Gerris (Gerris) costae costae (Herrich-Schaeffer, 1850) (Gerridae) Asian Turkey. Hoberlandt (1952a), Önder et al. (2006). Turkey (not distinguished). Kanyukova (1982), Kıyak & Özsaraç (2001). General distribution. The nominotypical subspecies is limited to the Alps (Austria, Germany, Liechtenstein, Slovenia, Switzerland) (Andersen 1995). Contrary to Andersen (1995), there is no reliable record of the species from the Czech Republic (Kment & Smékal 2002). Comment. All the Turkish records belong to Gerris costae fieberi. However, the validity of the subspecies of G. costae was questioned by Damgaard (2006) (see Distribution paragraph of G. costae fieberi above). Identification. Andersen (1994).