A new species of Thor Kingsley, 1878 (Crustacea: Decapoda: Caridea: Hippolytidae) from the tropical eastern Pacific

A new caridean shrimp, Thor cocoensis, from the eastern Pacific, is described based on specimens from from Isla del Coco, Costa Rica and Islas Marchena and Santa Fe, Galapagos. This very small shrimp resembles T. cordelli Wicksten, but lacks a supraorbital spine and has one or two, not three, dorsal spines on the rostrum. There are three or four pairs of dorsolateral spines on the telson and one meral spine each on the third and fourth pereopods. The species is subtidal and is not known to have specific associations with other organisms.