Abstract

AbstractThe phylogeny of theMicarea prasinagroup was investigated using mitochondrial small subunit ribosomal DNA sequences from 14 taxa representing this group, four other members of the genusMicarea, andPsilolechia lucidaas an outgroup. A total of 31 new mtSSU rDNA sequences were generated, including 10 from theM. micrococcacomplex. Bayesian, maximum parsimony (MP) and maximum likelihood (ML) methods were used to analyse the data. The results show thatM. micrococcais not monophyletic and forms three strongly supported lineages: 1)M. micrococcas. str., 2)M. byssacea(Th. Fr.) Czarnota, Guzow-Krzemińska & Coppins comb. nov., and 3) a putative taxon that requires further studies.Micarea viridileprosais a sister species toM. micrococcas. str. and the recently describedM. nowakiiis a sister species toM. prasinas. str. The placement ofM. tomentosawithin theM. prasinagroup is confirmed.Micarea hedlundiiappears to be more closely related to theM. micrococcacomplex thanM. prasinas. str. Descriptions, illustrations, taxonomic remarks, distribution and habitat data forM. micrococcas. str. andM. byssaceaare provided. A lectotype forBiatora byssaceaHampe non Zwackh and a neotype forCatillaria prasinaβ [var.]byssaceaare selected.

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