Cianferoni, Fabio, Lorella Dell’olmo, and Lorenzo Lastrucci. 2015. “Review of Hydrometra gracilenta Horváth, 1899 (Hemiptera: Heteroptera: Hydrometridae) in Italy, With Notes on Its General Distribution”. Zootaxa 3980 (4). Auckland, New Zealand:584–590. https://doi.org/10.11646/zootaxa.3980.4.8.