Orthonevra nitida ( Wiedemann, 1830 )

Miranda, Gil F. G., Soares, Matheus M. M. & Thompson, Christian, 2024, The Neotropical Orthonevra Macquart, 1829 (Diptera: Syrphidae), Zootaxa 5484 (1), pp. 1-78 : 51-54

Orthonevra nitida ( Wiedemann, 1830)

Chrysogaster nitidus Wiedemann 1830: 116 . Type-locality: North America (LT male NMW here designated). Osten Sacken 1858: 50 (catalog citation).

Orthoneura nitida . Schiner 1868: 368 (South America, note on type, differences from pictipennis ); Osten Sacken 1878: 121 (catalog citation).

Chrysogaster nitida . Williston 1886: 310 (catalog citation), 1891: 7 ( Mexico (Veracruz, synonymy); Aldrich 1905: 349 (catalog citation); Kertész 1910: 26 (catalog citation); Fluke 1957: 50 (catalog citation).

Chrysogaster (Orthoneura) nitida . Sedman 1959: 53 & 55, figs (male genitalia).

Chrysogaster (Orthonevra) nitida . Sedman 1964: 170, figs (eye, mesonotum, wing) (key reference, descriptive note, distribution).

Figs 27 and 28 .

Differential diagnosis. Pile of the face short and scale-like ( Fig. 27c, f ); eye with sub-anterior and middle very sinuous vittae (the former only ventrally) and complete fascia; scutum with 6 long more matte and darker vittae, medial pair tapering anteriorly and sub-medial pairs connect on both of their ends, also with a shorter and narrower sub-lateral vitta connected posteriorly to sub-medial pair, and a lateral vittate macula posterior to the transverse sulcus ( Fig. 27a, e ); wing with narrow dark vitta sub-apically (until anterior half of M1) and sub-apically on r1, vein M1 with slight angle medially (directed inwards to cell r4+5); basicosta with appressed black pile and two more prominent black setae apically; male genitalia asymmetrical [left surstylus bent in a right angle at basal 1/3 ( Fig. 28d ), right surstylus with dorsal short lobe and ventral elongated lobe ( Fig. 28c )].

Length. Body 4.48–5.99mm (n=3), wing 3.70–4.53mm (n=3); female 5.05–6.35mm (n=3), wing 4.11–5.16mm (n=3).

Distribution. Canada (southern Ontario to Nova Scotia), USA (Wisconsin to Massachusetts, south to Arizona and Texas) ( Fig. 41 ).

Comments. As a small correction to Sedman’s (1964) original observation on the asymmetrical male genitalia, it is the right surstylus that bears the dorsal lobe, not the left one. Records of specimens on flowers of Anemone , Baccharis , Aruncus , Ceanothus , Fragaria , Leucanthemum vulgare , Pastinaca , Prunus , Salix , and Viburnum ( Skevington et al. 2019 and notes on studied specimen labels). No map was generated for this species since it is restricted to the Nearctic region.

Material examined: CANADA. Ontario, Dwyer Hill, 22.vi.1984, J.R. Vockeroth (1 male CNC, CNC _ Diptera 107481); London , Middlesex Co., 30.vi.1985, D.M. Wood (1 female CNC, CNC _ Diptera 111457); Metcalfe, 20.x.1985, B.E.Cooper (1male CNC, CNC _ Diptera 107551); Strathroy, 5.vii.1925, H.F.Hudson (1female CNC, CNC _ Diptera 47449); Windsor, Ojibway prairie, spring garden, 42°15’24’’N 83°02’59’’W, 10.vii.2004, J.H. Skevington & L. Bartels (1 female CNC, CNC _ Diptera 264) ; Quebec, Beechgrove, 45°39’N 76°8’W, 27.vi.1989, J.R. Vockeroth (1 female CNC, CNC _ Diptera 111425); Gatineau Co., Masham Twp. , sphagnum bog, 3–7.vi.1974, D.M. Wood (1 male CNC, CNC _ Diptera 47429) . USA. Georgia, Brasstown Bald, Ga. Towns & Union Cos., 4700’, 1.vi.1965, J.G. Chilcott (1 male CNC, CNC _ Diptera 562) ; Illinois, McDonough Co. Macomb, 11–12.vi.1963,? (3 males CNC, CNC _ Diptera 47439–41); Scott Co., Bluffs , 29.viii.1951, A.T. McClay (1 male and 2 females CNC, CNC _ Diptera 47444– 6) ; Iowa, Lk. Anita , prairie grass, 11.vii.1984, H. Goulet (1 female CNC, CNC _ Diptera 107485) ; Maryland, Galena, Jct. 313 & 301, 17.vi.1964, J.G. Chilcott (1 female CNC, CNC _ Diptera 47448); Patuxent , 5.viii.1979, E.E. Grissell & M. Schauff (1 female CNC, CNC _ Diptera 107486) ; Mississippi, Ag. Coll. Miss., ??. v.1920, F.M. Hull (1 male and 1 female CNC, CNC _ Diptera 561 & 47425); Lafayette Co., ??.??.???, F.M. Hull (5 males and 3 females CNC, CNC_ Diptera 47442, 109754, 109756–8, 109760, 109766, 109771); …, ??. v.1945, F.M. Hull (1 female CNC, CNC _ Diptera 47438); …, ??.v–??. vi.1955, F.M. Hull (1 female CNC, CNC _ Diptera 47437); …, ??.v–??. vi.1962, F.M. Hull (1 male CNC, CNC _ Diptera 47424); Oxford, ??. vi.1941, F.M. Hull (1 female CNC, CNC _ Diptera 47434); …, ??. iv.1948, F.M. Hull (1 male CNC, CNC _ Diptera 47426) ; Nebraska, Dawson Co., Willow Island , 21.viii.1957, A.T. McClay (1 female CNC, CNC _ Diptera 171381) ; New Jersey, Atco, 12.vii.???, C.W. Johnson (1 female CNC, CNC _ Diptera 47432); Riverton , 29.vi.1920, F.M. Hull (1 female CNC, CNC _ Diptera 47431); Waterrock Knob, 6mi E, Mi. 445, 3500’, 9.vi.1965, J.G. Chilcott (1 male CNC, CNC _ Diptera 564) ; New York, Cortland Co., McLean Boga, 20.vi.1934, F.M. Hull (1 male CNC, CNC _ Diptera 47428); Ithaca , 22.vi.1936,? (1 male and 1 female CNC, CNC_ Diptera 47427 & …430) ; North Carolina, Paul’s gap, 2mi E Great Smoky Mountains National Park, 4700’, 8.vi.1965, J.G. Chilcott (1 male CNC, CNC _ Diptera 47419); Great Smoky Mountains National Park , Black camp gap, 4900’, 8.vi.1965, J.G. Chilcott (1 male CNC, CNC _ Diptera 47421); Haywood Co., Soco gap, 4337’, 4.vi.1962, J.G. Chilcott (1 female CNC, CNC _ Diptera 47436) ; Tennessee, Chester Co., Henderson, 24–25.v.2002, D.M. Wood (2 females CNC, CNC _ Diptera 96460–1); Great Smoky Mountains National Park , Indian gap, 5400’, 21.v.1965, J.G. Chilcott (1 male and 1 female on the same pin CNC, CNC _ Diptera 47442) ; Texas, Brownwood, 5.ix.1921, R.H. Painter (1 male CNC, CNC _ Diptera 47422); Welder Wildlife Ref., nr. Sinton , marsh, 19–23.iii.1965, J.G. Chilcott (1 male CNC, CNC _ Diptera 47423) ; Washington, Pullman, ??.??.????, F.M. Hull (3 males and 5 females CNC, CNC _ Diptera 109740–7) ; Virginia, Boykins, 10.vi.[18]95, C.W. Johnson (1 female CNC, CNC _ Diptera 47435); Camp Peary, ??. vi.1943, R.M. Boliart (1 male and 1 female on the same pin CNC, CNC _ Diptera 47447); Reddish Knob Lookout , 14.5km W Briery Branch, 1315m, 38.462306°N 79.241667°W, 21.vii.2009 (5 males and 3 females CNC, JSS18699–706 ); Taggles gap, Mi. 160 B. R. Pkwy., 18.v.1965, J.G. Chilcott (1 female CNC, CNC _ Diptera 47433) .

Figures

FIGURE 27. Orthonevra nitida (Wiedemann, 1830). a–c. Female: a. Habitus dorsal. b. Habitus lateral. c. Head, oblique lateral view. d–f. Male: d. Habitus dorsal. e. Habitus lateral. f. Head, oblique lateral view. Abbreviations: lvm: lateral vittate macula; sc: scale-like pile; slv: sub-lateral vitta; smv: sub-medial vitta.

FIGURE 28. Orthonevra nitida (Wiedemann, 1830), genitalia. a. Female, apex, dorsal view. b. Female, apex, ventral view. c–e. Male: c. Right surstylus, lateral view. d. Left surstylus, lateral view. e. Hypandrium, lateral view. Abbreviations: cerc: cercus; hypo: hypoproct; epi: epiproct; pg: postgonite; ph: phallus; sur: surstylus; s8: sternum 8; s9: sternum 9 (internal).

FIGURE 41. Distribution map for Orthonevra flukei (sedman, 1964), O. gli sp. nov., O. hypnotica sp. nov., O. nitidula (Curran, 1925), and O. sternolobosa sp. nov.