Dorvilleids belonging to Ophryotrocha Claparède & Mecznikow, 1869 are known from deep-sea hydrothermal vents in the Pacific, Atlantic, Indian and Southern Oceans. However, how they colonized and diversified in these ecosystems has not been assessed

A new species of Dorvilleidae, Ophryotrocha mediterranea, commensal in the branchial chambers of the deep-water crab Geryon longipes, is fully described and illustrated. It is characterized by the presence of seven pairs of denticulate maxillary plates

Four species of Ophryotrocha (Annelida, Dorvilleidae) from deep-sea reducing habitats (methane seeps on the Koryak slope and hydrothermal vents of the submarine Piip Volcano) were collected in the western part of the Bering Sea, NW Pacific. Descriptions