Adnatosphaeridium perforatum

"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