Adnatosphaeridium perforatum
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"perforatum" (Alberti, 1961, p.37, pl.9, fig.14) Riley and Sarjeant, 1972, p.3. Holotype: Alberti, 1961, pl.9, fig.14. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly Rigaudella. Taxonomic senior synonym: Cannosphaeropsis (now Rigaudella) filamentosa, according to Stancliffe and Sarjeant (1990, p.206). Age: ?Callovian.
Parent: Adnatosphaeridium