Cornutohaptor nigrescensi n. sp. (Diplectanidae) is described from the gills of the black snook, Centropomus nigrescens (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.
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June 2006
ECTOPARASITOLOGY|
June 01 2006
A NEW DIPLECTANID (MONOGENEA) GENUS AND SPECIES FROM THE GILLS OF THE BLACK SNOOK, CENTROPOMUS NIGRESCENS (PERCIFORMES: CENTROPOMIDAE) OF THE PACIFIC COAST OF MEXICO
Edgar F. Mendoza-Franco;
Edgar F. Mendoza-Franco
Laboratory of Parasitology, Centro de Investigación y de Estudios Avanzados (CINVESTAV, Unidad Mérida), Carretera Antigua a Progreso Km. 6, Apartado Postal 73 “Cordemex”, C.P. 97310 Mérida, Yucatán, Mexico. [email protected]
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Juan Violante-González;
Juan Violante-González
Laboratory of Parasitology, Centro de Investigación y de Estudios Avanzados (CINVESTAV, Unidad Mérida), Carretera Antigua a Progreso Km. 6, Apartado Postal 73 “Cordemex”, C.P. 97310 Mérida, Yucatán, Mexico. [email protected]
* Laboratory of Ecology, Unidad Académica de Ecología Marina, Universidad Autónoma de Guerrero, Gran Vía Tropical No. 20, Fraccionamiento las Playas. C.P. 39390, Acapulco, Guerrero, Mexico
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Víctor M. Vidal-Martínez
Víctor M. Vidal-Martínez
Laboratory of Parasitology, Centro de Investigación y de Estudios Avanzados (CINVESTAV, Unidad Mérida), Carretera Antigua a Progreso Km. 6, Apartado Postal 73 “Cordemex”, C.P. 97310 Mérida, Yucatán, Mexico. [email protected]
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J Parasitol (2006) 92 (3): 481–485.
Citation
Edgar F. Mendoza-Franco, Juan Violante-González, Víctor M. Vidal-Martínez; A NEW DIPLECTANID (MONOGENEA) GENUS AND SPECIES FROM THE GILLS OF THE BLACK SNOOK, CENTROPOMUS NIGRESCENS (PERCIFORMES: CENTROPOMIDAE) OF THE PACIFIC COAST OF MEXICO. J Parasitol 1 June 2006; 92 (3): 481–485. doi: https://doi.org/10.1645/GE-3538.1
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