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Background  Grammitid ferns are a tropical monophyletic clade nested in Polypodiaceae, containing more than 20 genera and more than 750 species. Many of them also grow in Taiwan. During the survey of recent two decades, an unknown grammitid fern was discovered and the taxonomic treatment is given herein.    Results  A new species, collected from Taiwan, is recognized and named, i.e.,  Xiphopterella devolii  S. J. Moore, Parris, & W. L. Chiou. The holotype is deposited in TAIF, and isotypes are in HAST, K, L, US, and TNS. It is also distributed on SE & S China. The genus  Xiphopterella  is also a new record to Taiwan.    Conclusion  A new species,  Xiphopterella devolii  S. J. Moore, Parris, & W. L. Chiou is documented herein. The  Xiphopterella  is a new recorded genus in Taiwan and is first found beyond Malesia regions.    Electronic supplementary material  The online version of this article (doi:10.1186/1999-3110-54-24) contains supplementary material, which is available to authorized users.

Xiphopterella devolii (Polypodiaceae), a new species and newly recorded genus in Taiwan