Hystrichosphaeridium recurvatum subsp. parvum

subsp. parvum (Rozen, 1965, p.303–304, pl.4, fig.6; text-fig.13) Lentin and Williams, 1973, p.79.  Holotype: Rozen, 1965, pl.4, fig.6; text-fig.13.  Originally Hystrichosphaeridium recurvatum var. parvum, subsequently (and now) Hystrichosphaeridium recurvatum subsp. parvum, thirdly Hystrichosphaeridium palmatum subsp. parvum (combination illegitimate), fourthly Hystrichosphaeridium duplum subsp. parvum (combination illegitimate).  Age: late Eocene.

Parent: Hystrichosphaeridium recurvatum