Unraveling the Parablechnum cordatum (Blechnaceae: Polypodiopsida) complex puzzle
Abstrak
Abstract Parablechnum cordatum (Blechnaceae) exhibits significant morphological variability, with many species considered as its synonyms, and is treated as a species complex by several authors. In this study, we offer a comprehensive revision of the taxon and an updated circumscription of Parablechnum usterianum, a species frequently confused with P. cordatum, leading to a refined understanding of species delimitation. Our analysis, based on morphological and spore micro- and ultrastructural examination of Brazilian specimens within the complex, recognizes three distinct species: Parablechnum cordatum s.s., Parablechnum brasiliense, and Parablechnum regnellianum, the latter being treated as a synonym but now resurrected with a new combination. Here, we present a key to the species, along with detailed descriptions, diagnostic images, distribution maps, lectotypifications, synonymies, and nomenclatural clarifications.
Topik & Kata Kunci
Penulis (2)
Giesta Maria Olmedo Machado
André Luís de Gasper
Akses Cepat
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1590/1677-941x-abb-2023-0240
- Akses
- Open Access ✓