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Taxonomy of the corticolous, shrubby, esorediate, neotropical species of Usnea Adans. (Parmeliaceae) with an emphasis on southern Brazil

Published online by Cambridge University Press:  30 May 2017

Alice da Cruz Lima GERLACH ,
Philippe CLERC  and
Rosa Mara BORGES DA SILVEIRA
Alice da Cruz Lima GERLACH
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Biociências, Departamento de Botânica, Laboratório de Micologia, Av. Bento Gonçalves, 9500 Campus do Vale, CEP: 91501-970, Porto Alegre/RS, Brazil. Email: [email protected] Conservatoire et Jardin botaniques de la Ville de Genève, 1 ch. de l’Impératrice, 1292 Chambésy/GE, Switzerland
Philippe CLERC
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, 1 ch. de l’Impératrice, 1292 Chambésy/GE, Switzerland
Rosa Mara BORGES DA SILVEIRA
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Biociências, Departamento de Botânica, Laboratório de Micologia, Av. Bento Gonçalves, 9500 Campus do Vale, CEP: 91501-970, Porto Alegre/RS, Brazil. Email: [email protected]
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Abstract

Seventeen corticolous shrubby apotheciate Usnea species without vegetative propagules are reported from Brazil, including five species that are new to science: Usnea aurantiaca-parvula A. Gerlach & P. Clerc (characterized by an orange medulla and lageniform spinulose fibrils), U. cirrosa Motyka, U. cladocarpa Fée (syn. nov.: U. ramillosa Motyka), U. concinna Stirton (lectotype designated here, syn. nov. U. radiata Stirton, U. florida var. scabrosa Zahlbr.), U. cristatula Motyka, U. erinacea Vain., U. fleigiae A. Gerlach & P. Clerc (characterized by large spores and a thin, lax medulla), U. grandispora A. Gerlach & P. Clerc (characterized by large spores, a black base and protocetraric or salazinic acids in the medulla), U. kalbiana P. Clerc & A. Gerlach (characterized by a vitreous cortex and annular cracks in the basal part), U. lunaria Motyka, U. meridionalis Zahlbr. (syn. nov.: U. michauxii I. I. Tav.), Usnea cf. moreliana Motyka, U. parvula Motyka, U. steineri Zahlbr, U. subelegans (Vain.) B. de Lesd. (lectotype designated here), U. subparvula A. Gerlach & P. Clerc (characterized by spinulose fibrils and protocetraric acid in the medulla) and one as yet unidentified species (named Usnea sp. 1). Usnea cirrosa, U. cristatula and U. erinacea are new records for Brazil. A full description with morphological, anatomical (CMA and ascospores) and chemical features (TLC), as well as geographical distribution, is provided for each species along with an identification key to all species reported. Molecular data from the ITS rDNA, RPB1 and Mcm7 markers are present for most taxa, except for U. concinna, U. cristatula, U. kalbiana, U. lunaria, U. cf. moreliana and U. subelegans.

Keywords

anatomyascosporeslichensmorphologyphylogeneticsthin-layer chromatography
Type
Articles
Information
The Lichenologist , Volume 49 , Issue 3 , May 2017 , pp. 199 - 238
Copyright
© British Lichen Society, 2017 

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