Acta Parasitologica

, Volume 54, Issue 4, pp 341–349 | Cite as

Two cystidicolids (Nematoda, Cystidicolidae) from marine fishes off New Caledonia

Article

Abstract

Two nematode species of the family Cystidicolidae were collected from the digestive tract of marine fishes off New Caledonia, South Pacific: Ascarophis adioryx Machida, 1981 from the stomach of the speckled squirrelfish Sargocentron spiniferum and the sabre squirrelfish Neoniphon sammara (new host record) (both Holocentridae, Beryciformes), and a Spinitectus sp. female, morphologically similar to S. beaveri Overstreet, 1970, from the roundjaw bonefish Albula glossodonta (Albulidae, Albuliformes). Based on light and scanning electron microscopy examinations, A. adioryx is redescribed and a new subgenus Dentiascarophis subgen. nov., characterized by the presence of one dorsal and one ventral median protrusions in the mouth, is established to accommodate it; a key to subgenera of Ascarophis is provided. Ascarophis holocentri Parukhin, 1984 is considered a junior synonym of A. adioryx. The cephalic structure of Spinitectus sp. and S. beaveri is very different from those in other congeners and, therefore, a new subgenus Paraspinitectus subgen. nov., characterized by highly reduced pseudolabia, is erected to accommodate these species. The hemiurid digenean Lecithochirium cirrhiti (Manter et Pritchard, 1960) Yamaguti,1970 was found in the stomach of three species of squirrelfishes. Findings of A. (D.) adioryx, Spinitectus (P.) sp. and L. cirrhiti in New Caledonian waters represent new geographical records of these parasites.

Keywords

Parasitic nematode Ascarophis Spinitectus trematode Lecithochirium marine fish Albula Neoniphon Sargocentron New Caledonia South Pacific 

Résumé

Deux espèces de Nématodes Cystidicolidae ont été récoltées du tube digestif de poissons marins de Nouvelle-Calédonie, Pacifique Sud: Ascarophis adioryx Machida, 1981 de l’estomac des poissons-écureuils (Holocentridae, Beryciformes) Sargocentron spiniferum et Neoniphon sammara (nouvel hôte), et une femelle de Spinitectus sp., similaire morphologiquement à S. beaveri Overstreet, 1970, du poisson-banane Albula glossodonta (Albulidae, Albuliformes). A. adioryx est redécrit à partir d’observations en microscopie photonique et électronique à balayage, et un nouveau genre Dentiascarophis subgen. nov., caractérisé par la présence d’une protubérance dorsale et d’une protubérance ventrale dans la bouche, est établi pour l’accueillir. Une clé des sous-genres d’Ascarophis est proposée. Ascarophis holocentri Parukhin, 1984 est considéré synonyme d’A. adioryx. La structure céphalique de Spinitectus sp. et de S. beaveri est très différente de celle des autres congénères et un nouveau sous-genre Paraspinitectus subgen. nov., caractérisé par des pseudolèvres très réduites, est établi pour accueillir ces espèces. Le digène Hemiuridae Lecithochirium cirrhiti (Manter et Pritchard, 1960) Yamaguti, 1970 a aussi été trouvé dans l’estomac de trois espèces de poissons-écureuils. La Nouvelle-Calédonie est une nouvelle mention géographique pour A. (D.) adioryx, Spinitectus (P.) sp. et L. cirrhiti.

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Copyright information

© © Versita Warsaw and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Institute of Parasitology, Biology CentreAcademy of Sciences of the Czech RepublicČeské BudějoviceCzech Republic
  2. 2.Équipe Biogéographie Marine Tropicale, Unité Systématique, Adaptation, Évolution (UPMC, CNRS, MNHN, IRD)Institut de Recherche pour le DéveloppementNouméa CedexNew Caledonia

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