New cystidicolid species (Nematoda) from Galaxias platei (Osmeriformes: Galaxiidae) in Patagonian freshwater environments

BRUGNI, NORMA; VIOZZI, GUSTAVO

JOURNAL OF PARASITOLOGY

American Society of Parasitologists

Lugar: Lawrence, Kansas; Año: 2008 vol. 94 p. 841 - 846

0022-3395

During a parasitological survey of Galaxias platei Steindachner, 1898 fromPatagonian Andean Lakes, a new species of Cystidicolidae was found in the stomach of fish.The new species was described using light and scanning electron microscopy; it hascharacteristics of Ascarophis and is distinguishable from other species by a combination of thefollowing features: well developed pseudolabia, with T-shaped inner extentions, bifurcatedeirids, small ratio GE/ME, small left spicule, small ratio LS/RS, and larvigerous eggs withthick and fine filaments in both poles. Intraspecific variation in the morphology of larvigerouseggs was studied. This is the first species of Ascarophis described from freshwater fishes.