- Coscinodiscus trapeziformis var. grandis N.V. Rubina
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Nov. Sist. Nizsh. Rast [Bot. Inst. Akad. Nauk SSSR] 13: 58, pl. III: figs. 4-6.
1976.
(R)
Type locality: Russia: Siberia Tyumenskaya distr.: river Ob: Curgut
upper Oligocene
Collector: Yu. F. Zakharov
(1962)
See Actinocyclus trapeziformis var. grandis (N.V. Rubina) N.V. Rubina & G.K. Khursevich 1990
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