Polyphlebium tenuissimum

Polyphlebium tenuissimum, synonym Trichomanes tenuissimum, is a species of fern in the family Hymenophyllaceae. It is endemic to Ecuador. In 2006, in a taxonomic revision of the family Hymenophyllaceae, Ebihara et al. assigned this species to the genus "Polyphlebium" rather than "Trichomanes". However the combination does not appear to have been formally published; hence the "comb. ined." ("combinatio inedita") in the "Checklist of Ferns and Lycophytes of the World".