A new species of Rugogaster (Aspidobothrea: Rugogastridae) parasite of the elephant fish, Callorhinchus callorhynchi [callorhyncus] (Callorhinchidae), from the estuary of the La Plata River, coasts of Uruguay and Argentina. Revista Brasileira de Parasitologia Veterinaria, 4(1), fevereiro 1995: 1-7. 2 [Zoological Record Volume 134]