Nematosphaeropsis rigida
From dinoflaj3
rigida Wrenn, 1988, p.144,146,148, pl.2, figs.1–6; pl.3, fig.4; pl.4, figs.1–5; pl.6, figs.3–4. Holotype: Wrenn, 1988, pl.2, figs.1–6. Head and Westphal (1999, p.12) considered this species to be a questionable taxonomic junior synonym of Nematosphaeropsis balcombiana. Age: Miocene–Holocene.
Parent: Nematosphaeropsis