来自马达加斯加的一种新的异常的真涡虫属（扁形动物门，三肠目，真涡虫科）物种。

A new and aberrant species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from Madagascar.

作者信息

Stocchino Giacinta Angela, Sluys Ronald, Manconi Renata

机构信息

Dipartimento di Scienze della Natura e del Territorio, Via Muroni 25, University of Sassari, I-07100, Italy.

Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands.

出版信息

Zookeys. 2014 Jul 15(425):71-88. doi: 10.3897/zookeys.425.7811. eCollection 2014.

DOI:10.3897/zookeys.425.7811

PMID:25147450

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4137307/

Abstract

In this paper we report a new species of Dugesia of the family Dugesiidae from Madagascar, representing the fourth species of freshwater planarian known from this global biodiversity hotspot. In some respects the new species is aberrant, when compared with its congeners, being characterized by a head with smoothly rounded auricles, a peculiar course of the oviducts, including the presence of a common posterior extension, and by the asymmetrical openings of the vasa deferentia at about halfway along the seminal vesicle. Further, it is characterized by a ventral course of the ejaculatory duct with a terminal opening, very long spermiducal vesicles and unstalked cocoons. Its diploid chromosome complement with 18 chromosomes represents an uncommon feature among fissiparous species of Dugesia.

摘要

在本文中，我们报道了一种来自马达加斯加的杜氏科真涡虫属新物种，这是已知来自这个全球生物多样性热点地区的第四种淡水涡虫。与同属其他物种相比，新物种在某些方面表现异常，其特征包括头部耳叶圆润光滑、输卵管走行奇特（包括有一个共同的后延部分）、输精管在精囊大约中部位置不对称开口。此外，其射精管走行于腹面且有一个终端开口、精囊泡非常长以及茧无柄。它具有18条染色体的二倍体染色体组型，这在真涡虫的裂体生殖物种中是一个不常见的特征。