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Endemic freshwater planarians of Sardinia: Redescription ofDugesia hepta(Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 2005 Italy English Publisher:Informa UK LimitedJournal:Journal of Natural History, volume 39, pages 1,947-1,960 (issn: 0022-2933, eissn: 1464-5262,

Authors: Stocchino, G. A.; Corso, G.; Manconi, R.; Casu, S.; Pala, M.;

doi: 10.1080/00222930500060025

handle: 11388/86823

Endemic freshwater planarians of Sardinia: Redescription ofDugesia hepta(Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus

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Abstract

The endemic freshwater planarian Dugesia hepta from Sardinia was described mainly by karyology and karyotype analysis and by geographic distribution. The present paper reports on the detailed morphological study of the copulatory apparatus and highlights the fact that the exclusive diagnostic characters of D. hepta are the shape of the penis papilla, the course and opening of the ejaculatory duct and the openings of the shell glands. A neotype is designated on the basis of a detailed description, and the geographic range of the species is better defined. The two phylogenetically important traits represented by the course and opening of the ejaculatory duct show an unknown condition in the genus Dugesia, diverging from the typical one displayed by the other 69 species. A comparative analysis of morphological traits of the 20 Mediterranean species of the genus Dugesia was made.

Country

Italy

Related Organizations

Università degli studi di Salerno
Italy
University of Sassari
Italy

Keywords

Tracheophyta, Magnoliopsida, Asterales, Biodiversity, Asteraceae, Plantae, Taxonomy

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