Description of Odontozona addaia spec. nov. (Crustacea: Decapoda: Stenopodidae) from a marine cave in the island of Minorca, western Mediterranean

Odontozona addaia, a new species of stenopodid shrimp is described from a marine cave in the island of Minorca (Balearic Islands), being the first record of the genus for the western Mediterranean. One male and one ovigerous female were found during a systematic propspection of several Balearic caves during 1988. Sexual dimorphism is observed and described; the differences mainly concern a more developed third pereiopod in the male, and a distinct shape and armature of the pleonites and pleopods in both sexes. The distinction of this new taxon from the other known closely related species, O. minoica, is discussed.