Poliquetos bentónicos submareales de fondos blandos de la región de Aysén, Chile: Clados Amphinomida, Eunicida, Spionida, Sabellida y Scolecida (Annelida, Polychaeta)

we present results from a taxonomic study of subtidal benthic polychaetes belonging to the amphinomida, eunicida, spionida, sabellida and scolecida clades, obtained during the cimar-7 and cimar-8 fjords research cruises. we include morphological observations and illustrations, synonymy and the geographical distribution for each species. samples were obtained in the aysén region (43o45？s-46o28？s), on the southeastern pacific coast of chile, from silt-clay bottoms using an agassiz trawl between 20 and 444 m depth. during the two cruises we collected 79 specimens from the eunicida clade (corresponding to six species, grouped into six genera and five families); two specimens of the species pareurythoe chilensis (kinberg) and chaetopterus cf. variopedatus (renier) from the amphinomida and spionida clades, respectively; 13 specimens from the sabellida clade (four species, grouped into four genera and three families); and 187 specimens from the scolecida clade (three species grouped into two genera and one family). we collected a total of three species of maldanidae (20% of the total sampled abundance), two species of lumbrineridae and serpulidae (13.3%), and one species each of amphinomidae, dorvilleidae, eunicidae, oenidae, onuphidae, chaetopteridae, sabellariidae and sabellidae (6.7%), respectively. during the cimar-7 cruise we collected a total of 178 polychaete specimens, noteably maldane sarsi antarctica arwidsson which represented 73% of total abundance. during the cimar-8 cruise we collected 105 polychaetes; maldane chilensis hartmann-schr？der represented 50.5% of total sampled species abundance. our findings increase the total number of benthic polychaete species currently recorded for the aysén region to 91 species