Kallosphaeridium helbyi subsp. helbyi

subsp. helbyi.  Autonym.  Holotype: Cookson and Hughes, 1964, pl.8, fig.1.  Originally Canningia? minor subsp. minor, subsequently Chytroeisphaeridia minor subsp. minor, thirdly (and now) Kallosphaeridium? helbyi subsp. helbyi.  Age: late Albian–early Cenomanian.

Parent: Kallosphaeridium helbyi