Yolkinigymnium elongatum
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elongatum (May, 1977, p.112,114, pl.2, figs.11-12) Lentin and Vozzhennikova, 1990, p.31. Holotype: May, 1977, pl.2, figs.11-12; Lentin and Vozzhennikova, 1990, Appendix, A, fig.42. Originally Dinogymnium, subsequently (and now) Yolkinigymnium. Age: Late Campanian-Early Maastrichtian.
Parent: Yolkinigymnium