Revision of Limnocoris (Heteroptera: Nepomorpha: Naucoridae) of North America

The North American species of Limnocoris are revised and total 13 species after the present study. Four new species are described and illustrated: L. chaetocarinatus n. sp. from Costa Rica, Panama, and Colombia; L. major n. sp. and L. nanus n. sp. from Costa Rica and Panama; and L. zacki n. sp. from Mexico and Guatemala. Further, supplemental descriptions are provided for the previously described species. The following synonymies are proposed, with junior synonyms in brackets: L. insularis Champion [ L. alcorni La Rivers n. syn. ], L. pygmaeus La Rivers [ L. solenoides La Rivers n. syn. ], and L. signoreti Montandon [ L. brailovskyi La Rivers n. syn. , L. laucki La Rivers n. syn. , L. stangei La Rivers n. syn. ]. A lectotype is designated for L. signoreti . Limnocoris profundus (Say) is considered a nomen dubium because no type specimens have been found and the original description is insufficient to establish its identity. An illustrated taxonomic key, distribution maps, and a discussion of the characters (putative synapomorphies) not previously mentioned in the literature also are presented.