Gerris (Gerris) argentatus Schummel, 1832

Material examined. Tzanata, unnamed east lake, 60 m a.s.l., 38.13299° N 20.75431° E (WGS84; uncertainty = 80 m), 23.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 2 ♀♀ micr., 1 ♀ macr., CFCF; Agios Nikolaos, Limni (= lake) Avithos, 290 m a.s.l., 38.17134° N 20.71032° E (WGS84; uncertainty = 10 m), 26.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 1 ♂, 1 ♀ micr., CFCF .

General distribution. This is a Sibero-European species (see Cianferoni & Mazza 2012, Damgaard et al. 2014).

Remarks. This is the first record of this species from Cephalonia.