| 翻訳と辞書 |
| Macrostomida ： ウィキペディア英語版 |
Macrostomida
The Macrostomida〔Meixner, J. 1924. Über das Ovarium von Microstomum lineare (Müll.) und die Abscheidungsfolge des Schalen- und Dottermaterials bei rhabdocoelen Turbellarien. Zool. Anz. 58:195-213.〕 are a taxon of small basal free-living flatworms (Turbellaria, Platyhelminthes), which inhabit freshwater, brackish, and marine environments. The taxon name was coined by Josef Meixner (1924).〔 There are currently about 260 named species in this taxon.〔Tyler, S., Schilling, S., Hooge, M., and Bush L. F. (comp.) (2006-2009) Turbellarian taxonomic database. Version 1.5 http://turbellaria.umaine.edu/turb2.php?action=1&code=2775〕
As is the case for many other taxa, the taxonomic rank of Macrostomida is not very clear.
== Description ==
Macrostomidans are small (~0.5 to 5 mm in length), and generally highly transparent microturbellarians, usually round in cross section, and with only the largest forms being dorsoventrally flattened. They are distinguished from related animals by the possession of a simple pharynx and intestine, and a single pair of lateral nerve cords, and by the absence of a statocyst.〔
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「Macrostomida」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.
|
|