Gerris (Gerris) costae costae (Herrich-Schaeffer, 1850)

Damgaard, 2006, 2008a (phyl.); Klingenberg, 1992 (geogr. var.); Wagner & Zimmermann, 1955 (syst.). Distribution: Kment & Smékal, 2002 (Czech Republic): Cianferoni, 2011 (Sardinia?).