title: Pseudocospeciation of the mycoparasite Cosmospora with their fungal hosts.
abstract: Species of Cosmospora are parasites of other fungi (mycoparasites), including species belonging to the Xylariales. Based on prior taxonomic work, these fungi were determined to be highly host specific. We suspected that the association of Cosmospora and their hosts could not be a result of random chance, and tested the cospeciation of Cosmospora and the their hosts with contemporary methods (e.g., ParaFit, PACo, and Jane). The cophylogeny of Cosmospora and their hosts was found to be congruent, but only host-parasite links in more recent evolutionary lineages of the host were determined as coevolutionary. Reconciliation reconstructions determined at least five host-switch events early in the evolution of Cosmospora. Additionally, the rates of evolution between Cosmospora and their hosts were unequal. This pattern is more likely to be explained by pseudocospeciation (i.e., host switches followed by cospeciation), which also produces congruent cophylogenies.
authors.affiliation: Department of Plant Science and Landscape Architecture University of Maryland 2112 Plant Sciences Building College Park Maryland 20742 United States.
authors.forename: Cesar S
authors.initials: CS
authors.lastname: Herrera
authors.affiliation: Department of Clinical Plant Science, Faculty of Bioscience Hosei University 3-7-2 Kajino-cho Koganei Tokyo Japan.
authors.forename: Yuuri
authors.initials: Y
authors.lastname: Hirooka
authors.affiliation: Department of Plant Science and Landscape Architecture University of Maryland 2112 Plant Sciences Building College Park Maryland 20742 United States; Escuela de Biología Universidad de Costa Rica Apartado 11501-2060 San Pedro San José Costa Rica.
authors.forename: Priscila
authors.initials: P
authors.lastname: Chaverri
keywords: Ascomycota; Nectria; Nectriaceae; coevolution; fungal host; fungal parasite