Deladenus nitobei n. sp. (Tylenchomorpha: Allantonematidae) isolated from Sirex nitobei (Hymenoptera: Siricidae) from Aomori, Japan, a new member of the siricidicola superspecies

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  • Natsumi Kanzaki
    Forestry and Forest Products Research Institute (FFPRI), 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
  • Suguru E. Tanaka
    Forestry and Forest Products Research Institute (FFPRI), 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
  • Katrin Fitza
    Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
  • Hajime Kosaka
    Kyushu Research Center, FFPRI, 4-11-16 Kurokami, Chuo, Kumamoto, Kumamoto, 860-0862, Japan
  • Bernard Slippers
    Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
  • Koki Kimura
    Forestry and Forest Products Research Institute, Aomori Prefectural Industrial Technology Research Center, 46-56 Kominato-Shinmichi, Hiranai, Higashi-Tsugaru, Aomori 039-3321, Japan
  • Satoshi Tsuchiya
    Forestry and Forest Products Research Institute, Aomori Prefectural Industrial Technology Research Center, 46-56 Kominato-Shinmichi, Hiranai, Higashi-Tsugaru, Aomori 039-3321, Japan
  • Masanobu Tabata
    Tohoku Research Center, FFPRI, 92-25 Nabeyashiki, Shimo-kuriyagawa, Morioka, Iwate 020-0123, Japan

説明

<jats:p><jats:italic>Deladenus nitobei</jats:italic>n. sp., a parasite of a woodwasp species,<jats:italic>Sirex nitobei</jats:italic>, is described based on its typological characters and molecular profiles of part of the small subunit D2-D3 expansion segments of the large subunit and internal transcribed spacer region of the ribosomal RNA gene, as well as part of the mitochondrial cytochrome oxidase subunit I (mtCOI) gene. Adult host woodwasps emerging from dead Japanese red pine logs,<jats:italic>Pinus densiflora</jats:italic>, collected at Aomori, Japan, were dissected and examined for nematode association. The new species was isolated from the body cavity and reproductive system of<jats:italic>S. nitobei</jats:italic>as large parasitic females and small parasitic juveniles. The nematodes were cultured successfully on 1.0% malt extract agar medium, inoculated with<jats:italic>Sirex</jats:italic>-associated fungus,<jats:italic>Amylostereum</jats:italic><jats:italic>areolatum</jats:italic>. The mycophagous adult nematodes were characterised by the relative position of the excretory pore, located at 25 (19-28) and 25 (18-30)<jats:italic>μ</jats:italic>m anterior to the hemizonid in the male and female, respectively, and a broad female tail with a rounded distal end. Typologically, the new species forms a cryptic species complex with<jats:italic>D. siricidicola</jats:italic>and<jats:italic>D. canii</jats:italic>. In addition, the new species and<jats:italic>D. siricidicola</jats:italic>share the same host wasp, tree and fungal species in Japan. However, the cryptic species can be separated from each other based on the described morphological and molecular sequence differences in the mtCOI gene.</jats:p>

収録刊行物

  • Nematology

    Nematology 18 (10), 1199-1217, 2016

    Walter de Gruyter GmbH

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