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Gonad-infecting species of Philometra (Nematoda: Philometridae) from groupers Epinephelus spp. (Osteichthyes: Serranidae) in the Bay of Bengal, India

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Moravec F. , Manoharan J.

Acta Parasitologica

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2014

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tom 59

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nr 4

EN

Based on light and scanning electron microscopical studies, two new and one specifically not identified gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) are described from the ovary of marine fishes of the genus Epinephelus Bloch (Serranidae, Perciformes) in the Bay of Bengal, off the eastern coast of India: P. indica sp. nov. (male and females) from the honeycomb grouper E. merra Bloch, P. tropica sp. nov. (males and females) from the duskytail grouper E. bleekeri (Vaillant) and Philometra sp. (only females) from the cloudy grouper E. erythrurus (Valenciennes). Philometra indica is mainly characterized by the length of spicules 192–195 μm and the gubernaculum 84 μm, the distal tip of the gubernaculum without a dorsal protuberance, and by the presence of five pairs of caudal papillae. Philometra tropica is mainly characterized by the spicules conspicuously ventrally distended at their posterior halves, the distal tip of the gubernaculum with a dorsal protuberance, and the presence of three pairs of caudal papillae.

2

Some philometrid nematodes [Philometridae], including four new species of Philometra, from marine fishes off New Caledonia

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Moravec F. , Justine J.-L.

Acta Parasitologica

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2008

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tom 53

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nr 4

EN

Examinations of marine fishes off New Caledonia, South Pacific, carried out in 2003–2006, yielded some nematodes of the genus Philometra Costa, 1845, including the following three new species: P. cyanopodi sp. nov. (males and subgravid females) and P. lethrini sp. nov. (males and subgravid females) from the gonads of Epinephelus cyanopodus (Richardson) (Serranidae) and Lethrinus genivittatus Valenciennes (Lethrinidae), respectively, and P. lagocephali sp. nov. (gravid female) from the abdominal cavity of Lagocephalus sceleratus (Gmelin) (Tetraodontidae). Another congeneric species P. fasciati sp. nov. from the gonads of Epinephelus fasciatus (Forsskål) (Serranidae), originally reported as P. lateolabracis (Yamaguti, 1935), has been established with reference to the description of males and a mature female published by Moravec and Justine (2005). The new species are characterized mainly by the length of spicules and the length and structure of the gubernaculum, structure of the male caudal end (except for P. lagocephali), body size, location in the host and by the types of hosts. In addition, Philometra sp. (subgravid females) from the gonads of Lutjanus vitta (Quoy et Gaimard) (Lutjanidae) and Philometra cf. ocularis Moravec et al., 2002 (gravid female) from the oculo-orbit of Epinephelus areolatus (Forsskål) were found, the latter representing a new host record.

FR

L’examen de poissons marins de Nouvelle-Calédonie, Pacifique Sud, pratiqué en 2003–2006, a permis de récolter des nématodes du genre Philometra Costa, 1845, y compris les espèces nouvelles suivantes: P. cyanopodi sp. nov. (mâles et femelles subgravides) et P. lethrini sp. nov. (mâles et femelles subgravides) respectivement des gonades de Epinephelus cyanopodus (Richardson) (Serranidae) et Lethrinus genivittatus Valenciennes (Lethrinidae), et P. lagocephali sp. nov. (femelle gravide) de la cavité abdominale de Lagocephalus sceleratus (Gmelin) (Tetraodontidae). Une autre espèce congénérique P. fasciati sp. nov., des gonades de Epinephelus fasciatus (Forsskål) (Serranidae), originellement rapportée comme P. lateolabracis (Yamaguti, 1935), a été établie par référence à la description des mâles et d’une femelle mûre publiée par Moravec et Justine (2005). Les nouvelles espèces sont caractérisées principalement par la longueurs du spicule, la structure du gubernaculum, la structure de l’extrémité caudale du mâle (sauf pour P. lagocephali), la taille du corps, la position chez l’hôte et le type d’hôte. De plus, Philometra sp. (femelles subgravides) des gonades de Lutjanus vitta (Quoy et Gaimard) (Lutjanidae) et Philometra cf. ocularis Moravec et al., 2002 (femelle gravide) de l’œil et de l’orbite de Epinephelus areolatus (Forsskål) ont été trouvés, le dernier représentant un nouvel hôte.

3

Two species of Philometra [Nematoda, Philometridae] from serranid fishes off New Caledonia

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Moravec F. , Justine J. L.

Acta Parasitologica

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2005

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tom 50

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nr 4

EN

Two nematode species of the genus Philometra Costa, 1845, P. ocularis Moravec, Ogawa, Suzuki, Miyazaki et Donai, 2002 (gravid and nongravid females) and P. lateolabracis (Yamaguti, 1935) (males and nongravid females), were recorded from the ocular cavity and ovaries, respectively, of serranid fishes (Serranidae, Perciformes) off New Caledonia, South Pacific. The gravid female of P. ocularis was found to attain a body length up to 96 mm (as compared to 59 mm in the original description). The males of P. lateolabracis are described from fishes of the Pacific region for the first time; their spicules were found to be 147-213 µm in length, suggesting thus the synonymy of the recently re-established species P.jordanoi (López-Neyra, 1951) with P. lateolabracis. The findings of P. ocularis in Epinephelus coioides, E. cyanopodus, E. rivulatus and Variola louti, and P. lateolabracis in Epinephelus cyanopodus and E. fasciatus represent new host records. Both nematode species are reported for the first time from the region of New Caledonia, and P. ocularis from the South Pacific Ocean.

FR

Deux espèces de Nématodes du genre Philometra Costa, 1845, P. ocularis Moravec, Ogawa, Suzuki, Miyazaki et Donai, 2002 (femelles gravides et non gravides) et P. lateolabracis (Yamaguti, 1935) (mâles et femelles non gravides), ont été recensées des cavités oculaires et des ovaires, respectivement, de mérous (Perciformes, Serranidae) de Nouvelle-Calédonie, Pacifique Sud. La femelle gravide de P. ocularis atteint une longueur de 96 mm (à comparer aux 59 mm de la description originale). Les mâles de P. lateolabracis sont décrits de poissons du Pacifique pour la première fois; leurs spicules sont longs de 147-213 µm, ce qui suggère la synonymie de l'espèce récemment ré-établie P. jordanoi (López-Neyra, 1951) avec P. lateolabracis. P. ocularis chez Epinephelus coioides, E. cyanopodus, E. rivulatus et Variola louti, et P. lateolabracis chez Epinephelus cyanopodus et E.fasciatus fournissent des mentions de nouveaux hôtes. Les deux espèces de Nematodes sont mentionnées pour la première fois de Nouvelle-Calédonie, et P. ocularis pour la première fois dans l'Océan Pacifique Sud.

4

Redescription of three Philometra spp. [Nematoda, Philometridae] from the gonads of marine perciforms fishes of Iskenderun Bay [North-East Mediterranean], Turkey

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Moravec F. , Genc E.

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nr 1

EN

The following three species of Philometra Costa, 1845 were recorded from the gonads of marine perciform fishes off the northeastern coast of the Mediterranean Sea (Iskenderun Bay), Turkey: P. lateolabracis (Yamaguti, 1935) from Epinephelus marginatus (Lowe, 1834) and Mycteroperca rubra (Bloch, 1793) (both Serranidae), P. filiformis (Stossich, 1896) from Pagellus erythrinus (Linnaeus, 1758) (Sparidae), and P. saltatrix Ramachandran, 1973 from Pomatomus saltatrix (Linnaeus, 1766) (Pomatomidae). New data on the morphology of all these histozoic parasites were obtained with the use of light and scanning electron microscopy, which made it possible to redescribe these so far little-known species. Males of P. lateolabracis were redescribed in detail on the basis of specimens recovered from M. rubra; conspecific mature females from the same host were described for the first time. Philometra saltatrix was found for the first time since its original description and for the first time outside North America. The finding of P. lateolabracis in M. rubra represents a new host record. The possible importance of these pathogenic parasites for cultures of marine perciform fishes is stressed. A key to Philometra spp. parasitic in the gonads of marine fishes is provided.