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A new riparian species of Ramalina (Ramalinaceae) from Brazil, with a key to neotropical saxicolous species

Published online by Cambridge University Press:  26 September 2018

Emerson Luiz GUMBOSKI
Affiliation:
Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Agronomia, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil. Email: emersongumboski@gmail.com
Sionara ELIASARO
Affiliation:
Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal do Paraná, 81531-980 Curitiba, Paraná, Brazil
Mayara Camila SCUR
Affiliation:
Laboratório de Evolução e Biodiversidade, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, 79070-900 Campo Grande, Mato Grosso do Sul, Brazil
Aline Pedroso LORENZ-LEMKE
Affiliation:
Laboratório de Evolução e Biodiversidade, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, 79070-900 Campo Grande, Mato Grosso do Sul, Brazil
Rosa Mara BORGES DA SILVEIRA
Affiliation:
Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Agronomia, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil. Email: emersongumboski@gmail.com

Abstract

The new species Ramalina fleigiae from Brazil is described growing on rocks in riverbeds in high altitude grasslands of southern Brazil. It grows in areas with constant water flow, sometimes almost immersed, and always in exposed habitats. Through an integrative approach, the detailed description of R. fleigiae includes morphological, anatomical, ecological, chemical and molecular data. Ribosomal DNA-based phylogenies suggest that R. fleigiae is more closely related to a species that shares its habitat preference (R. laevigata) than to the morphologically and chemically similar R. exiguella and R. gracilis. Ramalina fleigiae and R. laevigata can be distinguished by thallus morphology (irregularly flat branches in R. fleigiae vs. flat to canaliculate in R. laevigata) and pattern of chondroid tissue, as genetic distances between them are compatible with the interspecific range. It is possible that many species of Ramalina still remain hidden within the morphological or chemical variation of currently accepted species. Combining ecological, anatomical and molecular data will improve our future understanding of this genus.

Type
Articles
Copyright
© British Lichen Society, 2018 

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