Kallosphaeridium biparatum subsp. crassum

"subsp. crassum" (Jiabo, 1978, p.52, pl.23, figs.1-4) Lentin and Williams, 1981, p.160.  Holotype: Jiabo, 1978, pl.23, fig.3.  NOW Batiacasphaera biornata subsp. crassa.  Originally Tenua biornata subsp. crassa, subsequently Kallosphaeridium biornatum subsp. crassum (combination not validly published), thirdly Kallosphaeridium biparatum subsp. crassum, fourthly (and now) Batiacasphaera biornata subsp. crassa.  Age: Early Tertiary. Parent: Kallosphaeridium biparatum