Abstract

O. heptalineatus nov. is described from the Chilean sea lion Otaria flavescens. Distinct characteristics of the species are: presence of 7 longitudinal ridges on the ventral surface, cirrus armed with scales, testes and ovary deeply lobed and eggs circular with short polar filaments. This is the 1st report of Ogmogaster from South America and the 1st report of Otaria flavescens as a host for this genus.