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Entomopathogens of Amazonian stick insects and locusts are members of the Beauveria species complex (Cordyceps sensu stricto)

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  • In the Amazon the only described species of Cordyceps sensu stricto (Hypocreales, Cordycipitaceae) that parasitize insects of Orthopterida (orders Orthoptera and Phasmida) are Cordyceps locustiphila and C. uleana. However, the type specimens for both taxa have been lost and the concepts of these species are uncertain. To achieve a more comprehensive understanding of the systematics of these species, collections of Cordyceps from the Amazon regions of Colombia, Ecuador and Guyana were subjected to morphological, ecological and molecular phylogenetic studies. Phylogenetic analyses were conducted on partial sequences of SSU, LSU, TEF, RPB1 and RPB2 nuclear loci. Two new species are proposed including C. diapheromeriphila, a parasite of Phasmida, and C. acridophila, a parasite of the superfamily Acridomorpha (Orthoptera), which is broadly distributed across the Amazon. For C. locustiphila a lectotypification and an epitypification are made. Cordyceps locustiphila is host specific with Colpolopha (Acridomorpha: Romaleidae), and its distribution coincides with that of its host. The phylogenetic placement of these three species was resolved with strong support in the Beauveria clade of Cordyceps s. str. (Cordycipitaceae). This relationship and the morphological similarity of their yellow stromata with known teleomorphs of the clade, suggest that the holomorphs of these species may include Beauveria or Beauveria-like anamorphs. The varying host specificity of the beauverioid Cordyceps species suggest the potential importance of identifying the natural host taxon before future consideration of strains for use in biological control of pest locusts.
  • This is the publisher’s final pdf. The article is copyrighted by the Mycological Society of America and published by Allen Press Inc. It can be found at: http://www.mycologia.org/.
  • Keywords: Host specificity, Anamorph-teleomorph connection, Entomopathogenic fungi, Phylogeny, Orthoptera, Neotropics
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  • Sanjuan, T., Tabima, J., Restrepo, S., Læssøe, T., Spatafora, J. W., & Franco-Molano, A. E. (2014). Entomopathogens of Amazonian stick insects and locusts are members of the Beauveria species complex (Cordyceps sensu stricto). Mycologia, 106(2), 260-275. doi:10.3852/106.2.260
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  • 106
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  • 2
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  • The photographs of C. acridophila and C. diapheromeriphila were supplied by Thomas Læssøe and Jens H. Petersen from the Fungi of Ecuador Project (http://www.mycokey.com/Ecuador.html) financially supported by Danish foreign aid organization (RUF). This research also was supported financially by the National Science Foundation in the form of a PEET grant to Joseph W. Spatafora (DEB-0529752). This report is a partial result from the project, ‘‘The phylogenetic relationship of Cordyceps in the Insecta class in the Amazon of Colombia’’, by the authors and financed by COLCIENCIAS (Department of Science and Technology of Colombia) 4892009.
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