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Issue: Vol. 677 No. 1: 12 Dec. 2024
Type: Article
Published: 2024-12-12
DOI: 10.11646/phytotaxa.677.1.1
Page range: 1-48
Abstract views: 278
PDF downloaded: 194

Monograph of the genera Struthiopteris Scop. and Spicantopsis Nakai (Blechnaceae, Polypodiopsida)

Department of Biodiversity, Ecology, and Evolution, Universidad Complutense de Madrid, Calle Jose Antonio Novais 12, 28040 Madrid, Spain. Department of Biosciences, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain. Department of Biology, Universidad Autónoma de Madrid, C/ Darwin 2, 28049, Madrid, Spain.
Department of Biodiversity, Ecology, and Evolution, Universidad Complutense de Madrid, Calle Jose Antonio Novais 12, 28040 Madrid, Spain.
Department of Biodiversity, Ecology, and Evolution, Universidad Complutense de Madrid, Calle Jose Antonio Novais 12, 28040 Madrid, Spain.
Department of Biodiversity, Ecology, and Evolution, Universidad Complutense de Madrid, Calle Jose Antonio Novais 12, 28040 Madrid, Spain.
Department of Biodiversity, Ecology, and Evolution, Universidad Complutense de Madrid, Calle Jose Antonio Novais 12, 28040 Madrid, Spain.
Blechnum ferns taxonomy neotype Pteridophytes

Abstract

The Blechnaceae fern family, comprising approximately 250 species, exhibits a subcosmopolitan distribution but showcases notable diversity in South America and the Austropacific region. Recent taxonomic revisions expanded the generic treatment within the family, Resulting, among other things, in the resurrection of the genus Spicantopsis. This genus, segregated from Struthiopteris, now encompasses three species endemic to East Asia. Struthiopteris, on the other hand, has three species distributed in Japan, Europe, North of Africa, and western North America. Molecular evidence, coupled with morphoanatomical traits, supported this taxonomic distinction. Despite subsequent studies on palynological and morphoanatomical characteristics, a comprehensive global monograph of Struthiopteris and Spicantopsis is lacking. This paper aims to fill this gap by synthesizing available information, providing identification keys, full descriptions, taxonomic notes, and some necessary type designation for all species within both genera. The study, based on the examination of 1,649 herbarium specimens and digital materials, underscores the importance of anatomical and morphological characters in fern taxonomy. Mapping distribution data further enhances understanding of the geographic ranges of these ferns. This comprehensive synthesis contributes to the ongoing elucidation of fern diversity and taxonomy.

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