Gerris (Gerris) caucasicus Kanyukova, 1982

Fent, Meral, Kment, Petr, Çamur-Elipek, Belgin & Kirgiz, Timur, 2011, Annotated catalogue of Enicocephalomorpha, Dipsocoromorpha, Nepomorpha, Gerromorpha, and Leptopodomorpha (Hemiptera: Heteroptera) of Turkey, with new records 2856, Zootaxa 2856 (1), pp. 1-84 : 43

Gerris (Gerris) caucasicus Kanyukova, 1982

( Figs. 33–34 )

Material examined. ASIAN TURKEY: Çorum province: Boğazkale env., Yazılıkaya (N 40°01'32.8" E 34°37'54.1"), 1160 m a.s.l., small pool by parking place, 18.v.2005, 1 ♂ (ma), P. Kment lgt. & det. ( NMPC) . Sivas province: Zara env., Tödürge Gölü [lake] (N 39°53' E 37°37'), northern shore by university station, 25.vi.2002, 1 ♀ (mi) ( Figs. 33–34 ), P. Kment lgt. & det. ( NMPC) .

Asian Turkey. Andersen (1995); this paper. First exact records from Turkey.

Turkey (not distinguished). Andersen (1994), Kıyak & Özsaraç (2001), Önder et al. (2006), Kanyukova (2006).

General distribution. South European Territory of Russia (Krasnodarsk region, Adygea, Kabardino-Balkaria, Daghestan), Georgia, Armenia, Azerbaijan, Anatolia, and north-western Iran ( Kanyukova 1982, 2006; Andersen 1995; Linnavuori & Hosseini 2000; Damgaard & Cognato 2005; Prokin et al. 2009). The record of Gerris (Geriselloides) kiritshenkoi Kanyukova, 1979 from Iraq ( Linnavuori 1994), later attributed to G. caucasicus ( Andersen 1995, Kanyukova 2006) was finally described as distinct species G. (Gerris) kabaishanus Linnavuori, 1998 ( Linnavuori 1998) .

Identification. Kanyukova (1982, 2006), Andersen (1994), Linnavuori (1998), Linnavuori & Hosseini (2000). This species is very similar to G. argentatus , but differs in the following characters: middle and hind femora pale brown with black apex in G. caucasicus (brown with black longitudinal stripe along its entire dorsal surface in G. argentatus ) ( Kanyukova 1982, 2006); rudiments of hemelytra in micropterous specimens larger in G. caucasicus (very small and hardly apparent in G. argentatus ) ( Linnavuori 1998; see also Figs. 32–33 ); structure of apices of connexiva and male and female genitalia ( Kanyukova 1982, 2006; Andersen 1994; Linnavuori 1998); and larger size— G. caucasicus : 6.5–11.5 mm; G. argentaus : 5.2–8.3 mm ( Kanyukova 1982, 2006; Andersen 1994). Males are mostly smaller than females in both sexes. Linnavuori (1998) gave measurements of micropterous females as follows: G. caucasius 9.0–10.0 mm, G. argentatus 7.5–8.0 mm.

Figures

FIGURES 32–34. 32—Gerris (Gerris) argentatus Schummel, 1832, female (Antalya province: Perge near Aksu, body length 6.7 mm); 33–34—Gerris (Gerris) caucasicus Kanyukova, 1982, female (Sivas province: Tödürge Gölü, body length 8.9 mm).