New water strider species of Eurymetra from Madagascar (Hemiptera: Heteroptera: Gerridae)

Abstract

The Madagascan material of the halobatine genus Eurymetra Esaki, 1926 (Hemi-ptera: Heteroptera: Gerridae: Halobatinae), which is deposited at the Natural History Museum Vienna, is revised. A close examination of “Eurymetra madagascariensis Poisson, 1945” revealed two new species, Eurymetra santamariae sp. nov. and Eurymetra papaceki sp. nov. A definition of the newly established Eurymetra madagascariensis species group is provided as well as keys to the freshwater halobatine genera and to Eurymetra species known from Madagascar.