Cheilosia (Cheilosia) uviformis Becker, 1894

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 : 245-247

publication ID

https://doi.org/ 10.15407/zoo2020.03.237

persistent identifier

https://treatment.plazi.org/id/C20EE536-9618-456D-5AE6-FDF4FE38FC2C

treatment provided by

Felipe

scientific name

Cheilosia (Cheilosia) uviformis Becker, 1894
status

 

Cheilosia (Cheilosia) uviformis Becker, 1894 View in CoL ( figs 30–35 View Figs 30–35 )

M a t e r i a l e x a m i n e d. Ukraine. Kyiv Region: Kyiv, Muromets Is. on Dnipro River , 50.5058 N 30.5443 E, on flowers of Acer platanoides , 6.04.2017, 1 {, 18.04.2018, 1 {(A. Prokhorov) GoogleMaps .

D i s t r i b u t i o n: Belgium, Denmark, Great Britain, Finland, France, Germany, Ireland, Italy, Lithuania, the Netherlands, Norway, Serbia, Slovenia, Sweden, Switzerland ( Peck, 1988; Verlinden, 1991; Maibach et al., 1992; Dirickx, 1994; Vujić, 1996; Nielsen, 1999; Stubbs & Falk, 2002; Pakalniškis et al., 2006; De Groot & Govedič, 2008; Bartsch et al., 2009 b; Reemer et al., 2009; Haarto & Kerppola, 2014; Speight et al., 2018; Speight, 2020; Verlinden, 2020; Wakkie, 2020); Ukraine (first record).

Diagnosis.The Cheilosia uviformis male looks like the males of C. urbana (Meigen, 1822) and C. psilophthalma Becker, 1894 , and it can also be confused with small specimens of C. rufimana Becker, 1894 .

From C. urbana and C. psilophthalma it can be distinguished by: frons densely covered in microtrichia ( fig. 34 View Figs 30–35 ) (in others, frons covered in faint microtrichia, weakly shiny except the edges along the eyes); face almost entirely with fine but distinct pruinescence including the facial tubercle, only lowest edge of face shiny (in others, frons with facial tubercle and upper mouth-edge distinctly shiny, rarely the facial tubercle may also be finely pruinose); all tibiae entirely yellow or with very vague brownish smudge on each side of tibia ( fig. 31 View Figs 30–35 ) (in others, all tibiae yellow with black incomplete ring); abdomen entirely with pale pile, tergites 2 and 3 without short semi-adpressed macrotrichia posteromedially (in others, abdomen usually at least with a few black macrotrichia, tergites 2 and 3 with short semiadpressed macrotrichia posteromedially); sternites 2–4 dull ( fig. 32 View Figs 30–35 ) (in others, sternites 2–4 shiny).

Cheilosia uviformis can be easily distinguished from C. rufimana by katepisternum with upper and lower patches of pile widely separated (in C. rufimana , katepisternum with upper and lower patches of pile confluent).

Morphological characters of our specimens are completely consistent with those in Speight & Claussen (1987: as Cheilosia argentifrons Hellen, 1914 ). Genitalia of both specimens have been prepared and compared with figures in Speight & Claussen (1987: fig. 2 View Figs 1–8 , f, g) and Stubbs & Falk (2002: Plate M, fig. 1 View Figs 1–8 , a–c).

Note. In Great Britain this species is listed under the UK Biodiversity Action Plan and qualifies as Data Deficient ( Ball & Morris, 2014).

Here we offer an updated key to Ukrainian Cheilosia males of the group D sensu Beck- er (1894), which have tibiae with pale parts.

Key to males of Ukrainian Cheilosia species group D (tibiae with pale parts)

1 Katepisternum with upper and lower patches of pile confluent. ................................................................. 2

— Katepisternum with upper and lower patches of pile widely separated. ..................................................... 3

2 Face width at the level of the antennal sockets exceed eye width at the same level. ..................................... .................................................................................................................................. C. morio (Zetterstedt, 1838) View in CoL

— Face width at the level of the antennal sockets less than eye width at the same level. ................................. ....................................................................................................................................... C. proxima View in CoL species group

3 Tergites covered in grey patches of microtrichia, which usually look like maculae. ................................. 4

— Tergites entirely black. .........................................................................................................................................5

4 Compound eye with pale pile. ............................................................................ C. semifasciata Becker, 1894 View in CoL

— Compound eye with dark pile. ................................................................... C. fasciata Schiner & Egger, 1853 View in CoL

5 Compound eye entirely pilose (lower part sometimes more sparcely). ...................................................... 6

— Lower part of compound eye bare or with a single pile. ............................................................................. 12

6 Frons densely covered in pale-grey microtrichia ( fig. 34 View Figs 30–35 ) as well as orbital strip (this is clearly visible against the general background of the face); sternites 2–4 dull ( fig. 32 View Figs 30–35 ). ........... C. uviformis Becker, 1894 View in CoL

— Frons shiny or with faint pruinescence (mostly along eye margins), also faintly pruinose on orbital strip; sternites 2–4 shiny. ............................................................................................................................................. 7

7 Compound eye with pale pile; abdomen slender, with almost parallel sides. ............................................ 8

— Compound eye with dark pile; abdomen oval, usually wider. .................................................................... 10

8 Arista with distinct short microtrichia. ................................................................ C. mutabilis (Fallén, 1817) View in CoL

— Arista seems bare (with very short microtrichia). ......................................................................................... 9

9 Claws with yellow bases. .......................................................................................... C. urbana (Meigen, 1822) View in CoL

— Claws black. ........................................................................................................ C. psilophthalma Becker, 1894 View in CoL

10 Abdomen with the largest width at the posterior margin of tergite 3; tergite 4 with adpressed short black seta-shape macrotrichia along central axis; legs dark, fore and mid tibiae with weak brown bases and apexes, hind tibia black with indistinct brown base. ............................................ C. carbonaria Egger, 1860 View in CoL

— Abdomen with the largest width at the posterior margin of tergite 2; tergite 4 with erect and (or) semiadpressed macrotrichia along central axis; all tibiae yellow or pale brown with dark ring, or mostly black with yellow or brown bases and apexes. ........................................................................................................ 11

11 Mesonotum black, usually with a bluish tinge, predominantly with black pile; tergite 5 dull in contrast with shiny tergite 4. ................................................................................................ C. cynocephala Loew, 1840 View in CoL

— Mesonotum black, usually without a bluish tint, predominantly with pale pile or with black and pale pile mixed; tergite 5 shiny as well as tergite 4. ................................................................ C. vernalis (Fallén, 1817) View in CoL

12 Tibiae black with pale parts; tarsomeres of all tarsi black dorsally and laterally. .......................................... ...................................................................................................................................... C. sootryeni Nielsen, 1970 View in CoL

— Tibiae pale with black parts (sometimes entirely pale); fore and mid tarsi not entirely black. .............. 13

13 Scutellum with pile and setae half or slightly more than half as long as scutellum ( fig. 10 View Figs 9–16 ), at that scutellum often without setae; abdomen more oval, distinctly with largest width at the posterior edge of tergite 2 ( fig. 9 View Figs 9–16 ); fore tarsus black ( fig. 12 View Figs 9–16 ) (tarsomeres 1+2 pale laterally and ventrally), mid tarsus black except first tarsomere usually pale ( fig. 13 View Figs 9–16 ); hind tibia with weak, incompletely developed dark ring ( fig. 11 View Figs 9–16 ), which may be reduced. ............................................................................................ C. fraterna (Meigen, 1830) View in CoL

— Scutellum with pile and setae at least as long as scutellum ( fig. 2 View Figs 1–8 ); abdomen more slender, elongated-oval with almost parallel sides of tergite 3 ( fig. 1 View Figs 1–8 ); fore and mid tarsi with tarsomeres 1–3 entirely pale ( figs 4, 5 View Figs 1–8 ) (first tarsomere of fore tarsus may be darkened dorsally); hind tibia usually with distinct black ring occupying almost half of tibia ( fig. 3 View Figs 1–8 ). ............................................................ C. bergenstammi Becker, 1894 View in CoL

Subtribe Pelecocerina

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Cheilosia

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF