ABSTRACT Members of several polychaete families inhabit rocky shores, including syllids, serpulids, eunicids, nereidids, and sabellids. The primary studies on consolidated substrates conducted in Sepetiba Bay (Rio de Janeiro, Brazil) date back to 2004, with multiple taxonomic studies having been carried out since then. In this study, we present an updated checklist on polychaetes from hard substrates in Sepetiba Bay, together with an identification key for the species. We also discuss the status and distribution of certain species along the Brazilian coast. Myrianida pachycera, Branchiomma bairdi, Branchiomma coheni, and Branchiomma conspersum represent new occurrences in Brazil. We extend the distribution of Proceraea anopla to Southeastern Brazil, and report 33 new records for Sepetiba Bay. We identify Halosydna glabra, Oxydromus obscurus, Oxydromus pugettensis, Marphysa sanguinea, Lysidice ninneta, Spirobranchus americanus, Polydora ciliata, Pseudonereis variegata, Nereis cf. oligohalina, and Schistomeringos rudolphi as requiring taxonomic revision, all of which have been recorded previously in Sepetiba Bay. However, the specimens we examine in this study differ from the original descriptions, indicating that a more comprehensive assessment of the respective species is needed along the Brazilian coast. shores syllids serpulids eunicids nereidids sabellids Rio Janeiro Brazil 2004 then coast pachycera bairdi coheni 3 glabra obscurus pugettensis sanguinea ninneta americanus ciliata variegata cf oligohalina revision However descriptions 200 20 2

Abstract Ophryotrocha is the most speciose genus within Dorvilleidae, with species occurring in a great variety of environments around the globe. In Brazil, records of Ophryotrocha are scarce and no specific identification is provided for any of the records. Herein we describe a new species of Dorvilleidae, Ophryotrocha zitae sp. nov. Adult and larval specimens were found in the axis of a fragment of the cold-water coral Lophelia pertusa, sampled off São Paulo’s coast, at a depth of 245 m. Both forms are described and illustrated. This new species resembles O. puerilis, O. adherens and O. eutrophila, but can be distinguished based on differences in its mandible and on chaetae shape and arrangement.

Abstract Species of Serpulidae are common on benthic and biofouling communities, occurring attached on both natural and artificial substrates. In this paper, Serpulids were collected from intertidal to subtidal areas, on rocky shore and suspended artificial plates in port areas. Herein we report three new records of serpulid species to the coast of Rio de Janeiro, Brazil. We also discuss the misidentification of Spirobranchus tetraceros, which was previously reported to the north of Rio de Janeiro.