Ambonosphaera calloviana
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*calloviana Fensome, 1979, p.51–54, pl.7, figs.3,5–6,8–9; text-figs.16A–D,17A–B. Holotype: Fensome, 1979, pl.7, figs.3,6,9; text-figs.16B–C; Fensome et al., 1993a, figs.1–3,7–8 — p.1007. Originally (and now) Ambonosphaera, subsequently Polygonifera. Prauss (1989, p.31) retained this species in Ambonosphaera. Age: early Callovian.
