Pyxidinopsis pachyderma (Jiabo, 1978, p.111, pl.41, figs.10–12; pl.46, figs.2a–b) Pan Zhaoren in Xu Jinli et al., 1997, p.71. Holotype: Jiabo, 1978, pl.41, fig.12. Originally Dictyotidium (acritarch genus), subsequently (and now) Pyxidinopsis. Age: late Oligocene.