Two New Species of Zygonemertes (Nemertea : Enopla : Monostilifera) from Hokkaido, Japan

• Kajihara Hiroshi

  Division of Biological Sciences, Graduate School of Science, Hokkaido University:(Present address)Laboratory of Intellectual Fundamentals for Environmental Studies, National Institute for Environmental Studies

抄録

Two new species of the marine monostiliferous hoplonemertean genus Zygonemertes (Nemertea : Enopla) are fully described and illustrated from specimens collected in Hokkaido, northern Japan. Zygonemertes shintai sp. nov. is characterised by a posteriorly lobed central stylet basis, ten proboscis nerves, and anterior pouches of the intestinal caecum that do not reach the ganglionic lobes of the brain. Zygonemertes jamsteci sp. nov. is distinguished from the most similar species, Z. virescens (Verrill, 1879), by having a proboscis as long as the body and a mixed type of pre-cerebral septum. All stages of oogenesis are present simultaneously in mature females of Z. jamsteci. Their oocytes seem to originate from the ganglionic cells of the lateral nerves. All six sectioned specimens of Z. jamsteci were infected by large numbers of unidentified acephaline eugregarines.

収録刊行物

• Species Diversity

  Species Diversity 7 (2), 121-143, 2002

  日本動物分類学会

キーワード

• Nemertea
• Enopla
• Hoplonemertea
• Zygonemertes
• new species
• acephaline Eugregarina

詳細情報

• CRID: 1390282679435098496
• NII論文ID: 110002344107
• NII書誌ID: AA11114903
• DOI: 10.12782/specdiv.7.121
• ISSN: 21897301
• ISSN: 13421670
• NDL書誌ID: 6181249
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6181249
• Web Site: https://www.jstage.jst.go.jp/article/specdiv/7/2/7_KJ00003893333/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可