Genus with a single species endemic to vents. Specimens have been rarely collected in washings of tubes of Tevnia and Riftia or sulphide crusts. The setae of the foot and the strange tubular processes on the back of the shell may be involved in some kind of symbiosis with chemosynthetic organisms (?). Sexes separate, females larger than males. Larval development lecithotrophic with planktonic dispersal stage.