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Sánchez, C.: A new filmy fern species and new unispecific section of Trichomanes (Hymenophyllaceae) (“filmy ferns”) from Cuba. — Willdenowia 31: 125–127. 2001. — ISSN 0511-9618. Trichomanes caluffii is newly described from the mountains of northeastern Cuba. It is characterised by the absence of blackish (fasciculate, forked or simple) marginal trichomes or marginal scales, lack of a false submarginal vein, scarceness and reduced size of the false veinlets, and large pluricellular rhizoids with but light pigmentation. By these features it is distinct from all other species and recognised sections of T. subg. Didymoglossum, which is why it is considered as constituting a section of its own, T. sect. Reducta. T. caluffii is a threatened species, assigned to the critically endangered (CR) IUCN threat category.