Mycological Progress

, Volume 16, Issue 4, pp 369–391

Clavicipitaceous entomopathogens: new species in Metarhizium and a new genus Nigelia

  • J. Jennifer Luangsa-ard
  • Suchada Mongkolsamrit
  • Donnaya Thanakitpipattana
  • Artit Khonsanit
  • Kanoksri Tasanathai
  • Wasana Noisripoom
  • Richard A. Humber
Original Article

DOI: 10.1007/s11557-017-1277-1

Cite this article as:
Luangsa-ard, J.J., Mongkolsamrit, S., Thanakitpipattana, D. et al. Mycol Progress (2017) 16: 369. doi:10.1007/s11557-017-1277-1

Abstract

In several surveys in the tropical forests in Thailand, specimens that looked morphologically similar to Metarhizium martiale and Cordyceps variegata, as well as other Metarhizium species were collected and cultured in vitro. A combined phylogeny of several genes including the small (18S) and large (28S) subunits of the ribosomal DNA, elongation factor 1-α (TEF), RNA polymerase II subunits 1 and 2 (RPB1, RPB2) genes has shown these to be new taxa in the Clavicipitaceae. Nigelia is described as a new genus closely related to Metarhizium, to the scale insect pathogens Aschersonia (Hypocrella), Samuelsia and Moelleriella, and to plant pathogens in Claviceps and Balansia, and other relatives. Nigelia comprises M. martiale and a new species Nigelia aurantiaca, which has been found infecting lepidopteran larvae and which produces pseudoimmersed, obliquely arranged, obpyriform perithecia with curved or bent ostioles and with whole (non-separating) cylindric ascospores. Metarhizium chaiyaphumense, M. kalasinense, M. prachinense, M. samlanense, and M. takense are described as new species of Metarhizium. Metarhizium martiale is transferred to Nigelia, and Paecilomyces reniformis is transferred to Metarhizium.

Keywords

Clavicipitaceae Taxonomy Cordyceps Hypocreales Metarhizium Phylogeny Entomogenous fungi 

Funding information

Funder NameGrant NumberFunding Note
CPMO
  • P15-51452

Copyright information

© German Mycological Society and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • J. Jennifer Luangsa-ard
    • 1
  • Suchada Mongkolsamrit
    • 1
  • Donnaya Thanakitpipattana
    • 1
  • Artit Khonsanit
    • 1
  • Kanoksri Tasanathai
    • 1
  • Wasana Noisripoom
    • 1
  • Richard A. Humber
    • 2
  1. 1.Microbe Interaction and Ecology Laboratory (BMIE), BIOTEC, National Science and Technology Development Agency (NSTDA)Khlong LuangThailand
  2. 2.USDA, ARS Biological Integrated Pest Management Research Unit, Robert W. Holley Center for Agriculture and HealthIthacaUSA

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