the Southern Ocean

• Main Authors: Carlos San Vicente, Françoise Monniot
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Key words; new genus; Heteromysinae; Symbiosis; Ascidians; Macquarie Island; Southern Ocean
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.25; http://www.mapress.com/zootaxa/2014/f/z03780p346f.pdf

A new mysid species representing a new genus is described based on specimens collected in the 1968 cruise of the U.S. Navy Ship Eltanin from the Macquarie Island region (Southern Ocean). The new mysid, Corellamysis eltanina, is char-acterized by the globular eyes lacking definite eyestalks, the seven and eighth thoracic endopods specialized as gnatho-pods forming a strong subchela, and by the armature and shape of the uropod endopod and telson. Corellamysis eltanina lives only in the branchial sacs of the ascidian Corella brewinae suggesting an obligate endocommensal symbiotic asso-ciation. Therefore, this is the first known report of a mysid living symbiotically with a benthic tunicate, as well as the first report of a mysid symbiosis from the Southern Ocean. The distribution and habitats of known symbiont mysids are re-viewed. An update of identification key to world genera and subgenera of Heteromysinae is suggested.