First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species

Cardiac portion of foregut in Mysidetes illigi from ice cave of Bernard Island, Antarctica. Adult female BL 18.1 mm A foregut in dorsal view, food removed from right half, lower-case labels indicate dorsolateral infoldings (di), lateralia (la), mid-gut (mg) and storage space (sp) B spine group from dorsolateral infoldings C spinose lobe of posterior part of lateralia D, E spines from median portions of lateralia.