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Investigaciones marinas

On-line version ISSN 0717-7178

Abstract

ROZBACZYLO, Nicolás; MORENO, Rodrigo A  and  DIAZ-DIAZ, Oscar. Benthic subtidal polychaetes on soft bottoms of the Aysén region of Chile: Clade Phyllodocida (Annelida, Polychaeta). Investig. mar. [online]. 2005, vol.33, n.1, pp.69-89. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71782005000100005.

Results from a taxonomic analysis of benthic polychaetes of the clade Phyllodocida, obtained during the Cimar-7 and Cimar-8 Fjords research cruises are presented. Synonymy, distribution, morphological remarks, and illustrations for each species are included. The samples were obtained in the region of Aysén, on the southern coast of Chile, from silt-clay bottoms using an Agassiz trawl between 20 and 444 m depth. A total of 119 specimens of polychaetes from the clade Phyllodocida were collected. These specimens consisted of 15 species, grouped into 12 genera and 6 families. One incomplete specimen of Syllidae recovered was included only for the taxonomic record. The samples analyzed included a total of seven species of Polynoidae (46.7% of total abundance of all samples), four species of Nereididae (26.7% abundance) and one each of the Aphroditidae, Sigalionidae, Glyceridae and Nephtyidae (6.7% abundance). During the Cimar-7 cruise a total of 67 specimens of polychaetes were collected, including the sigalionid Leanira quatrefagesi (Kinberg) which accounted for 29.9% of the total abundance. During the Cimar-8 cruise, 52 specimens of polychaetes were collected, in particular Leanira quatrefagesi accounting for 42.3% of total abundance, followed by the polynoid Harmothoe spinosa (Kinberg) with 40.4% abundance. Our findings increased the number of benthic polychaetes recorded for the Aysén region to 66 species

Keywords : cold temperate waters; Magellanic Province; SE Pacific.

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