Acanthothecis sarcographoides (Ascomycota: Graphidaceae), a morphologically unique, new lichen species in the Atlantic Forest of northeastern Brazil

• Main Authors: Marcela Eugenia da Silva Cáceres, Robert Lücking
• Format: Article
• Language: English
• Published: Sociedade Botânica do Brasil 2013-09-01
• Series: Acta Botânica Brasílica
• Subjects: Mata do Crasto; Santa Luzia do Itanhy; Sergipe
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300002&lng=en&tlng=en

A new species of Acanthothecis is described in the Atlantic Forest of northeastern Brazil. Unlike any other species in the genus, it has distinctly pseudo-stromatic ascomata that resemble those of the genus Sarcographa. However, its apically spinulose paraphyses, I-negative ascospores with thin endospore closely resemble those of other Acanthothecis species. A previous molecular phylogenetic analysis places the new species close to the type species of Acanthothecis, A. hololeucoides. The discovery of this unique new species underscores the importance of thorough biotic surveys in the Atlantic Forest of Brazil, where it is likely that many more unknown lichen species await discovery.