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Pelagic polychaetes collected at 29 oceanographic stations in the southern channels of Chile between Boca del Guafo and Elefantes Channel (spring 1998, summer 1999) were analyzed. Seven species of pelagic polychaetes were identified: Tomopterisplanktonis Apstein, T. septentrionalis Steenstrup, Pelagobia longicirrata Greeff, Lopadorhynchus krohnii (Claparede), Maupasia caeca Viguier, Typhloscolex muelleri Busch, and Phalacrophorus pictus Greeff. Seven species were collected in spring and five in summer. All the identified species are cosmopolitan and were recorded for the first time in this sector of southern Chile's interior waters. Maupasia caeca, Lopadorhynchus krohnii, and Typhloscolex muelleri are recorded for the first time in the southeastern Pacific Ocean and the southern distribution limit of Phalacrophorus pictus was extended to the coast of Chile.Se analizaron los poliquetos pelágicos colectados en 29 estaciones oceanógraficas en canales australes chilenos localizados entre la boca del Guafo y el estero Elefantes, en primavera de 1998 y verano de 1999. Se identificaron siete especies de poliquetos pelágicos: Tomopteris planktonis Apstein, T. septentrionalis Steenstrup, Pelagobia longicirrata Greeff, Lopadorhynchus krohnii (Claparede), Maupasia caeca Viguier, Typhloscolex muelleri Busch y Phalacrophorus pictus Greeff. Siete especies se colectaron en primavera y cinco en verano. Todas las especies identificadas son cosmopolitas y se registran por primera vez en este sector de aguas interiores del sur de Chile. Maupasia caeca, Lopadorhynchus krohnii y Typhloscolex muelleri se registran por primera vez en aguas del Pacífico suroriental y Phalacrophorus pictus extiende su límite de distribución sur hasta la costa de Chile.

Pelagic polychaetes collected at 29 oceanographic stations in the southern channels of Chile between Boca del Guafo and Elefantes Channel (spring 1998, summer 1999) were analyzed. Seven species of pelagic polychaetes were identified: Tomopteris planktonis Apstein, T. septentrionalis Steenstrup, Pelagobia longicirrata Greeff, Lopadorhynchus krohnii (Claparéde), Maupasia caeca Viguier, Typhloscolex muelleri Busch, and Phalacrophorus pictus Greeff. Seven species were collected in spring and five in summer. All the identified species are cosmopolitan and were recorded for the first time in this sector of southern Chile's interior waters. Maupasia caeca, Lopadorhynchus krohnii, and Typhloscolex muelleri are recorded for the first time in the southeastern Pacific Ocean and the southern distribution limit of Phalacrophorus pictus was extended to the coast of Chile. [ABSTRACT FROM AUTHOR]