A new pedunculate barnacle (Cirripedia : Heteralepadidae) from the Northwest Atlantic

A species of Heteralepas has been discovered attached to a gorgonian coral from 500 meters of depth off Nova Scotia (similar to422degrees N). A brief review of the previously described Heteralepas species is presented. Of the 29 previously described species (including 2 in synonymy), the new species is more similar to some from the Indo-West Pacific than to any of the 8 previously known species from the Atlantic. While the new species can be distinguished from Atlantic but not some Pacific species by some characters, it can be distinguished from all species of the genus by small but marked differences in the configuration of the apertural region of the capitulum. Therefore it is proposed as a new species, Heteralepas cantelli, the most northern known member of the family.