Petalodinium rhomboideum subsp. ovale
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subsp. ?ovale (Andreeva-Grigorovich and Savitskaya, 1993, p.44-45, pl.1, figs.5,7-8) Williams et al., 2015, p.308. Holotype: Andreeva-Grigorovich and Savitskaya, 1993, pl.1, fig.5; Andreeva-Grigorovich et al., 2011, pl.20, fig.2. Originally Dracodinium rhomboideum? subsp. ovale, subsequently (and now) Petalodinium rhomboideum? subsp. ovale. Questionable assignment: Williams et al. (2015, p.308). Andreeva-Grigorovich and Savitskaya (1993) cited this taxon as "Dracodinium rhomboideum subsp. ovale (Grigorovich, 1971) emend. Andreeva-Grigorovich and Savitskaya". However, Rhombodinium rhomboideum forma ovale was not validly published in Grigorovich (1971), since that author did not provide a description. Age: Early Eocene.
Parent: Petalodinium rhomboideum