A checklist, based on bibliographical records and original data from an extensive survey, is presented for the metazoan parasites of Galaxias maculatus (Jenyns, 1842) in Argentinean Patagonia The checklist includes 33 metazoan parasite entries: 5 myxozoans, 12 digeneans, 2 monogeneans, 3 cestodes, 2 acanthocephalans, 7 nematodes, 1 copepod, and 1 bivalve Gyrodactylus sp, Pomphorhynchus patagonicus Ortubay, Ubeda, Semenas and Kennedy, 1991, and Hysterothylacium patagonense Moravec, Urawa and Coria, 1997 are reported for the first time from G maculatus in South America Although this checklist enlarges the knowledge of G maculatus parasites, a large portion of Patagonia remains unexplored, and many of its lakes and rivers have never been surveyed for parasites, especially in the southern part of the region

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Presencia de protozoos parásitos en peces autóctonos de Patagonia Argentina

Metazoan Parasites of Galaxias maculatus (Osmeriformes: Galaxiidae) from Argentinean Patagonia

Myxidium biliare sp. n., a new myxosporean species parasitizing the gall bladder of Galaxias maculatus (Jenyns), in Patagonia, is described. Its coelozoic plasmodia were floating free in the bile. Spores are fusiform 13.7 ± 0.9 µm long and 6.9 ± 0.6 µm wide, with rounded ends in frontal view and slightly pointed ends in sutural view; shell with ridges and sinuous sutural line. Both maximum prevalence and maximum percentage of immature plasmodia occurred in summer. In winter the prevalence and the percentage of immature plasmodia fell to their lowest values. Prevalence was independent of host sex but increased with host length. Prevalence in 15 Patagonian Andean lakes (situated from 39°25'S to 41°30'S) ranged between 4.2% and 70%. Four species of Myxobolus Butschli, 1882 have been recorded from Galaxias maculatus (Jenyns) throughout its distribution range. In New Zealand, Hine (1976) described Myxobolus iucundus Hine, 1976 parasitizing muscles. In Tierra del Fuego, Szidat (1953) described M. magellanicus Szidat, 1953 in gills and M. galaxii Szidat, 1953 in muscles and organs of the abdominal cavity. In Falkland Islands Kalavati et al. (2000) described M. bartoni Kalavati, Brickle et MacKenzie, 2000 in the trunk musculature. Viozzi (1996) recorded the presence of spores of an unnamed species of Myxidium Butschli, 1882 in the gall bladder of G. maculatus in a Patagonian Andean lake. The aim of this study is to describe this new species of Myxidium, to provide information about its distribution range in north-western Patagonia and to describe the variation in its prevalence in relation to season and host sex and length from a Patagonian oligotrophic lake.

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Myxidium biliare sp. n. (Myxozoa) from gall bladder of Galaxias maculatus (Osmeriformes: Galaxiidae) in Patagonia (Argentina).

The monotypic Philureter n. gen. (Ancyrocephalinae; Dactylogyridae) is proposed to accommodate Philureter trigoniopsis n. sp. with the following features: presence of a cuplike ventral haptor armed with 14 hooks and 2 anchor/bar complexes; dorsal pair of anchors poorly defined and variable in shape, 1 frequently absent; tandem, intercecal gonads, testis bilaterally lobulated. Philureter trigoniopsis n. sp. is described from the ureters and urinary bladder of Galaxias maculatus (Jenyns, 1842) (Osmeriformes) in Patagonian Andean lakes, Argentina.

Philureter trigoniopsis, a new genus and species (Dactylogyridae, Ancyrocephalinae) from the ureters and urinary bladder of Galaxias maculatus (Osmeriformes: Galaxiidae) in Patagonia (Argentina).

Fil: Marcotegui, Paula Soledad. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - La Plata. Centro de Estudios Parasitologicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitologicos y de Vectores; Argentina

Geometric morphometric on a new species of Trichodinidae. A tool to discriminate trichodinid species combined with traditional morphology and molecular analysis.

Brachygalaxias bullocki (Regan, 1908) is a fish species endemic to Chile, and its distribution is restricted from Concepcion to ChiloeIsland. A survey conducted during January 2007, involving 26 fish from the Maullo´n River in Southern Chile, shows that infracommunities richness ranged from 0 to 5 with a mean species richness of 2.3 (SD ¼ 1.3). Nine species of parasites were recorded, and 8 constitute new records of parasites for B. bullocki: Ichthyophthirius sp., Trichodina sp., Epistylididae, Myx- obolus sp., Myxidium sp., Tylodelphys sp., Stephanoprora uruguayense, and Diplodon chilensis.

http://www.doctoradoenacuicultura.cl/doc/Mancilla%20et%20al,%20Comp%20Parasitol%202008.pdf

Presencia de protozoos parásitos en peces autóctonos de Patagonia Argentina

Citations

Metazoan Parasites of Galaxias maculatus (Osmeriformes: Galaxiidae) from Argentinean Patagonia

Myxidium biliare sp. n. (Myxozoa) from gall bladder of Galaxias maculatus (Osmeriformes: Galaxiidae) in Patagonia (Argentina).

Philureter trigoniopsis, a new genus and species (Dactylogyridae, Ancyrocephalinae) from the ureters and urinary bladder of Galaxias maculatus (Osmeriformes: Galaxiidae) in Patagonia (Argentina).

Geometric morphometric on a new species of Trichodinidae. A tool to discriminate trichodinid species combined with traditional morphology and molecular analysis.

Parasites of the Red Jollytail, Brachygalaxias bullocki (Osmeriformes: Galaxiidae), from the Maullín River, Patagonia, Chile