Helminthological examinations of three species of sharks, Galeocerdo cuvier, Triaenodon obesus (both Carcharhinidae, Carcharhiniformes) and Stegostoma fasciatum (Stegostomatidae, Orectolobiformes) from New Caledonian waters, carried out during 2003-2005, revealed the presence of three species of adult anisakid nematodes referable to Terranova Leiper et Atkinson, 1914. However, this genus can no longer be considered valid, because its type species has been designated a species inquirenda. Therefore, the present nematodes are assigned to two newly established genera, Euterranova n. gen. [type species E. dentiduplicata n. sp.] and Neoterranova n. gen. [type species N. scoliodontis (Baylis, 1931) n. comb.], based mainly on different labial structures. Euterranova dentiduplicata n. sp. from the stomach of S. fasciatum is mainly characterized by the presence of lips with two rows of denticles. Innominate specimens of Euterranova (a female and a third-stage larva) were collected from the digestive tract of T. obesus. Specimens of N. scoliodontis were recorded from G. cuvier. The two named species are described based on light and scanning electron microscopical examinations. Neoterranova scoliodontis has previously been recorded in New Caledonian waters from the same host species. Species previously attributed to Terranova are transferred to Euterranova (5 species), Neoterranova (4 species) or considered species inquirendae (10 species). Since Pseudoterranova Mozgovoy, 1950 was found to be a nomen nudum according to the International Code of Zoological Nomenclature (ICZN), the available name of this genus is Pseudoterranova Mozgovoy, 1953. A key to Porrocaecum-like nematode genera (Porrocaecum, Pseudoterranova, Pulchrascaris, Euterranova, and Neoterranova) is provided.

TITLE: Érection d’Euterranova n. gen. et Neoterranova n. gen. (Nematoda, Anisakidae), avec la description d’E. dentiduplicata n. sp. et de nouveaux signalements de deux autres nématodes Anisakidae de requins au large de la Nouvelle-Calédonie. ABSTRACT: L’examen helminthologique de trois espèces de requins dans les eaux néo-calédoniennes, Galeocerdo cuvier, Triaenodon obesus (tous deux Carcharhinidae, Carcharhiniformes) et Stegostoma fasciatum (Stegostomatidae, Orectolobiformes), réalisé en 2003–2005, a révélé la présence de trois espèces de nématodes Anisakidae adultes qu’on pourrait référer à Terranova Leiper et Atkinson, 1914. Cependant, ce genre ne peut plus être considéré comme valide, car son espèce type a été désignée species inquirenda. Par conséquent, les nématodes décrits ici sont attribués à deux genres nouvellement établis, Euterranova n. gen. [espèce-type E. dentiduplicata n. sp.] et Neoterranova n. gen. [espèce type N. scoliodontis (Baylis, 1931) n. comb.], principalement sur la base de différentes structures labiales. Euterranova dentiduplicata n. sp., de l’estomac de S. fasciatum, se caractérise principalement par la présence de lèvres à deux rangées de denticules. Des spécimens non nommés d’Euterranova (une femelle et une larve de troisième stade) ont été collectés dans le tube digestif de T. obesus. Des spécimens de N. scoliodontis ont été trouvés chez G. cuvier. Les deux espèces nommées sont décrites sur la base d’examens au microscope photonique et électronique à balayage. Neoterranova scoliodontis a déjà été signalé dans les eaux néo-calédoniennes chez la même espèce hôte. Les espèces précédemment attribuées à Terranova sont transférées à Euterranova (5 espèces), Neoterranova (4 espèces) ou considérées comme species inquirendae (10 espèces). Puisque Pseudoterranova Mozgovoy, 1950 s’est avéré être un nomen nudum selon le Code international de nomenclature zoologique (ICZN), le nom disponible de ce genre est Pseudoterranova Mozgovoy, 1953. Une clé des genres de nématodes de type Porrocaecum (Porrocaecum, Pseudoterranova, Pulchrascaris, Euterranova et Neoterranova) est fournie.

Institut Systématique Évolution Biodiversité Muséum National d'Histoire Naturelle CNRS Sorbonne Université EPHE Université des Antilles rue Cuvier CP 51 75005 Paris France

Institute of Parasitology Biology Centre of the Czech Academy of Sciences Branišovská 31 370 05 České Budějovice Czech Republic

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