A new genus and species of caridean shrimp (Crustacea: Decapoda: Alvinocarididae) from North Atlantic hydrothermal vents

Iorania concordia gen. nov., sp. nov. (Crustacea: Decapoda) belonging to the family Alvinocarididae is described from the Mid Atlantic Ridge, TAG location (26°09'N 44°50'W). The taxonomic position in the family and distinguishing characters (rostrum, armature of telson, form of first maxilliped) of the new genus are presented, and a possible evolutionary feeding hierarchy within the family is suggested. A key is given to the genera of the Alvinocarididae.