A recent examination of newly obtained specimens of philometrid nematodes (Philometridae) parasitising carangid and serranid fishes off New Caledonia, South Pacific, revealed the presence of several nematodes of the genus Philometra Costa, 1845, including three new species: P. austropacifica n. sp. (males and females) from the ovary of Alepes vari (Carangidae), P. piscaria n. sp. (males) from the ovary of Epinephelus coioides (Serranidae), and P. selaris n. sp. (males) probably from the abdominal cavity (found in washings) of Selar crumenophthalmus (Carangidae). The new species are characterised mainly by the length and structure of the spicules and gubernaculum, body size, their location in the host and the type of host. Philometra austropacifica n. sp. is the first known nominal gonad-infecting species of Philometra parasitising a carangid fish. In addition, the gravid female of P. fasciati Moravec & Justine, 2008 from the ovary of Epinephelus fasciatus (Serranidae) is described for the first time. Carangid host fish were identified by both morphology and DNA barcoding.

Une étude récente de spécimens nouvellement obtenus de nématodes Philometridae parasitant des poissons Carangidae et Serranidae de Nouvelle-Calédonie, dans le Pacifique Sud, a révélé la présence de plusieurs nématodes du genre Philometra Costa, 1845, dont trois nouvelles espèces : P. austropacifica n. sp. (mâles et femelles) de l’ovaire de Alepes vari (Carangidae), P. piscaria n. sp. (mâles) de l’ovaire d’Epinephelus coioides (Serranidae), et P. selaris n. sp. (mâles) probablement de la cavité abdominale (dans des lavages) de Selar crumenophthalmus (Carangidae). Les nouvelles espèces sont principalement caractérisées par la longueur et la structure des spicules et du gubernaculum, la taille du corps, par leur localisation dans l’hôte et par le type d’hôte. Philometra austropacifica n. sp. est la première espèce nominale connue de Philometra parasitant les gonades d’un Carangidae. En outre, la femelle gravide de P. fasciati Moravec et Justine, 2008 est décrite pour la première fois à partir de l’ovaire d’Epinephelus fasciatus (Serranidae). Les poissons hôtes Carangidae ont été identifiés à la fois par la morphologie et des codes-barres ADN.

• MeSH
• Dracunculoidea classification   growth & development   isolation & purification   MeSH
• Species Specificity MeSH
• Helminthiasis parasitology   MeSH
• Spirurida Infections parasitology   veterinary   MeSH
• Larva MeSH
• Molecular Sequence Data MeSH
• Fish Diseases parasitology   MeSH
• Intestinal Diseases parasitology   veterinary   MeSH
• Ovary parasitology   MeSH
• Intestinal Diseases, Parasitic MeSH
• Perciformes genetics   parasitology   MeSH
• Sex Characteristics MeSH
• Fishes genetics   parasitology   MeSH
• Base Sequence MeSH
• Sequence Homology, Nucleic Acid MeSH
• Sequence Alignment MeSH
• Animals MeSH
• Check Tag
• Male MeSH
• Female MeSH
• Animals MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Comparative Study MeSH
• Geographicals
• New Caledonia MeSH
• Pacific Ocean MeSH

Based on light and scanning electron microscopical studies, two new gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) are described from marine perciform fishes in the northern Gulf of Mexico: P. hyporthodi n. sp. from the ovary of the yellowedge grouper Hyporthodus flavolimbatus (Poey) (Serranidae) and P. lopholatili n. sp. from the ovary of the great northern tilefish Lopholatilus chamaeleonticeps Goode & Bean (Malacanthidae). Philometra hyporthodi is mainly characterised by the body length of both the males (3.62-4.07 mm) and gravid female (105 mm), the length of the spicules (135-138 μm) and the presence of dorsal transverse lamella-like structures on the distal portion of the gubernaculum. Philometra lopholatili is distinguished by the presence of a distinct dorsal protuberance consisting of two dorsolateral lamellated parts separated from each other by a smooth median field, an uninterrupted mound on the male caudal extremity, the length of the spicules (165-189 μm) and the body length of the males (2.19-2.34 mm) and gravid female (280 mm). Philometra lopholatili is the first representative of the genus and the second philometrid species reported from fishes of the family Malacanthidae.

• MeSH
• Dracunculoidea classification   ultrastructure   MeSH
• Species Specificity MeSH
• Gonads parasitology   MeSH
• Spirurida Infections parasitology   MeSH
• Microscopy, Electron, Scanning MeSH
• Fish Diseases parasitology   MeSH
• Perciformes 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
• Research Support, U.S. Gov't, Non-P.H.S. MeSH
• Geographicals
• Gulf of Mexico MeSH

A new nematode species, Philometra terapontis n. sp. (Philometridae), is described from male and female specimens found in the ovary of the jarbua terapon Terapon jarbua (Forsskål) (Terapontidae, Perciformes) from the Bay of Bengal off the eastern coast of India. Based on light and scanning electron microscopical examination, the new species differs from most other gonad-infecting Philometra spp. in the length of the spicules (105-114 μm), a gubernaculum with dorsal, lamella-like structures and a distinct protuberance on its distal end, and a U-shaped, dorsally uninterrupted caudal mound in the male. From a few congeneric, gonad-infecting species with unknown males, it can be distinguished by morphological and biometrical features found in gravid females (i.e. length of body, length of first-stage larvae or oesophagus, and caudal structure), by the host type (fish family) and by the geographical distribution. Philometra terapontis is the first philometrid species reported from a fish belonging to the family Terapontidae. Philometra sawara Quiazon, Yoshinaga & Ogawa, 2008 is considered a junior synonym of P. scomberomori (Yamaguti, 1935). A key to gonad-infecting species of Philometra parasitising marine and brackish-water fishes is provided.

• MeSH
• Dracunculoidea anatomy & histology   classification   isolation & purification   MeSH
• Esophagus ultrastructure   MeSH
• Gonads parasitology   ultrastructure   MeSH
• Larva anatomy & histology   MeSH
• Microscopy, Electron, Scanning MeSH
• Seawater MeSH
• Perciformes parasitology   MeSH
• Uterus 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
• India MeSH