FAMILY GERRIDAE LEACH

AXEL O. BACHMANN AND SILVIA A. MAZZUCCONI

Gerridae is the second richest family of semiaquatic bugs in Argentina, with 18 described species in 11 genera. Andersen (1982) classified the Gerridae in eight subfamilies, of which Charmatometrinae, Cylindrostethinae, Gerrinae, Halobatinae, Rhagadotarsinae, and Trepobatinae are represented in the Argentinean fauna. Two tribes are currently recognized in the Gerrinae, following the classification proposed by Andersen (1995): Gerrini and Tachygerrini, both of which are present in Argentina. The Halobatinae are classified in two tribes (Andersen and Weir 2004), and only the Halobatini have been recorded from Argentina. Four tribes are currently recognized in the Trepobatinae (Polhemus and Polhemus 2002), of which only the Metrobatini and the Trepobatini are recorded from the country.