Polysphaeridium caminuspinum
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"?caminuspinum" (Wall, 1965a, p.165, pl.9, fig.4) Riley and Sarjeant, 1972, p.3. Holotype: Wall, 1965a, pl.9, fig.4. NOW Beaumontella?. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Dapsilidinium?, fourthly (and now) Beaumontella?. Questionable assignment: Riley and Sarjeant (1972, p.3). Taxonomic junior synonym: Cleistosphaeridium mojsisovicsii, according to Below (1987a, p.70). Age: Early Sinemurian.
Parent: Polysphaeridium