Microprosthema granatense, new species, from the southern Caribbean, with a key to shrimps of the genus Microprosthema from the western Atlantic and a new record of Odontozona libertae (Decapoda: Stenopodidea)

The shrimp Microprosthema granatense, new species, is described and illustrated from material collected in Granate Bay, Caribbean coast of Colombia. This male shrimp was collected together with 3 ovigerous females of the stenopodidean Odontozona libertae Gore around the talus pile of the burrow of a tilefish. Microprosthema granatense differs from other species of Microprosthema mainly by having few spinous processes and spines on the carapace, a larger cornea, different spination of the third maxilliped and third pereiopod, and very long and multisegmented fourth and fifth pereiopods. Comparisons with other species of the genus are made and a key for the species of Microprosthema of the western Atlantic is provided. The record of Odontozona libertae constitutes the first for the southern Caribbean.