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https://hdl.handle.net/20.500.14094/90004840
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2024-04-20
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90004840 (fulltext)
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メタデータID
90004840
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open access
出版タイプ
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タイトル
The changing use of the ovipositor in host shifts by ichneumonid ectoparasitoids of spiders (Hymenoptera, Ichneumonidae, Pimplinae)
著者
Takasuka, Keizo ; Fritzen, Niclas R. ; Tanaka, Yoshihiro ; Matsumoto, Rikio ; Maeto, Kaoru ; Shaw, Mark R.
著者名
Takasuka, Keizo
著者名
Fritzen, Niclas R.
著者名
Tanaka, Yoshihiro
著者名
Matsumoto, Rikio
著者ID
A1046
研究者ID
1000080346238
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=8b48aa3c6c1af65e520e17560c007669
著者名
Maeto, Kaoru
前藤, 薫
マエトウ, カオル
所属機関名
農学研究科
著者名
Shaw, Mark R.
収録物名
Parasite
巻(号)
25
ページ
17-17
出版者
EDP Sciences
刊行日
2018-03-28
公開日
2018-05-08
抄録
Accurate egg placement into or onto a living host is an essential ability for many parasitoids, and changes in associated phenotypes, such as ovipositor morphology and behaviour, correlate with significant host shifts. Here, we report that in the ichneumonid group of koinobiont spider-ectoparasitoids ("polysphinctines"), several putatively ancestral taxa (clade I here), parasitic on ground-dwelling RTA-spiders (a group characterised by retrolateral tibial apophysis on male palpal tibiae), lay their eggs in a specific way. They tightly bend their metasoma above the spider's cephalothorax, touching the carapace with the dorsal side of the ovipositor apically ("dorsal-press"). The egg slips out from the middle part of the ventral side of the ovipositor and moves towards its apex with the parted lower valves acting as rails. Deposition occurs as the parasitoid draws the ovipositor backwards from under the egg. Oviposition upon the tough carapace of the cephalothorax, presumably less palatable than the abdomen, is conserved in these taxa, and presumed adaptive through avoiding physical damage to the developing parasitoid. This specific way of oviposition is reversed in the putatively derived clade of polysphinctines (clade II here) parasitic on Araneoidea spiders with aerial webs, which is already known. They bend their metasoma along the spider's abdomen, grasping the abdomen with their fore/mid legs, pressing the ventral tip of the metasoma and the lower valves of the ovipositor against the abdomen ("ventral-press"). The egg is expelled through an expansion of the lower valves, which is developed only in this clade and evident in most species, onto the softer and presumably more nutritious abdomen.
キーワード
Polysphinctine
Oviposition
Ventral-press
Dorsal-press
RTA-clade
Araneoidea
カテゴリ
農学研究科
学術雑誌論文
権利
© K. Takasuka et al., published by EDP Sciences, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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資源タイプ
journal article
言語
English (英語)
ISSN
1252-607X
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eISSN
1776-1042
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関連情報
DOI
https://doi.org/10.1051/parasite/2018011
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