Distribution of the Bathypelagic family Arietellidae (Copepoda: Calanoida) in the upper 200 m in the Indian Ocean

The calanoid copepods of the family Arietellidae were studiedfrom the International Indian Ocean Expedition collections.The family is represented by three genera and the members usuallyinhabit deeper layers of the ocean. In the Indian Ocean fivespecies of Arietellus were encountered, mostly from southernlatitudes. Paraugaptilus is reported for the first time fromthe Indian Ocean. Three species of Phyllopus were encounteredin the IIOE collections. The members of the genus were concentratedmostly in the equatorial belt. ^*National Institute for Oceanography, Dona Paula-403004, Goa,India.