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Article << Previous     |     Next >>   Contents Vol 27(1)

Molecular phylogeny reveals the true colours of Myeloconidaceae (Ascomycota: Ostropales)

Matthew P. Nelsen A B F , Robert Lücking B , Carrie J. Andrew B , André Aptroot C , Marcela E. S. Cáceres D , Joel A. Mercado-Díaz E , Eimy Rivas Plata B and H. Thorsten Lumbsch B

A Committee on Evolutionary Biology, University of Chicago, 1025 E. 57th Street, Chicago, IL 60637, USA.
B Science & Education, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL 60605, USA.
C ABL Herbarium, Gerrit van der Veenstraat 107, NL-3762 XK Soest, the Netherlands.
D Departamento de Biociências, Universidade Federal de Sergipe, CEP: 49.500-000, Itabaiana, Sergipe, Brazil.
E Herbario, Jardín Botánico, Universidad de Puerto Rico, 1187 Calle Flamboyán, San Juan, 00926-1177, Puerto Rico.
F Corresponding author. Email: mpnelsen@gmail.com

Australian Systematic Botany 27(1) 38-47 http://dx.doi.org/10.1071/SB13040
Submitted: 11 September 2013  Accepted: 14 February 2014   Published: 30 June 2014


 
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Abstract

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.



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