Integrative delineation of species of Mediterranean freshwater planarians (Platyhelminthes: Tricladida: Dugesiidae) Author Sluys, Ronald Author Solà, Eduard Author Gritzalis, Konstantinos Author Vila-Farré, Miquel Author Mateos, Eduardo Author Riutort, Marta text Zoological Journal of the Linnean Society 2013 2013-10-29 169 3 523 547 http://dx.doi.org/10.1111/zoj.12077 journal article 10.1111/zoj.12077 0024-4082 5290979 GENUS RECURVA SLUYS GEN. NOV. Diagnosis: Dugesiidae with very slender body and rotund head. Asymmetrical penis papilla with oblique or almost vertical orientation, when non-extended. Ejaculatory duct with a distinctly subterminal opening at the anterior or antero-ventral side of the penis papilla and surrounded by a well-developed coat of circular muscle. Testes dorsal, distributed throughout the body length. Intrabulbar seminal vesicle surrounded by well-developed coat of interwoven muscle. Common oviduct, opening onto ventral, horizontal and broadened section of the bursal canal, which receives the openings of shell glands anteriorly to the oviducal opening. Bursal canal covered with a coat of circular muscle. Type species: Recurva postrema Sluys & Solà sp. nov. Etymology: The generic name is derived from the Latin adjective recurvus , bent backwards, and alludes to the situation that the ejaculatory duct curves backwards to such an extent that its opening is located at the antero-ventral side of the penis papilla. Gender: female.