Kallosphaeridium helbyi subsp. psilatum

subsp. psilatum (Burger, 1980a, p.71, pl.25, figs.5-11) Lentin and Williams, 1989, p.206.  Holotype: Burger, 1980a, pl.25, fig.10.  Originally Canningia? minor var. psilata, subsequently Canningia? minor subsp. psilata, thirdly Chytroeisphaeridia minor subsp. psilata, fourthly (and now) Kallosphaeridium? helbyi subsp. psilatum.  Age: Aptian-Albian. Parent: Kallosphaeridium helbyi