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The biology of Atrispinum labracis n. comb. (Monogenea) on the gills of the bass, Dicentrarchus labrax
Winch, J. (1983). The biology of Atrispinum labracis n. comb. (Monogenea) on the gills of the bass, Dicentrarchus labrax. J. Mar. Biol. Ass. U.K. 63(4): 915-927
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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Keywords
    Ectoparasites; Gills; Organism morphology; Parasites; Taxonomy; Dicentrarchus labrax (Linnaeus, 1758) [WoRMS]; Monogenea [WoRMS]; Percidae Rafinesque, 1815 [WoRMS]; Pisces [WoRMS]; Marine

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  • Winch, J.

Abstract
    Atrispinum labracis (Van Beneden & Hesse) n.comb. syn. Microcotyle labracis Van Beneden & Hesse, 1863, parasitizes the bass Dicentrarchus labrax but almost only in the open sea; the very low prevalence of parasites on juvenile estuarine hosts was not due to intolerance of lower salinities in this habitat. The intensity of infection on open-sea bass was rarely more than 2 per fish but the strict localization of the habitat to the outer hemibranch of the ventral end of the first gill arch is thought to enhance the mating opportunities. The parasite attaches itself asymmetrically to the gill by a permanent morphological inclination of the body with respect to the haptor which is itself symmetrically aligned on a single primary lamella. Substantial differences between the copulatory apparatus of A. labracis and that of Microcotyle donavini Van Beneden & Hesse, 1863, the type of Microcotyle, have made necessary the transfer of the parasite of Dicentrarchus labrax to Atrispinum Maillard & Noisy, 1979 and a consequent amendment to the diagnosis of the subfamily Atriasterinae Maillard & Noisy, 1979.

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