| Summary: | Two species of the antarctic hydroid genus Oswaldella Stechow, 1919, are considered. The first, described by Stepan\'yants (1979) as a subspecies, O. billardi shetlandica, has been raised to specific level and will henceforth be indicated as Oswaldella shetlandica Stepan\'yants, 1979. A second species is described as Oswaldella elongata spec. nov. Both species are differentiated against the remaining known species of Oswaldella; new records are added and the geographical distribution is discussed.\nResumen: Se considera la posici\xc3\xb3n sistem\xc3\xa1tica de dos especies del g\xc3\xa9nero Oswaldella Stechow, 1919.\nUna de ellas, descrita por Stepan\'yants (1979) como una subespecie de Oswaldella billardi Briggs, 1938, es elevada al nivel espec\xc3\xadfico y pasa a denominarse Oswaldella shetlandica Stepan\'yants, 1979. La segunda especie se describe como Oswaldella elongata spec. nov. Se remarcan las diferencias de estas dos especies con las restantes especies del g\xc3\xa9nero y se presentan los datos existentes sobre la autoecolog\xc3\xada de ambas especies.
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