Studies on the larval stages of Euphausiacea from the Indian seas 2. Description of post-naupliar stages of Stylocheiron carinatum G. O. Sars

Abstract

The complete post-naupliar developmental stages of Stylocheiron carittatum G. O. Sars identified from the zooplankton samples collected during cruises of R.V. VAR UNA from the continental shelf waters of the south-west coast of India have been described. There are three calyptopis and six furcilia stages. The larvae at the stage of five terminal spines have been found to jump to a stage with one spine alone, thus skipping a stage with three terminal spines, which is a typical stage in the evelopment of other euphausiids. A comparative study has been made with the larvae described by two other rkers from the Pacific and the Atlantic oceans.