Eurymetra, Esaki, 1926

Zettel, Herbert, 2020, New water strider species of Eurymetra from Madagascar (Hemiptera: Heteroptera: Gerridae), Acta Entomologica Musei Nationalis Pragae 60 (1), pp. 15-22 : 17

Key to the Eurymetra species from Madagascar

1 In lateral view, eye just reaching base of mesopleuron. Large species, body length 4.6–4.8 mm, head width 1.60–1.67 mm. Dorsal surface of body predominately shiny in both sexes. Protarsi comparatively long, TTI = 36–43. Paramere near to base wide ( Fig. 12 ). ................ ....................................................... E. papaceki sp. nov.

– In lateral view, eye surpassing base of mesopleuron. Smaller species, body length <3.9 mm, head width <1.5 mm; if larger (body length up to 4.5 mm), then TTI <34. Dorsal surface with smaller shiny areas. Paramere near to base slender ( Figs 10, 11 ). ................................. 2

2 Pronotum very small, PHI = 75–80. Metapleuron without yellow spot above spiracle. Protarsus of moderate length, TTI = 34–38. ....... E. santamariae sp. nov.

– Pronotum moderately small, PHI = 85–90. Metapleuron above spiracle with yellow spot. Protarsus very short, TTI = 27–33. ........................................................... ............................ E. madagascariensis Poisson, 1945

Figures

Figs 10–12. Left paramere (lateral aspect): 10 – Eurymetra madagascariensis Poisson, 1945; 11 – E. santamariae sp. nov.; 12 – E. papaceki sp. nov.