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Type: Article
Published: 2017-04-13
Page range: 218–232
Abstract views: 15
PDF downloaded: 1

Two new species segregated from Hymenophyllum tunbrigense (Hymenophyllaceae) in southern South America, based on morphological, anatomical, molecular and distributional evidence

Instituto de Botánica Darwinion, Academia Nacional de Ciencias Exactas, Físicas y Naturales y CONICET, casilla de correo 22, B1642HYD San Isidro, Argentina.
Orientación Plantas Vasculares, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 km 601, X5804ZAB Río Cuarto, Córdoba, Argentina.
Instituto de Botánica Darwinion, Academia Nacional de Ciencias Exactas, Físicas y Naturales y CONICET, casilla de correo 22, B1642HYD San Isidro, Argentina.
Instituto de Botánica Darwinion, Academia Nacional de Ciencias Exactas, Físicas y Naturales y CONICET, casilla de correo 22, B1642HYD San Isidro, Argentina.
Hymenophyllum asperulum H. cordobense Pampean mountains Endemism Taxonomy Yungas Austral Andes Pteridophytes

Abstract

The cosmopolitan species Hymenophyllum tunbrigense was traditionally represented in southern South America by two allopatric varieties: H. tunbrigense var. tunbrigense in the Andean Patagonian forests of Argentina and Chile, and H. tunbrigense var. cordobense, an endemic taxon restricted to the mountain system of central and north-western Argentina. Given the diagnosable differences between these two taxa, and between these taxa and the European and African entity, based on morphological, anatomical, molecular, ecological and distributional evidence, we exclude H. tunbrigense for Southern Cone, propose to revalidate the name Hymenophyllum asperulum for the species present in the Magellanic and Valdivian forests and elevate H. tunbrigense var. cordobense to species rank. We consider these two taxa as endemic species, closely related to the widespread H. tunbrigense. We also cite Hymenophyllum cordobense for first time for the flora of Bolivia.