A new species of the genus Stephanoprora Odhner, 1902 (Digenea: Echinostomatidae)from Argentina

JORGE ALEJANDRO ETCHEGOIN; MARTORELLI, SERGIO ROBERTO

Acta Parasitologica

Año: 1997 vol. 42 p. 74 - 76

Stephanoprora podicipei sp. n. parasite of great grebe Podiceps major Boddaert, 1785 (A ves, Podicipedidae) from Mar Chiquita coastal lagoon (Buenos Aires, Argentina) is described and illustrated. The new species presents common features with S. conciliata Dietz, 1909; S. manei Holcman-Spector et Olagüe, 1986; S. dogieli Ho1cman-Spector et Olagüe, 1989 and S. uruguayense Holcman-Spector et 01agüe, 1989. S. podicipei sp. n. can be clearly distinguished from these species, principally, by the smaller size of its body, peristomic disk, testes, ovary and by its shorter oesophagus and uterus. S. podicipei also differs from S. argentiniensis Sutton et a1., 1982, the other species of this genus parasitizing Podiceps major in Argentina, in the number of spines of the peristomic disk (22 vs. 20), in its sma11er body, peristomic disk and testes; in its larger acetabulum and eggs, in the shape of the testes and in its vitellaria extending to the middle of the anterior testis.