Lamellodiscus euzetin. sp. (Monogenea: Diplectanidae), a parasite fromDentex canariensisandD. gibbosus(Teleostei: Sparidae) in the Atlantic Ocean and Mediterranean Sea

A Diamanka,B.S Toguebaye,A Pariselle,L Boudaya

doi:10.1051/parasite/2011182145

A Diamanka, B.S Toguebaye + Show 2 more

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https://doi.org/10.1051/parasite/2011182145

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Abstract

Lamellodiscus euzeti n. sp. (Monogenea: Diplectanidae) is described from the gills of two sparid fishes, Dentex canariensis (Steindachner) off Senegal and Ivory Coast and D. gibbosus (Rafinesque) off Senegal and Tunisia. The new species belongs to the “ignoratus” group, characterized by a lamellodisc with complete lamellae, a “lyre” shaped male copulatory organ type, and the “ignoratus” sensu stricto subgroup, characterized by a haptor with simple lateral dorsal bars. Lamellodiscus euzeti n. sp can be distinguished from all the congeneric species of the “ignoratus” subgroup by the presence of a prominent protuberance at the base of the curved part of the simple piece of the male copulatory organ (MCO), a large bulb at the base of the bifurcated piece of the MCO and the presence of 5-6 spines in the distal portion of the axial branch of the bifurcated piece of the MCO. Specificity and biogeography of Lamellodiscus species from sparid fishes are discussed.

Highlights

Lamellodiscus Johnston & Tiegs, 1922 (Monogenea: Diplectanidae) is currently composed of 56 described species that have been mainly studied in sparids
Twenty seven (27) specimens of Dentex canariensis and 48 of Dentex gibbosus were collected from Soumbedioune and Ouakam fish markets, near Dakar in Senegal, and four D. gibbosus from Sfax fish market, in Tunisia
The globular mass we observed in the vaginal chamber of L. euzeti is regularly present in different species of Lamellodiscus belonging to the “ignoratus” subgroup (Kritsky et al, 2000; Neifar et al, 2004; Amine et al, 2006; Diamanka et al, 2011)

Summary

Introduction

Lamellodiscus Johnston & Tiegs, 1922 (Monogenea: Diplectanidae) is currently composed of 56 described species (see Euzet & Oliver, 1967; Kritsky et al, 2000; Amine & Euzet, 2005; Amine et al, 2006, 2007; Neifar, 2008; Boudaya et al, 2009; Justine & Briand, 2010; Diamanka et al, 2011) that have been mainly studied in sparids. During our survey on the diversity and specificity of diplectanid (Monogenea) parasites of Atlantic and Mediterranean Sparidae (see Diamanka et al, 2011); we have collected from the

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