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- W2339658514 abstract "Cornutohaptor nigrescensi n. sp. (Diplectanidae) is described from the gills of the black snook, Centropomus ni- grescens (Perciformes: Centropomidae) from the Pacific coast of Mexico. Cornutohaptor n. gen. is proposed for this new species and is characterized by possessing 2 intestinal ceca terminating blindly; a germarium looping right intestinal cecum; bilobed testis; 2 seminal vesicles; 7 pairs of hooks, each with protruding thumb; a grooved ventral bar and coiled male copulatory organ (MCO); an accessory piece comprising a baglike structure with an appendage; dorsal bars associated parallelly to body midline; and no adhesive accessory organs on the haptor. Cornutohaptor differs from all confamilial genera by including species with anchors with straight and deep root longest, hook pair 1 reduced in size, MCO with counterclockwise rings, and by the morphology of the accessory piece. Cornutohaptor nigrescensi most closely resembles species of Murraytrema Price, 1937, Lobotrema Tripathi, 1937, and Murraytrematoides Yamaguti, 1958, because of the absence of squamodiscs or lamellodiscs on the haptor and tegumental scales on the posterior portion of the body. Cornutohaptor differs from these genera in the position and number of haptoral bars (2 bars in Lobotrema spp., dorsal bars transversally associated in Murraytrema and Murraytrematoides spp.) and in having a coiled MCO (copulatory organ is a comparatively straight, poorly sclerotized tube in Murraytrematoides spp.). This is the first diplectanid described from a centropomid along the Pacific coast of Mexico. Species of Diplectanidae Monticelli, 1903 (Polyonchoinea: Dactylogyridea) are predominantly gill parasites of freshwater and marine perciforms of Centropomidae, Megalopidae, Nem- ipteridae, Percichthiydae, Polynemidae, Sciaenidae, Serranidae, Sillaginidae, Sparidae, Sphyraenidae, Teraponidae, and Toxo- didae (Beverley-Burton and Suriano, 1981; Kritsky and Thatch- er, 1984; Kritsky and Beverley Burton, 1986; Dyer, 1995; Vi- dal-Martinez et al., 1997; Vidal-Martinez and Mendoza-Franco, 1998; Kritsky et al., 2000, 2001; Mendoza-Franco et al., 2004). In this article, a new genus and species of the Diplectanidae is described from the gills of the black snook, Centropomus ni- grescens Gunther, 1864, Centropomidae, from the Pacific coast of Mexico, and data on its prevalence and intensity of infection for each sampling site are provided. The diplectanid specimens described herein were collected as part of an ongoing study on metazoan parasite communities associated with parasite ex- change among marine, estuarine, and freshwater fishes from the Pacific coast, in the state of Guerrero, Mexico." @default.
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- W2339658514 title "A NEW DIPLECTANID (MONOGENEA) GENUS AND SPECIES FROM THE GILLS OF THE BLACK SNOOK, CENTROPOMUS NIGRESCENS (PERCIFORMES: CENTROPOMIDAE) OF" @default.
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