Microdinium smolenskiense

"?smolenskiense" (Vozzhennikova, 1967, p.93, pl.34, figs.1–6; pl.35, fig.6; pl.36, fig.4) Lentin and Williams, 1973, p.95.  Emendation: Lentin and Vozzhennikova, 1990, p.112, as Rhiptocorys smolenskiensis.  Holotype: Vozzhennikova, 1967, pl.36, fig.4, lost according to Lentin and Vozzhennikova (1990, p.112).  Lectotype: Lentin and Vozzhennikova, 1990, pl.13, figs.1–3; text-fig.65, designated by Lentin and Vozzhennikova (1990, p.112).  NOW Rhiptocorys.  Originally Ceratocorys (Appendix B), subsequently Microdinium, thirdly Microdinium?, fourthly (and now) Rhiptocorys.  Questionable assignment: Stover and Evitt (1978, p.66) as a problematic species.  Taxonomic senior synonym: Micrhystridium (as Phanerodinium, now Rhiptocorys) veligera, according to Below (1987b, p.56) — however, Lentin and Vozzhennikova (1990, p.112) retained Ceratocorys (as Rhiptocorys) smolenskiensis.  Age: Late Cretaceous.

Parent: Microdinium