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Title: From one to six: unrecognized species diversity in the genus Acantholichen (lichenized Basidiomycota: Hygrophoraceae). Author: Dal-Forno M, Lücking R, Bungartz F, Yánez-Ayabaca A, Marcelli MP, Spielmann AA, Coca LF, Chaves JL, Aptroot A, Sipman HJ, Sikaroodi M, Gillevet P, Lawrey JD. Journal: Mycologia; 2016; 108(1):38-55. PubMed ID: 26577612. Abstract: We present a taxonomic revision of the lichenized basidiomycete genus Acantholichen, species of which produce a characteristic blue-gray, microsquamulose thallus with spiny apical hyphal cells known as acanthohyphidia. Since its discovery, the genus was thought to be monospecific, only including the generic type, A. pannarioides. However, a detailed morphological and anatomical study of recently collected specimens from the Galápagos, Costa Rica, Brazil and Colombia, combined with a molecular phylogenetic analysis of the internal transcribed spacer (ITS1-5.8S-ITS2) region and 28S of the nuc rDNA and RPB2 sequences, revealed a much more diverse and widespread species assemblage. Based on the results of these analyses, we describe five new species in the genus: A. albomarginatus, A. campestris, A. galapagoensis, A. sorediatus and A. variabilis. We also provide an identification key to all species, anatomical and morphological descriptions, photographs and a table comparing main characters of each species.[Abstract] [Full Text] [Related] [New Search]