Adnatosphaeridium speciosum
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?speciosum (Alberti, 1961, p.37, pl.9, fig.13) Stancliffe and Sarjeant, 1990, p.202. Holotype: Alberti, 1961, pl.9, fig.13; Stancliffe and Sarjeant, 1990, pl.5, fig.6. Originally Cannosphaeropsis, subsequently Polystephanephorus, thirdly Cannosphaeropsis?, fourthly (and now) Adnatosphaeridium?. Questionable assignment: Stancliffe and Sarjeant (1990, p.202). Age: Bathonian–Callovian.
Parent: Adnatosphaeridium