''Polyphlebium tenuissimum'',

synonym A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

''Trichomanes tenuissimum'', is a species of

fern A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except t ...

in the family

Hymenophyllaceae The Hymenophyllaceae, the filmy ferns and bristle ferns, are a family of two to nine genera (depending on classification system) and about 650 known species of ferns, with a subcosmopolitan distribution, but generally restricted to very damp pla ...

. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ''Eku ...

. In 2006, in a taxonomic revision of the family Hymenophyllaceae, Ebihara et al. assigned this species to the genus ''

Polyphlebium ''Polyphlebium'' is a fern genus in the family Hymenophyllaceae. The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) but not by some other sources. Taxonomy The genus ''Polyphlebium'' was erected by Edwin Cop ...

'' 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''.

References

Hymenophyllales Ferns of Ecuador Endemic flora of Ecuador Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN {{Polypodiidae-stub