From Fensome et al., 2019:
Rhombodinium magnum Vasilyeva, 2013, p.121–122, pl.4, figs.1–3 ex Williams and Fensome, 2016, p.14. Holotype: Vasilyeva, 2013, pl.4, fig.1, designated by Williams and Fensome (2016, p.141). The name Rhombodinium magnum was not validly published in Vasilyeva (2013), since that author referred to two separate specimens as the holotype (on p. 121 as pl.4, fig. 3 and in the plate caption as pl.4, fig.1). Age: Bartonian.

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