Echiurus The Echiura, or spoon worms, are a small group of marine animals. Once treated as a separate phylum, they are now considered to belong to Annelida. Annelids typically have their …

螠虫目 （学名： Echiuroidea），亦作 螠目，舊作 螠虫动物門 或 螠虫动物綱 （Echiura），是 动物界 环节动物门 的一类海生底栖动物，主要生活在浅海的泥沙中、岩石缝中以及 珊瑚礁 或 …

螠虫动物门（学名Echiura）是动物界的一个小门，是一类生活中海洋中的底栖动物，主要生活在浅海的泥沙中、岩石缝中以及珊瑚礁或贝壳中穴居。 已知的种类约有150种。 螠虫动物与星虫 …

A comprehensive molecular phylogeny of spoon worms (Echiura, Annelida): implications for morphological evolution, the origin of dwarf males, and habitat shifts.

2021年2月1日 · Echiura is small group of unsegmented marine worms that are sometimes abundant in the benthos of all areas of the World Ocean. The study of echiuran morphology …

螠虫动物 ( Echiura)与星虫动物栖息环境相似,但主要以温暖海域沿岸分布为主,少数种类在极地水域也有发现。 体长从数毫米至40~50cm不等。 螠虫动物大约有140种,身体蠕虫状,不分节,吻不 …

Phy­lum Echiura is com­prised of over 230 species of un­seg­mented, sausage-shaped, coelo­mate worms, tra­di­tion­ally placed in three or­ders: Echi­uroinea, by far the largest order, with two …

2014年1月1日 · Unusual structures in the echiurans are anal sacs that function as excretory organs like nephridia but empty into the anus. These and the presence of setae and a …

2020年3月1日 · The echiuroidea (spoon worms), once known as the phylum Echiura, are small group of polychaete worms in the phylum Annelida. They occupy marine, or occasionally …

The 230 speciose (Zhang, 2011) Echiura are exclusively marine, cylindrical, soft-bodied coelomate spoon worms. Their body is divisible into a long (1 m long in Bonellia, 1.4 m long in …