19 páginas, 9 figuras.Three species of scale-worms inhabiting chaetopterid tubes have been found during routine studies of
benthic communities. Anotochaetonoe michelbhaudi gen. and sp. nov. occurred in the East Atlantic off
Congo in association with Spiochaetopterus sp. and Phyllochaetopterus sp. It has a relatively short body
(fewer than 50 segments); elytra in posterior part of the body arranged on chaetigers 23, 26, 29, 32,
34, 37, 40, 43, 46, present to posterior end; achaetous notopodia; neuropodia long, with longer
subtriangular prechaetal lobes and shorter postchaetal lobes rounded distally; upper neurochaetae
unidentate and lower bidentate; globular ciliated papillae present between ventral cirri and ventral
basis of neuropodia. Lepidasthenia brunnea occurred in the Mediterranean Sea off the French coast
both free-living and in association with Phyllochaetopterus sp. Ophthalmonoe pettiboneae was found in
Vietnam (South China Sea) in association with Chaetopterus sp. This is the second finding of the
species. The characteristics of the associations between chaetopterid genera and symbiotic
polychaetes are discussed.This study was supported by a mobility grant of the Spanish Ministry of Education and
Science (ref. no. SAB2003-0268), by the Federal Program ‘‘World Ocean. The studies of
World Ocean nature, the dynamic of ecosystems’’ of the Russian Ministry of Sciences and
Technologies and by the Russian Foundation for Basic Research (grant 05-04-48350). The
study has also been partly financed by a research contract between the CEAB (CSIC) and
CREOCEAN (France).Peer reviewe
