Prodromus of a fern flora of Bolivia. XLII. Update I.

We here provide a taxonomic and nomenclatural update of the Prodromus of the Bolivian fern flora published between 2017 and 2019. We describe one new species (Elaphoglossum neglectum F.B.Matos & R.C.Moran), provide four new combinations (Argyrochosma flavens (Sw.) A.R.Sm. & M.Kessler, Ceradenia werffii (L.E.Bishop) A.R.Sm. & M.Kessler, Enterosora dudleyi (L.E.Bishop) A.R.Sm. & M.Kessler, Phlegmariurus aristei (Nessel) B.Ollg.), report 13 new species records for Bolivia, delete 4 species from the Bolivian list, and update the names of 17 species previously known from Bolivia. With these new records and species, the number of fern and lycophyte species known from Bolivia increases by 10 to 1210.