From Fensome et al., 2019:
Fibrocysta dongyingensis Xu Jinli et al., 1997, p.109–110, pl.27, fig.10 ex He Chengquan et al., 2009, p.655–656. Holotype: Xu Jinli et al., 1997, pl.27, fig.10. This name was not validly published in Xu Jinli et al. (1997), since no English or Latin description was provided: He Chengquan et al. (2009, p.655–656) validated the name by publishing an English diagnosis. Age: Middle–Late Eocene.

---------------------------------------------------------------------------------------------------