaeridium. Originally Cleistosphaeridium, subsequently Impletosphaeridium, thirdly (and now) Downiesphaeridium. N.I.A. Age: Late Oxfordian.
Parent: Impletosphaeridium
