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A revision of Leptogium (Collemataceae, lichenized Ascomycota) from Antarctica with a key to species

Published online by Cambridge University Press:  23 July 2018

Marcos J. KITAURA*
Instituto de Biociências, Laboratório de Ecologia e Biologia Evolutiva, Universidade Federal de Mato Grosso do Sul, Caixa Postal 549, CEP 79070–900, Campo Grande, Mato Grosso do Sul, Brazil.
Mayara C. SCUR
Instituto de Biociências, Laboratório de Ecologia e Biologia Evolutiva, Universidade Federal de Mato Grosso do Sul, Caixa Postal 549, CEP 79070–900, Campo Grande, Mato Grosso do Sul, Brazil.
Instituto de Biociências, Laboratório de Botânica/Liquenologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Caixa Postal 549, CEP 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
Instituto de Biociências, Laboratório de Ecologia e Biologia Evolutiva, Universidade Federal de Mato Grosso do Sul, Caixa Postal 549, CEP 79070–900, Campo Grande, Mato Grosso do Sul, Brazil.


With more than 180 known species, Leptogium has its greatest richness in tropical regions. Only three species have so far been reported from Antarctica but extensive surveys in the Antarctic Maritime Islands have shown that this is an underestimate. Leptogium antarcticum (non-isidiate, with medulla composed of columnar hyphae), L. marcellii (non-isidiate, with medulla composed of a sponge-like arrangement of hyphae) and L. tectum (isidiate, with medulla composed of columnar hyphae) are described here as new to science. The new species are compared with those already reported for the genus in Antarctica, namely L. crispatellum, L. menziesii and L. puberulum, and an identification key is provided. Sequences of ITS and mrSSU regions were obtained from recently collected L. antarcticum, L. marcellii, L. puberulum and L. tectum specimens. Morphological and anatomical data were compared along with available genetic data in order to delimit these species more accurately, using an integrative approach.

© British Lichen Society, 2018 

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