Oligosphaeridium minus

minus Jiabo, 1978, p.72, pl.26, figs.5–6.  Holotype: Jiabo, 1978, pl.26, fig.6.  Originally Oligosphaeridium, subsequently (and now) Oligosphaeridium?.  Questionable assignment: Fauconnier and Cornu in Fauconnier and Masure (2004, p.404) as a problematic species; however, He Chengquan et al. (2009, p. 116) included this species in Oligosphaeridium without question.  Taxonomic junior synonyms: Oligosphaeridium panjinense and Bipolaribucina pusilla, both according to He Chengquan et al. (2009, p. 116).  N.I.A.  Age: Early Tertiary.

Parent: Oligosphaeridium