How many Siphonaria species (Gastropoda: Euthyneura) live in southern South America?

• Main Authors: Güller, M., Zelaya, D.G., Ituarte, C.
• Format: Journal/Newspaper
• Language: unknown
• Subjects: coastal zone; geographical distribution; interspecific variation; molecular analysis; morphology; new species; nomenclature; shell; snail; type specimen; Antarctica; Argentina; Chilean Margin; Falkland Islands (Malvinas); Pacific Ocean; South Georgia; Uruguay; Animalia; Euthyneura (gastropods); Gastropoda; Antarc*
• Online Access: https://hdl.handle.net/20.500.12110/paper_02601230_v82_n1_p80_Guller

This contribution provides the first integrative revision of the Siphonaria species described and reported from southern South America, by combining information on shell morphology, distal portion of the genital system, radula, molecular data and living animal. More than 200 lots, from all along the Uruguayan, Argentinean and southern Chilean coasts, including the Malvinas (Falkland) Islands and South Georgia, were studied. Among the nine nominal species listed for this area, only the presence of Siphonaria lessonii Blainville, 1827 and S. lateralis Gould, 1846 could be confirmed. The intraspecific variability of these two species along their distributional ranges is examined. Siphonaria magellanica Philippi, 1855 and S. antarctica Gould, 1852 are regarded as probable synonyms of S. lessonii. The Magellanic records of S. tristensis are reassigned to S. lessonii and those of S. macgillivrayi to S. fuegiensis n. sp. The similarity of S. redimiculum Reeve, 1856, S. laeviuscula Sowerby, 1835 and S. lineolata Sowerby, 1835 to the three species confirmed in the studied area is discussed. The Chilean S. laevis Philippi, 1846 is considered a nomen dubium. All available types are figured and a lectotype is designated for S. redimiculum. © The Author 2015. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved. Fil:Güller, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zelaya, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.