Mycological Progress

, Volume 12, Issue 4, pp 755–761

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


  • Yoshitaka Kaitsu
    • Medical Mycology Research CenterChiba University
  • Eiji Tanaka
    • Ishikawa Prefectural University
  • Satoshi Shimano
    • Environmental Education CenterMiyagi University of Education
  • Shigeru Uchiyama
    • RIKEN Research Cluster for Innovation Nakamura Laboratory
  • Chihiro Tanaka
    • Laboratory of Environmental Mycoscience, Graduate School of AgricultureKyoto University
  • Noriko Kinjo
    • College of Liberal Arts and SciencesTokyo Medical and Dental University
Original Article

DOI: 10.1007/s11557-013-0911-9

Cite this article as:
Kaitsu, Y., Shimizu, K., Tanaka, E. et al. Mycol Progress (2013) 12: 755. doi:10.1007/s11557-013-0911-9


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

Copyright information

© German Mycological Society and Springer-Verlag Berlin Heidelberg 2013