Nyktericysta spinosa (Gao Ruiqi et al., 1992a, p.18,24, pl.1, figs.17–18) Williams et al., 2017. Emendation: Mao Shaozhi et al., 1999, p.157, as Quantouendinium spinosum. Holotype: Gao Ruiqi et al., 1992a, pl.1, fig.17; Gao Ruiqi et al., 1992b, pl.8, fig.1; Mao Shaozhi et al., 1999, pl.4, fig.2. Originally Balmula, subsequently Quantouendinium, thirdly (and now) Nyktericysta. Age: Campanian.