Adnatosphaeridium speciosum

?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