2015年7月
Allopodocotyle enkaimushi n. sp (Digenea: Opecoelidae: Plagioporinae) from the Short-Tail Grenadier, Nezumia proxima (Gadiformes: Macrouridae), from Sagami Bay, Japan, with a Key to Species of This Genus and a Checklist of Parasites Reported from This Host
COMPARATIVE PARASITOLOGY
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- ,
- 巻
- 82
- 号
- 2
- 開始ページ
- 219
- 終了ページ
- 230
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- HELMINTHOLOGICAL SOC WASHINGTON
Allopodocotyle enkaimushi n. sp. (Opecoelidae: Plagioporinae) is described from the pyloric ceca and intestine of the short-tail grenadier, Nezumia proxima (Smith and Radcliff, 1912) (Gadiformes, Macrouridae), collected at depths of 681-1,061 m off Jogashima Island, Sagami Bay, Japan. The new species is placed in Group C and is distinguished from its closest congener, Allopodocotyle margolisi Gibson, 1995, by possessing a terminal rather than a subterminal oral sucker; an unspecialized, inconspicuously elevated ventral sucker rather than being embedded in a well-developed ventral eminence that forms an anterior and lateral fold but with no distinct, muscular fold around the entire ventral sucker; a cirrus pouch that is entirely anterior to the ventral sucker rather than extending posteriorly to about the midlevel of it; and a sessile genital pore that is not situated on an eminence and surrounded by a muscular thickening of the body wall that appears to form a sphincter, as is the case in A. margolisi. In addition, A. enkaimushi n. sp. parasitizes a member of the grenadier genus Nezumia Jordan, 1904, from the west Pacific Ocean (Japan) rather than a species of the grenadier genus Coryphaenoides Gunnerus, 1765, from the North Atlantic Ocean. The combination of tandem testes, an entirely pre-acetabular cirrus pouch, and a pre-bifurcal (esophageal level) genital pore distinguishes A. enkaimushi n. sp. from all members of Group C recognized herein as well as from the 3 accepted species of Allopodocotyle Pritchard, 1966, already known from Japanese waters. A checklist of parasites reported from N. proxima is provided. We also furnish a key to the species in Groups A-C of Allopodocotyle, offer insights into the host familial diversity of shallow-water representatives in this genus, and hypothesize life histories for the 2 deep-water representatives in this genus.
- リンク情報
- ID情報
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- ISSN : 1525-2647
- eISSN : 1938-2952
- Web of Science ID : WOS:000361560600007