From Fensome et al., 2019:
Stromaphora rotunda Xu Jinli et al., 1997, p.125, pl.8, figs.3–4 ex He Chengquan et al., 2009, p.372,673. Holotype: Xu Jinli et al., 1997, pl.8, fig.3. 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.673) validated the name by publishing an English diagnosis. Age: Middle–Late Eocene.

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