Adrian Gutiérrez
Departamento de Biodiversidad y Biologia Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), C/ Jose Gutierrez Abascal 2, 28006 Madrid, Spain.
Isabelle Auby
Ifremer, LITTORAL, Quai Du Commandant Silhouette, 33120, Arcachon, France.
Benoit Gouillieux
Univ. Bordeaux, CNRS, Observatoire Aquitain des Sciences de l’Univers, UAR 2567 POREA, F-33615, Pessac, France.
Guillemine Daffe
Univ. Bordeaux, CNRS, Observatoire Aquitain des Sciences de l’Univers, UAR 2567 POREA, F-33615, Pessac, France.
Cecile Massé
Service Patrimoine Naturel (PATRINAT) OFB, CNRS, MNHN, CP41, 36 rue Geoffroy Saint-Hilaire 75005 Paris, France.
Elvire Antajan
Ifremer, LITTORAL, Quai Du Commandant Silhouette, 33120, Arcachon, France.
Carolina Noreña
Departamento de Biodiversidad y Biologia Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), C/ Jose Gutierrez Abascal 2, 28006 Madrid, Spain.
Communicated by Benny Kwok Kan Chan
A new species of polyclad flatworm, Idiostylochus tortuosus gen. nov., sp. nov. (Polycladida, Idioplanidae), from Arcachon Bay (France) is described. This description is based on a morphological analysis and a molecular analysis using partial sequences of the 28S and cytochrome Oxidase I (COI) genes. After the molecular analysis Idiostylochus gen. nov. appears to be the second genus of the Family Idioplanidae and
closely related to the family Latocestidae as well as the genera Leptostylochus and Mirostylochus. The molecular data revealed that the new species may belong to an Indonesian or Indo-Pacific family, closely related to genera with origins in South Pacific Ocean waters. This species was found feeding on the oysters and mussels of the Arcachon farms.
