Aquarius najas ( De Geer, 1773)

Cianferoni, Fabio & Mazza, Giuseppe, 2012, The aquatic Heteroptera (Insecta: Hemiptera) of the “ Foreste Casentinesi, Monte Falterona e Campigna ” National Park (Central Italy), Zootaxa 3568, pp. 36-52 : 41-42

Aquarius najas ( De Geer, 1773)

Gerris (Aquarius) najas Zangheri 1966: 702 .

Aquarius najas Bacchi & Rizzotti Vlach 2005 : CD-ROM; 2007: CD-ROM; Terzani et al. 2012: 269.

RECORDS. Tuscany: Acquacheta torrent, 714 m, Piana dei Romiti, San Godenzo (FI), 19.V.2009, GM leg., 2 M, 2 F apt (CCFI); idem, 23.VII.2009 GM & GC leg., 2 IV, 5 III (CCFI); idem, 22.IX.2009, GM & GC leg., 1 M, 1 F apt (CCFI); Arno river, 670 m, between Ortaglia and Casotto, Londa (FI), 13.VII.2009, GM & GC leg., 1 III (CCFI); idem, 12.IX.2009, GM leg., 1 M apt (CCFI); Camaldoli torrent, 820 m, Poppi (AR), 9.VIII.2011, FC leg., 1 M macr (CCFI); Corsalone torrent, 523 m, near Siregiolo, Chiusi della Verna (AR), 23.VII.2008, GM leg., 3 V (M), 3 V (F) (CCFI); idem, 30.VIII.2008, GM leg., 1 M, 1 F apt, 1 F macr, 1 V (M), 1 V (F), 2 IV (CCFI); Eremo di Camaldoli lake, 1100 m, Poppi (AR), 8.VIII.2011, FC leg., 1 F macr (CCFI); Fiumicello torrent, 600 m, near Casalino, Pratovecchio (AR), 8.V.2009, GM & GC leg., 1 M, 1 F (CCFI); idem, 13.VII.2008, GM & GC leg., 1 F apt, 1 IV, 1 III, 1 II (CCFI); idem, 12.IX.2009 GM leg., 2 M, 1 F apt (CCFI); Fiumicello torrent, 770 m, Poppi (AR), 11.VIII.2011, FC leg., 1 V (M), 1 IV apt (CCFI); Metaleto lake, 900 m, Poppi (AR), 8.VIII.2011, FC leg., 1 F macr (CCFI); Oia torrent, 525 m, Ponte Biforco, Stia (AR), 27.VI.2003, FT leg., 1 M, 1 F apt (TCFI); idem, 22.VII.2008, GM & ET leg., 1 M, 1 F apt (CCFI); idem, 28.VIII.2008, GM leg., 1 M apt, 1 V (F), 1 IV, 1 III (CCFI); idem, 29.IX.2008, GM leg., 3 M, 1 F apt, 2 V (M) (CCFI); Oia torrent, 700 m, Papiano, Stia (AR), 25.VI.2006, FC & GM leg., 2 M, 2 F apt (CCFI). Emilia-Romagna: Bidente di Campigna torrent, 660 m, near Sant’Agostino, Santa Sofia (FC), 18.V.2009, GM leg., 1 M, 1 F apt (CCFI); idem, 24.VII.2009 GM & GC leg., 1 IV (CCFI); idem, 18.IX.2009, GM leg., 1 M, 1 F apt (CCFI); Bidente di Pietrapazza torrent, 480 m, near Mulino delle Cortine, Bagno di Romagna (FC), 20.VI.2008, GM & ML leg., 1 M, 1 F apt (CCFI); idem, 18.VIII.2008, FC. leg., 1 M, 1 F apt, 1 V (M), 1 IV, 1 III (CCFI); idem, 5.X.2008, GM leg., 3 M apt (CCFI); Campigna, Santa Sofia (FC), 1947, (SCVI) ( Bacchi & Rizzotti Vlach 2005; 2007); Campigna, Burraia, Santa Sofia (FC) ( Zangheri 1966); Forconali torrent, 698 m, La Lama, Bagno di Romagna (FC), 21.VI.2008, FC & GM leg., 2 M, 1 F apt (CCFI); La Lama, Bagno di Romagna (FC), 1961 ( Bacchi & Rizzotti Vlach 2005; 2007); La Lama, Bagno di Romagna (FC) ( Zangheri 1966); San Benedetto in Alpe, Portico and San Benedetto (FC), 1947, (ZCVI) ( Zangheri 1966; Bacchi & Rizzotti Vlach 2005; 2007); Valbonella, botanical garden pool, 712 m, Santa Sofia (FC), 10.V.2008, GM & FT leg., 1 M apt (MZUF).

Remarks. This is an European species (with its range extending to the Maghreb). It is very common throughout Italy, but absent at high elevations in the Alps, and is restricted to flowing water bodies (torrents and streams).