Mycological Progress

, Volume 12, Issue 4, pp 755–761 | Cite as

Ophiocordyceps sessilis sp. nov., a new species of Ophiocordyceps on Camponotus ants in Japan

  • Yoshitaka Kaitsu
  • Kiminori ShimizuEmail author
  • Eiji Tanaka
  • Satoshi Shimano
  • Shigeru Uchiyama
  • Chihiro Tanaka
  • Noriko Kinjo
Original Article


Ophiocordyceps sessilis, a new species of Ophiocordycipitaceae, Hypocreales, was found on Camponotus obscuripes ants, where the ants were primarily infected by another close relative, O. pulvinata. Morphological observation clearly indicated that O. sessilis and O. pulvinata are distinct species. Ophiocordyceps sessilis exhibited superficial development of perithecia and ascospore disarticulation into part-spores, not known in O. pulvinata. Nucleotide sequence data suggested that O. sessilis belongs in Ophiocordyceps, Ophiocordycipitaceae. Molecular data also indicated that O. sessilis is a close relative of O. cuboidea, O. prolifica, O. paracuboidea, and O. ryogamiensis, which are all known to produce part-spores. Since O. sessilis is always associated with ants infected by O. pulvinata, O. sessilis may be a hyperparasite of O. pulvinata.


Camponotus ant Hyperparasite Hypocreales Ophiocordycipitaceae Taxonomy 



We are grateful to the members of the Japanese Society for Vegetable Wasps and Plant Worms for collecting samples and for their fruitful discussions.


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Copyright information

© German Mycological Society and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Yoshitaka Kaitsu
    • 1
  • Kiminori Shimizu
    • 2
    Email author
  • Eiji Tanaka
    • 3
  • Satoshi Shimano
    • 4
  • Shigeru Uchiyama
    • 5
  • Chihiro Tanaka
    • 6
  • Noriko Kinjo
    • 7
  1. 1.Yanagawa-machi, DateJapan
  2. 2.Medical Mycology Research CenterChiba UniversityChuo-kuJapan
  3. 3.Ishikawa Prefectural UniversityNonoichiJapan
  4. 4.Environmental Education CenterMiyagi University of EducationAramaki 149, Aoba-kuJapan
  5. 5.RIKEN Research Cluster for Innovation Nakamura LaboratoryWakoJapan
  6. 6.Laboratory of Environmental Mycoscience, Graduate School of AgricultureKyoto UniversitySakyo-ku, KyotoJapan
  7. 7.College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan

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