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30 June 2014 Molecular phylogeny reveals the true colours of Myeloconidaceae (Ascomycota: Ostropales)
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The lichen-forming fungal family Myeloconidaceae, with the single genus Myeloconis, has been suggested to share affinities with Porinaceae (Lecanoromycetes: Ostropales). We examined its position relative to this family by using molecular data from the mitochondrial small-subunit and nuclear large-subunit rDNA. Our results revealed that Myeloconis forms a monophyletic group nested within Porinaceae, closely related to Porina farinosa. Neither Porina s.str. nor Clathroporina sensu Harris form monophyletic groups; instead, two strongly supported clades were recovered, which differ in ascospore septation (septate v. muriform), with the clade producing muriform ascospores including Myeloconis. We therefore reduce Myeloconidaceae to synonymy with Porinaceae; however, because generic delimitations within Porinaceae remain unclear, we retain Myeloconis as a separate genus within the family. The species concept currently used in the genus, based largely on secondary metabolites and ascospore measurements, is supported by the phylogeny.

© CSIRO 2014
Matthew P. Nelsen, Robert Lücking, Carrie J. Andrew, André Aptroot, Marcela E. S. Cáceres, Joel A. Mercado-Díaz, Eimy Rivas Plata, and H. Thorsten Lumbsch "Molecular phylogeny reveals the true colours of Myeloconidaceae (Ascomycota: Ostropales)," Australian Systematic Botany 27(1), 38-47, (30 June 2014).
Received: 11 September 2013; Accepted: 1 February 2013; Published: 30 June 2014

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