| 翻訳と辞書 |
| Gordius (genus) ： ウィキペディア英語版 |
Gordius (genus)
''Gordius'' is a genus of worms in the phylum Nematomorpha, the horsehair worms. It was formerly treated as the only genus in the family Gordiidae, but the genus ''Acutogordius'' is now usually included there.〔Bleidorn, C., et al. (2002). (Systematic relationships of Nematomorpha based on molecular and morphological data. ) ''Invertebrate Biology'' 121(4), 357-64.〕 The genus is distributed worldwide except for Antarctica, where no Nematomorpha have been recorded.〔Schmidt-Rhaesa, A. (2002). (Are the genera of Nematomorpha monophyletic taxa? ) ''Zoologica Scripta'' 31(2), 185-200.〕
==Description==
The adult worm is a free-living animal. It is hairlike, very long and very thin. It commonly grows over a meter long,〔Capinera, J. L. (Horsehair Worms, Hairworms, Gordian Worms, Nematomorphs, ''Gordius'' spp. (Nematomorpha: Gordioidea). ) EENY-117. Entomology and Nematology. Florida Cooperative Extension Service. University of Florida IFAS. Published 1999, revised 2005.〕 with the record length held by a specimen of ''G. fulgur'' over two meters long,〔Schmidt-Rhaesa, A. and R. Ehrmann. (2001). (Horsehair worms (Nematomorpha) as parasites of praying mantids with a discussion of their life cycle. ) ''Zoologischer Anzeiger'' 240(2), 167-79.〕 and may be only about one millimeter wide. It is reddish brown to black. Besides a blunt anterior end and a slightly widened posterior end, it is featureless to the naked eye.〔 Microscopic features include a diagnostic character of the family, both ''Gordius'' and genus ''Acutogordius'', the postcloacal crescent of the male, a fold in the cuticle curving around the back side of the cloaca. At the front end of the body there is a white cap and a dark collar. At the posterior end there are tiny bristles, sometimes arranged in a row in front of the cloaca. Some species have a smooth body surface, and some may be slightly bumpy with flattened areoles. Most of these features are used in species identification, but are not very helpful,〔 and it is difficult to tell species apart, in general. A thorough taxonomy of the genus will require a scanning electron microscope.〔Schmidt-Rhaesa, A. (2010). (Considerations on the genus ''Gordius'' (Nematomorpha, horsehair worms), with the description of seven new species. ) ''Zootaxa'' 2533, 1-35.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Gordius (genus)」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|