In this paper we report a new species of Dugesiaof 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.

A new and aberrant species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from Madagascar / Manconi, Renata; Stocchino, Giacinta Angela; Sluys, Ronald. - In: ZOOKEYS. - ISSN 1313-2970. - 425:(2014), pp. 71-88. [10.3897/zookeys.425.7811]

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

Manconi, Renata;Stocchino, Giacinta Angela;
2014

Abstract

In this paper we report a new species of Dugesiaof 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.
A new and aberrant species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from Madagascar / Manconi, Renata; Stocchino, Giacinta Angela; Sluys, Ronald. - In: ZOOKEYS. - ISSN 1313-2970. - 425:(2014), pp. 71-88. [10.3897/zookeys.425.7811]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/80019
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