Yolkinigymnium lanceolatum
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*lanceolatum (May, 1977, p.115, pl.2, figs.9–10) Lentin and Vozzhennikova, 1990, p.30. Holotype: May, 1977, pl.2, figs.9–10; Lentin and Vozzhennikova, 1990, Appendix A, fig.41. Originally Dinogymnium, subsequently (and now) Yolkinigymnium. Age: late Campanian–early Maastrichtian.
Parent: Yolkinigymnium