Lagenadinium callovianum
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"*callovianum" Piel, 1985, p.108,110,112, pl.1, figs.1-9; pl.2, figs.1-8; pl.3, figs.1-5; text-figs.1a-d,2a-c,3 (part). Holotype: Piel, 1985, pl.1, figs.1-6; Fensome et al., 1993a, figs.1-3 - p.1011. NOW Stephanelytron. Originally Lagenadinium, subsequently (and now) Stephanelytron. Age: Mid to Late Callovian.
