Brachysira subtile, one of four diatom species from a lake in eastern Siberia described by Potapova with collaborators P.B. Hamilton and L.I. Kopyrina. The others are Eunotia frigida Potapova, Hamilton & Kopyrina, Encyonopsis vasilievae Potapova, Hamilton & Kopyrina and Neidium rugosum Hamilton, Potapova & Kopyrina.