Cribroperidinium sarjeantii subsp. sphaericum

subsp. sphaericum (Vozzhennikova, 1967, p.89, pl.25, figs.1-2; pl.28, fig.4; pl.32, figs.1-4) Lentin and Williams, 1985, p.80.  Holotype: Vozzhennikova, 1967, pl.28, fig.4; Jan du Chêne et al., 1986a, pl.20, fig.9; lost according to Lentin and Vozzhennikova (1990, p.97).  Lectotype: Lentin and Vozzhennikova, 1990, pl.16, figs.1-2, designated by Lentin and Vozzhennikova (1990, p.97).  Originally Gonyaulax sarjeantii var. sphaerica (Appendix B), subsequently Gonyaulacysta sarjeantii subsp. sphaerica, thirdly Millioudodinium sarjeantii subsp. sphaericum, fourthly Rhynchodiniopsis sarjeantii subsp. sphaerica, fifthly Cribroperidinium? sarjeantii subsp. sphaericum, sixthly (and now) Cribroperidinium sarjeantii subsp. sphaericum.  Lentin and Vozzhennikova (1990, p.97-98) provided an "expanded description" for this subspecies.  Age: Tithonian.Cribroperidinium sarjeantii