Cheilosia (Cheilosia) fraterna (Meigen, 1830)

Prokhorov, A. V., Popov, G. V., Shparyk, V. Yu. & Vasilyeva, Yu. S., 2020, New Records Of Hoverflies (Diptera, Syrphidae) From Ukraine. V, Zoodiversity 54 (3), pp. 237-258 : 240-242

Cheilosia (Cheilosia) fraterna (Meigen, 1830) ( figs 9–21 )

M a t e r i a l e x a m i n e d. Ukraine. Rivne Region: Bushcha env.: 50.29 N 26.28 E, Zbytynka River floodplain, 11.05.2018, 1 {, 1}, 19.05.2019, 1}; 50.30 N 26.24 E, Zbytynka River floodplain forest, 12.05.2018, 2}, 18.05.2019, 1 {(A. Prokhorov) .

D i s t r i b u t i o n: Austria, Belarus, Belgium, Bosnia and Herzegovina, the Czech Republic, Denmark, Finland, France, Germany, Great Britain, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, European Russia, Serbia, the Slovak Republic, Slovenia, Spain, Sweden, Switzerland; Transcaucasia (the Republic of Georgia) ( Bańkowska, 1963; Peck, 1988; Verlinden, 1991; Maibach et al., 1992; Kuznetzov, 1993; Dirickx, 1994; Belcari et al., 1995; Vujić, 1996; Holinka & Mazánek, 1997; Wolff, 1998; Nielsen, 1999; Carrières, 2001 a; Stubbs & Falk, 2002; Stănescu & Pârvu, 2005; Pakalniškis et al., 2006; De Groot & Govedič, 2008; Bartsch et al., 2009 b; Mielczarek, 2009 –2020; Reemer et al., 2009; Tóth, 2011; Van Eck, 2011; Van Steenis et al., 2013; Borodin & Borodina, 2014; Haarto & Kerppola, 2014; Ricarte & Marcos-García, 2017; Barkalov & Mutin, 2018; Speight et al., 2018; Mengual et al., 2020; Speight, 2020; Wakkie, 2020); Ukraine (first record).

Diagnosis. Cheilosia fraterna is most similar to C. bergenstammi (see above). The male of C. fraterna ( figs 9–16 ) is also similar to C. sootryeni in having lower part of compound eye bare ( figs 14–16 ) (in C. sootryeni , lower part of compound eye may be bare or with a single pile); from C. sootryeni it can be distinguished by: tergites with mostly pale pile (in C. sootryeni , tergites 2 and 3 with black short macrotrichia posteromedially); tibiae with yellow apexes occupying almost 1/3–1/4 length of tibia ( fig. 10 ), at that hind tibia may be entirely yellow (in C. sootryeni , tibiae with yellow apexes occupying not more than 1/8–1/6 length of tibia); fore tarsus black dorsally ( fig. 12 ) with at least tarsomeres 1+2 pale laterally, mid tarsus ( fig. 13 ) with first tarsomere usually pale and tarsomeres 2–5 darkened dorsally (in C. sootryeni , all tarsi black dorsally).

Genitalia of C. fraterna have been prepared and compared with figures in Stubbs & Falk (2002: Plate I, fig. 1 , a–d).

The female ( figs 17–21 ) of C. fraterna is very similar to C. chloris (Meigen, 1822) and C. bracusi Vujić & Claussen, 1994 . From C. chloris it can be separated by: arista black at the base ( fig. 20 ) (in C. chloris , arista yellow at the base); compound eye with the lower part (almost half of the eye) bare ( figs 20–21 ) (in C. chloris , eye with the small lowest part bare or with single pile).

Figures

Figs 9–16. Cheilosia fraterna male: 9 — habitus, dorsal view; 10 — habitus, lateral view; 11 — hind femur and tibia, lateral view; 12 — fore tarsus, dorsal view; 13 — mid tarsus, dorsal view; 14 — head, anterolateral view; 15 — head, frontal view; 16 — head, lateral view.

Figs 17–21. Cheilosia fraterna female: 17 — habitus, dorsal view; 18 — habitus, lateral view; 19 — mesonotum, lateral view; 20 — head, anterolateral view; 21 — head, frontal view.

Figs 1–8. Cheilosia bergenstammi male: 1 — habitus, dorsal view; 2 — habitus, lateral view; 3 — hind femur and tibia, lateral view; 4 — fore tarsus, dorsal view; 5 — mid tarsus, dorsal view; 6 — head, anterolateral view; 7 — head, frontal view; 8 — head, lateral view.