FIRST RECORDS OF AQUATIC HETEROPTERA FROM FRIULI-VENEZIA GIULIA (ITALY) Fabio CIANFERONI 1,2 and Simone CIANFANELLI 1 1 Natural History Museum of the University of Florence, Zoological Section “La Specola”, via Romana 17, I-50125, Florence, Italy; E-mail: fabio.cianferoni@unifi.it 2 Institute of Agroenvironmental and Forest Biology, CNR - National Research Council of Italy, via Salaria 29.300, I-00015, Monterotondo Scalo (Rome), Italy Abstract – Two species of aquatic Heteroptera are recorded for Friuli-Venezia Giulia (Italy) for the first time: Anisops sardeus sardeus Herrich-Schäffer, 1849 (Nepomorpha, Notonectidae) and Gerris (Gerris) argentatus Schummel, 1832 (Gerromorpha, Gerridae). Remarks on their general distribution are also given. KEY WORDS: Hemiptera, Nepomorpha, Gerromorpha, Anisops sardeus, Gerris argentatus, Friuli-Venezia Giulia, first records. Izvleček – PRVI NAJDBI VODNIH STENIC (HETEROPTERA) V FURLANIJI- JULIJSKI KRAJINI (ITALIJA) Dve vrsti vodnih stenic sta prvič zabeleženi za Furlanijo-Julijsko krajino (Italija): Anisops sardeus sardeus Herrich-Schäffer, 1849 (Nepomorpha, Notonectidae) in Gerris (Gerris) argentatus Schummel, 1832 (Gerromorpha, Gerridae). Podane so tudi pripombe o njihovi splošni razširjenosti. KLJUčNE BESEDE: Hemiptera, Nepomorpha, Gerromorpha, Anisops sardeus, Gerris argentatus, Furlanija-Julijska krajina, prvi podatki. The knowledge of the aquatic Heteroptera (sensu Polhemus & Polhemus 2008) is still far from perfect in Italy, especially concerning their distribution (Cianferoni & Terzani 2013). The study of some recently collected samples in Friuli-Venezia Giulia (Italy) allowed us to identify two species which were not previously recorded for this region: 143 ACTA ENTOMOLOGICA SLOVENICA LJUBLJANA, DECEMBER 2015 Vol. 23, øt. 2: 143–146