Neocnemodon verrucula (Collin, 1931)

Prokhorov, A. V., Popov, G. V., Shparyk, V. Yu. & Vasilyeva, Yu. S., 2023, New Records Of Hoverflies (Diptera, Syrphidae) From Ukraine. Vi, Zoodiversity 57 (2), pp. 125-142 : 129-131

Neocnemodon verrucula (Collin, 1931) ( figs 23–28 )

M a t e r i a l e x a m i n e d. Ukraine. Kyiv Region: Mygalky env.: Teteriv River floodplain : 50.656771 N 29.497553 E, 21.04.2018, 1 ♀; 50.657344 N 29.499463 E, 28.04.2019, on flowers of Salix sp. , 1 ♀, 4.05.2020, on flowers of Salix sp. , 1 ♀; 50.655066 N 29.494565 E, edge of Teteriv River floodplain forest, 24.04.2020, 1 ♀ ,

29.04.2021, 4 Ơ; Nova Buda env., 50.684214 N 29.708405 E, swampy glades in mixed forest, 5.05.2021, on flowers of Caltha palustris , 3 ♀ (A. Prokhorov).

D i s t r i b u t i o n. Belgium, Denmark, Finland, Germany, Great Britain, Latvia, the Netherlands, Norway, Poland, Sweden; Russia (European parts, Siberia, Far East); Mongolia ( Bańkowska, 1963 (as Cnemodon ); Peck, 1988; Verlinden, 1991; Kuznetsov, 1993; Wolff, 1998; Nielsen, 1999 (as Heringia ); Stubbs & Falk, 2002 (as Heringia ); Bartsch et al., 2009 b; Reemer et al., 2009 (as Heringia ); Haarto & Kerppola, 2014; Barkalov & Mutin, 2018; Speight, 2020; Rojo & Aracil, 2021; Wakkie, 2021 (as Heringia )); Ukraine (first record).

Diagnosis. The male of Neocnemodon verrucula (Collin, 1931) ( figs 23–25 ) is similar to males of other Neocnemodon species in having hind trochanter with a long projection and third antennal segment usually no longer than wide (very occasionally 1.5 times longer than wide) ( Bartsch et al., 2009 b). N. verrucula is easily distinguished from N. latitarsis (Egger, 1865) and N. fulvimanus (Zetterstedt, 1843) by sternite 3 not having a keel ( fig. 25 ) (in other species, sternite 3 with a small central keel). From N. brevidens (Egger, 1865) , N. pubescens (Delucchi & Pschorn-Walcher, 1955) , N. vitripennis (Meigen, 1822) and N. larusi (Vujić, 1999) it differs by sternite 4 with a small, central knob ( fig. 25 ) and thorax with mainly pale pile (in other species, sternite 4 without central knob and thorax with pale and/or dark pile ( Bartsch et al., 2009 b).

The female of Neocnemodon verrucula ( figs 26–28 ) is similar to other species of the genus in having postpedicel usually less than 1.5 times longer than broad ( fig. 28 ) and, except N. brevidens , frons with spots of pubescent lacking or less distinct, together covering less than quarter of width of frons (in N. brevidens , frons with spots of pubescent together covering more than 1/3 of width of frons). N. verrucula differs from other species by eyes with short and sparse pilosity ( fig. 28 ) (in other species, eyes with dense (short or long) pilosity); frons from depression to base of antennae with almost exclusively pale pile ( fig. 28 ) (in other species, frons from depression to base of antennae with extensive intermixture of black pile ( Bartsch et al., 2009 b).

Figures

Figs 23–28. Neocnemodon verrucula: 23, 26 — male (23) and female (26), habitus, dorsal view; 24, 27 — male (24) and female (27), habitus, lateral view; 25 — male abdomen, ventral view; 28 — female head, anterolateral view.