Nyktericysta microreticulata subsp. circularis He Chengquan et al., 1992, p.186,193, pl.1, figs.13–15.

NOW Quantouendinium microreticulatum subsp. circulare. Originally Nyktericysta microreticulata subsp. circularis, subsequently (and now) Quantouendinium microreticulatum subsp circulare.
Taxonomic senior synonym: Nyktericysta (now Quantouendinium) microreticulata, according to Mao Shaozhi et al. (1999, p.157); however, He Chengquan et al. (2009, p.305) retained this taxon as Quantouendinium microreticulatum subsp. circulare.

Holotype: He Chengquan et al., 1992, pl.1, fig.13; Gao Ruiqi et al., 1992b, pl.3, fig.7.
Age: Albian.