A new species of the genus <i>Ovobopyrus</i> (Isopoda: Bopyridae) parasitizing a snapping shrimp (Decapoda: Alpheidae) from Brazil

Abstract A new species of parasitic isopod of the genus Ovobopyrus is described from one parasitized specimen of the snapping shrimp Alpheus carlae , collected from the state of Pernambuco, northeastern Brazil. It is the second species of the genus and the first record of the genus from Brazil. The adult female of Ovobopyrus odoya sp. nov. is diagnosed by having the head produced into small anterolateral projections: antennule with three articles; maxilliped subquadratic with a non-articulated palp bearing nine long setae, oostegite 1 having a digitate ridge with five small lobes, carpi of all pereopods with tufts of setae distally, and terminal pleomere bilobed. A comparative table, an identification key, and a distribution map for species of the genus are provided. In addition, an identification key for all Bopyrinae genera from Brazil is also provided.