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Dilatisphaera laevigata
Dilatisphaera laevigata Lister, 1970
Originally (and now) Dilatisphaera, subsequently Hystrichosphaeridium. Eisenack and Kjellstr÷m, 1975 transferred this species to Hystrichosphaeridium Deflandre, 1937; however, Cramer and Diez, 1979 and Fensome et al., 1990 retained it in Dilatisphaera.
Holotype: Lister, 1970, pl.6, fig.10
Age: Silurian (Wenlock)
Originally (and now) Dilatisphaera, subsequently Hystrichosphaeridium. Eisenack and Kjellstr÷m, 1975 transferred this species to Hystrichosphaeridium Deflandre, 1937; however, Cramer and Diez, 1979 and Fensome et al., 1990 retained it in Dilatisphaera.
Holotype: Lister, 1970, pl.6, fig.10
Age: Silurian (Wenlock)