Recent examinations of spirurid nematodes (Spirurida) from deep-sea or coral reef marine fishes off New Caledonia, collected in the years 2006-2009, revealed the presence of the following five species: Ichthyofilaroides novaecaledoniensis (Moravec et Justine, 2009) n. gen., n. comb. (transferred from Ichthyofilaria Yamaguti, 1935) (females) (Guyanemidae) from the deep-sea fish Hoplichthys citrinus (Hoplichthyidae, Scorpaeniformes), Philometra sp. (male fourth-stage larva and mature female) (Philometridae) from Epinephelus maculatus (Serranidae, Perciformes), Ascarophis (Dentiascarophis) adioryx Machida, 1981 (female) (Cystidicolidae) from Sargocentron spiniferum (Holocentridae, Beryciformes), Ascarophis (Ascarophis) nasonis Machida, 1981 (males and females) from Naso lituratus and N. unicornis (Acanthuridae, Perciformes), and Ascarophisnema tridentatum Moravec et Justine, 2010 (female) from Gymnocranius grandoculis (Lethrinidae, Perciformes). Two species, I. novaecaledoniensis and A. nasonis, are redescribed based on light microscopical (LM) and scanning electron microscopical (SEM) examinations, the latter used in these species for the first time. Morphological data on the specimen of A. tridentatum from the new host species are provided. Philometra sp. (from E. maculatus) most probably represents a new gonad-infecting species of this genus. The newly established genus Ichthyofilaroides n. gen. is characterized mainly by the presence of a small buccal capsule and by the number and distribution of cephalic papillae in the female; it is the sixth genus in the Guyanemidae.

TITLE: Nouvelles mentions de nématodes spirurides (Nematoda, Spirurida, Guyanemidae, Philometridae & Cystidicolidae) de poissons marins de la Nouvelle-Calédonie, avec redescriptions de deux espèces et érection d’Ichthyofilaroides n. gen. ABSTRACT: L’étude récente de nématodes Spirurida de poissons marins de mer profonde ou des récifs coralliens au large de la Nouvelle-Calédonie, collectés dans les années 2006-2009, a révélé la présence des cinq espèces suivantes : Ichthyofilaroides novaecaledoniensis (Moravec et Justine, 2009) n. gen., n. comb. (transféré depuis Ichthyofilaria Yamaguti, 1935) (femelles) (Guyanemidae) du poisson de profondeur Hoplichthys citrinus (Hoplichthyidae, Scorpaeniformes), Philometra sp. (larve mâle de quatrième stade et femelle mûre) (Philometridae) d’Epinephelus maculatus (Serranidae, Perciformes), Ascarophis (Dentiascarophis) adioryx Machida, 1981 (femelle) (Cystidicolidae) de Sargocentron spiniferum (Holocentridae, Beryciformes), Ascarophis (Ascarophis) nasonis Machida, 1981 (mâles et femelles) de Naso lituratus et N. unicornis (Acanthuridae, Perciformes), et Ascarophisnema tridentatum Moravec et Justine, 2010 (femelle) de Gymnocranius grandoculis (Lethrinidae, Perciformes). Deux espèces, I. novaecaledoniensis et A. nasonis, sont redécrites sur la base de la microscopie optique et de la microscopie électronique à balayage, cette dernière étant utilisée pour la première fois chez ces espèces. Des données morphologiques sur le spécimen d’A. tridentatum de la nouvelle espèce hôte sont fournies. Philometra sp. (d’E. maculatus) représente très probablement une nouvelle espèce infectant les gonades de ce genre. Le genre nouvellement établi Ichthyofilaroides n. gen. se caractérise principalement par la présence d’une petite capsule buccale et par le nombre et la répartition des papilles céphaliques chez la femelle. C’est le sixième genre des Guyanemidae.

• Keywords
• Acanthuridae, Holocentridae, Hoplichthyidae, Serranidae, South Pacific, Spirurida,
• MeSH
• Dracunculoidea classification   ultrastructure   MeSH
• Species Specificity MeSH
• Host Specificity MeSH
• Spirurida Infections veterinary   MeSH
• Coral Reefs MeSH
• Larva anatomy & histology   ultrastructure   MeSH
• Microscopy, Electron, Scanning MeSH
• Fish Diseases parasitology   MeSH
• Oceans and Seas MeSH
• Fishes parasitology   MeSH
• Spirurida anatomy & histology   classification   isolation & purification   ultrastructure   MeSH
• Animals MeSH
• Check Tag
• Male MeSH
• Female MeSH
• Animals MeSH
• Publication type
• Journal Article MeSH
• Geographicals
• New Caledonia MeSH
• Oceans and Seas MeSH

Based on light and scanning electron microscopical studies, a new nematode parasite, Pseudodelphis eleginopsis n. sp. (Dracunculoidea: Guyanemidae), is described from tissues behind the gills of the Patagonian blennie Eleginops maclovinus (Cuvier) (Perciformes: Eleginopsidae) off the Atlantic coast (San Matías and San José Gulfs) of Patagonia, Argentina. The new species is mainly characterised by the length of the body (males 10-13 mm, larvigerous females 31-59 mm), the number (14) and arrangement of cephalic papillae, the absence of a buccal capsule, the muscular to glandular oesophagus length ratio (1:3-4) of larvigerous females, the length of the spicules (48-63 µm) and the number (7 pairs) and arrangement of the caudal papillae in the male. Pseudodelphis eleginopsis n. sp. is the first species of this genus described from a marine fish in the Atlantic Ocean and the first known dracunculoid parasitising the fish host belonging to the family Eleginopsidae. As revealed by the examination of very young females of the new species, the female genital tract of Pseudodelphis spp. is monodelphic. The genus Syngnathinema Moravec, Spangenberg & Frasca, 2001 is considered a junior synonym of Pseudodelphis Adamson & Roth, 1990 and, consequently, S. californiense and S. chitwoodi are transferred to Pseudodelphis as P. californiensis (Moravec, Spangenberg & Frasca, 2001) n. comb. and P. chitwoodi (Moravec & Kuchta, 2013) n. comb., respectively. Two dracunculoid species, Pseudodelphis limnicola Brugni & Viozzi, 2006 and the previously established Philonema percichthydis Moravec, Urawa & Coria, 1997, both described from the same freshwater host species, Percichthys trucha (Valenciennes), in the same region (Patagonia), are considered to be identical; therefore, the valid name of this species is Pseudodelphis percichthydis n. comb. and P. limnicola becomes its junior synonym. A key to the species of Pseudodelphis is provided.

• MeSH
• Dracunculoidea anatomy & histology   classification   MeSH
• Species Specificity MeSH
• Perciformes parasitology   MeSH
• Gills parasitology   MeSH
• Animals MeSH
• Check Tag
• Male MeSH
• Female MeSH
• Animals MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Geographicals
• Argentina MeSH