A new species of Stenopus (Crustacea: Decapoda: Stenopodidae) from the Indo-West Pacific, with a redefinition of the genus

A new species of stenopodid shrimp of the genus Stenopus, S. goyi, is described on the basis of material from Taiwan, Philippines, Sri Lanka and the Maldive Islands. The new species is very unusual in that the dactyli of the fourth and fi fth pereopods bear one to three ungues. The colouration of the new species is also unique in the genus. The uniunguiculate or biunguiculate dactyli of the ambulatory pereopods were generally considered as a constant character in stenopodid shrimps and are used for generic diagnosis in the family, but variations in the number of ungues are found in S. goyi, new species, sometimes even among pereopods of the same specimen. The genus Stenopus is rediagnosed to accommodate the new species. Revised keys to the genera of Stenopodidae and species of Stenopus are provided.