Cerodontha (Icteromyza) longipennis (Loew)

Lonsdale, Owen, 2021, Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the " Delmarva " states, ZooKeys 1051, pp. 1-481 : 1

Cerodontha (Icteromyza) longipennis (Loew)

Figs 103 , 535-538

Agromyza longipennis Loew, 1869: 48. Melander 1913: 255; Malloch 1913: 296, 1934: 478.

Dizygomyza (Icteromyza) longipennis . Hendel 1931: 56 [as possible synonym of lineella Zetterstedt].

Phytobia (Icteromyza) longipennis . Frick 1952a: 393, 1959: 386.

Cerodontha (Icteromyza) longipennis . Spencer 1969: 140, 1990: 346; Sehgal 1971: 324; Spencer and Steyskal 1986b: 89; Boucher 2012: 139; Eiseman and Lonsdale 2019: 10.

Description

(Fig. 103 ). Wing length 1.6-2.6 mm (♂), 2.5-2.9 mm (rarely 1.9-2.2 mm) (♀). Length of ultimate section of vein M4 divided by penultimate section: 1.0-1.1. Eye height divided by gena height: 5.6-7.7. Lunule semi-circular, slightly higher than wide. Fronto-orbital plate not defined. Ocellar triangle ill-defined, apparently ending at or before lunule.

Chaetotaxy: Two ori (anterior seta slightly reduced to absent, but usually 1/2-2/3 length); two ors. Ocellar and postocellar setae slightly longer than fronto-orbitals. Four dorsocentral setae, slightly decreasing in length anteriorly, but sometimes two anterior setae both short. Acrostichal seta absent. Apparently six irregular rows of acrostichal setulae ending in front of level of posterior dorsocentral.

Colouration: Body subshiny with frons slightly velvety. Setae dark brown with paler shine. Antenna dirty orange to brownish, with pedicel browner and distal margin yellow, and male first flagellomere browner on basal 1/2 of inner surface and along dorsal margin; female first flagellomere dark brown to brown with orange tint that may predominate along base; frons light yellow, becoming whitish anteriorly on fronto-orbital plate; ocellar spot larger than tubercle, dark brown; posterolateral corner of frons dark brown to base of inner vertical seta or slightly beyond; dark brown posteriorly to base of posterior or anterior ors, with pigment often fading to absent in front of posterior ors; lunule light yellow; occiput, gena, parafacial and face yellowish white; mouthparts, including palpus yellow; clypeus brown with centre paler brown to yellow; back of head dark brown. Thorax dark brown with moderate greyish pruinosity. Calypter margin and hairs light yellow. Wing veins brown with base yellow. Halter yellow. Legs dark brown with tibiae and tarsi paler brown; distal 1/2 of coxae variably yellowish, at least apically on mid coxa; distal 35-50% of femora light yellow, but this sometimes reduced to 25% on mid and hind legs; tibiae narrowly yellow basally. Abdomen dark brown.

Genitalia: (Figs 535-538 ) Epandrium with process above anus well-developed. Surstylus fused to epandrium, with four to seven tubercle-like setae. Cercus large, prominent. Lobe of subepandrial sclerite dark, tapering apically. Hypandrium tapering to a point. Basiphallus with right lateral process emerging medially. Hypophallus narrow, rod-like. Paraphallus absent. Mesophallus very narrow, elongate, cylindrical, constricted medially and with abruptly narrower, darker base; narrowed basal section of variable length, ranging from 1/4-1/3 length of segment. Distiphallus divided into one pair of very narrow tubules that become paler apically and are slightly flared at opening; broadly arched backwards, sometimes reaching midpoint of mesophallus. Ejaculatory apodeme with moderately large blade that becomes paler marginally; sperm pump with basal pigment. See Boucher (2012) for discussion of variation of northern and western specimens.

Host.

Cyperaceae - Carex pseudocyperus L. Juncaceae - Juncus xiphioides E. Mey.

Distribution.

Canada: AB, BC, MB, NT, NS, ON, QC, SK. USA: AK, AR, CA, CT, FL, IA, ID, IL, IN, KS, LA, MA, MD, ME, MI, MN, MS, MT, NC, NE, NH, NJ, NV, NY, OK, OR, PA, SD, TN, TX, VA, VT, WA, WI, WV, WY.

Type material.

Holotype: USA. DC. "Loew coll.", Type No. 13436 (1♀, MCZ). [Not examined]

Material examined.

Canada. AB: Lethbridge , 5.vi.1929, J.H. Pepper, CNC480922 (1♂ CNC), McMurray, 6.viii.1963, G.E. Ball, CNC480978 (1♀, CNC), BC: Terrace, 10 mi N, 16.vii.1960, B. Heming, CNC481008 (1♀, CNC), MB: Aweme, 24.viii.1916, N. Criddle, CNC480933 (1♂ CNC), 27.viii.1917, CNC480905, CNC480934, CNC480982 (2♂ 1♀, CNC), 28.viii.1917, CNC480981 (1♀, CNC), 4.ix.1923, H.A. Robertson, CNC480935 (1♂ CNC), Treesbank, 18.x.1927, N. Criddle, CNC480979 (1♀, CNC), NB: St. Andrews , 8.vii.1957, G.E. Shewell, CNC480977 (1♀, CNC), NT: Yellowknife, Kam Lake , 20.vi.1966, G.E. Shewell, CNC480908 (1♂ CNC), ON: Algonquin Provincial Park, Whitefish Lake Group Campground , 45°33'47.01"N, 78°26'13"W, 414 m, 28.vi-2.vii.2008, J.andA. Skevington, Malaise trap, CNC339240 (1♀, CNC), Ottawa, Stony Swamp, Beaver Trail, 45°18'0"N, 75°49'16"W, 13.vi.2015, O. Lonsdale, CNC441040, CNC441081, CNC441097 (2♂ 1♀, CNC), Sudbury Dist. , Killarney Provincial Park, Lake of the Woods Trail, 46°6'36"N, 81°11'48"W, 2.ix.2014, O. Lonsdale, CNC380796 (1♀, CNC), Bell’s Cor., 21.ix.1951, J.F. McAlpine, CNC480880, CNC480912, CNC480971 (2♂ 1♀, CNC), Bells Corners, 28.vi.1971, H.J. Teskey, CNC480915 (1♂ CNC), Constance Bay Rd. , Harwood Plains , 19.vii.1967, G.E. Shewell, CNC480972, CNC480973 (2♀, CNC), Grand Bend, 15.vii.1939, G.E. Shewell, CNC480970 (1♀, CNC), Marmora, 12.viii.1952, J.F. McAlpine, CNC481014 (1♀, CNC), on weeds by water, 7.viii.1952, CNC481015 (1♀, CNC), Mattawa, 16.vi.1987, J.R. Vockeroth, CNC480911 (1♂ CNC), Metcalfe, 30.vii.1983, B.E. Cooper, CNC480907 (1♂ CNC), Midland, 20.v.1959, J.G. Chillcott, CNC480909 (1♂ CNC), 20.viii.1955, J.G. Chillcott, CNC480969 (1♀, CNC), Miners B., 26.v.1939, G.E. Shewell, CNC480920, CNC480960-480962 (1♂ 3♀, CNC), Newtonville, 26.ix.1983, J.R. Vockeroth, CNC481011 (1♀, CNC), Normandale, 42°42'N, 80°19'W, 2.vi.1956, J.R. Vockeroth, CNC480963, CNC480964 (2♀, CNC), Ottawa, Black Rapids, 28.vii.1959, J.R. Vockeroth, CNC481013 (1♀, CNC), Ottawa, 12.vi.1957, J.G. Chillcott, CNC480872 (1♂ CNC), 14.v.1957, CNC480879, CNC480954 (1♂ 1♀, CNC), 19.vi.1957, CNC480951 (1♀, CNC), 23.v.1957, CNC480953 (1♀, CNC), 26.v.1958, CNC480878, CNC480952 (1♂ 1♀, CNC), 12.vii.1956, J.R. Vockeroth, CNC480950 (1♀, CNC), 2.vi.1958, CNC480946 (1♀, CNC), 3.vi.1958, CNC480873-480877, CNC480947-480949 (5♂ 3♀, CNC), 19.vii.1946, G.E. Shewell, CNC480871 (1♂ CNC), Point Pelee, 9.ix.1954, W.R. Mason, CNC480966, CNC480967, CNC480968 (3♀, CNC), W.R.M. Mason, CNC480924, CNC480925 (2♂ CNC), Port Severn , 3mi N, Black spruce bog, 18.v.1959, J.G. Chillcott, CNC480910, CNC480917, CNC480965 (2♂ 1♀, CNC), Pr. Edward Co., Outlet Beach, 14.viii.1968, J.R. Vockeroth, CNC480914 (1♂ CNC), Pt. Pelee Nat. Pk., 1.ix.1983, S. Marshall, C. Logan and S. Grigsby, dry Malaise, CNC480916 (1♂ CNC), Rockport, 12.v.1959, J.R. Vockeroth, CNC481012 (1♀, CNC), Rondeau Park, 7.ix.1954, W.R.M. Mason, CNC480926, CNC480927, CNC480928 (3♂ CNC), Simcoe, 13.vi.1939, G.E. Shewell, CNC480929 (1♂ CNC), 24.vi.1939, CNC480958 (1♀, CNC), 29.v.1939, CNC480930 (1♂ CNC), 30.v.1939, CNC480931, CNC480932 (2♂ CNC), 6.vi.1939, CNC480959 (1♀, CNC), St. Williams , 42°40'N, 80°25'W, 23.v.1956, J.R. Vockeroth, CNC480919 (1♂ CNC), Thornhill, 30.v.1964, J.R. Vockeroth, CNC480881-480884, CNC480904, CNC480918, CNC480955-480957 (6♂ 3♀, CNC), QC: Gatineau Park, Lac Philippe, 45°36'N, 76°0'W, 23.v.2011, O. Lonsdale, CNC481032 (1♀, CNC), Beech Grove, 15.v.1961, J.F. McAlpine, CNC480975 (1♀, CNC), Beechgrove, 45°39'N, 76°8'W, 5.vii.1984, J.R. Vockeroth, CNC480906, CNC481010 (1♂ 1♀, CNC), Cap Rouge, 4.vii.1953, R. Lambert, CNC480974 (1♀, CNC), Wakefield, 9.vii.1946, G.E. Shewell, CNC480921, CNC480976 (1♂ 1♀, CNC), SK: Hudson Bay , 15.ix.1959, J.R. Vockeroth, CNC481009 (1♀, CNC), Waskesiu Lake, 12.vii.1939, A.R. Brooks, CNC480923 (1♂ CNC), Yorkton, 15.ix.1959, J.R. Vockeroth, CNC480980 (1♀, CNC) . USA. IL: 5mi S Bath, 21.v.1953, J.F. McAlpine, CNC480890 (1♂ CNC), Champagne Co., 26.iv.1926, J. Savage, CNC480983 (1♀, CNC), Champagne , 3.x.1956, J.F. McAlpine, CNC480985-480987 (3♀, CNC), Champaigne , 2.x.1956, J.F. McAlpine, CNC480887 (1♂ CNC), nr. Forest City , Mason St. Forest , 21.v.1953, J.F. McAlpine, CNC480984, CNC480888 (1♂ 1♀ CNC), KS: Lawrence , Nat. Hist. Res., 28.iv.1956, J.G. Chillcott, CNC480886 (1♂ CNC), LA: Alexandria , 11 mi SW, Palmetto swamp, 26.iii.1960, J.G. Chillcott, CNC480899-480903, CNC480988-480990 (5♂ 3♀, CNC), MN: Crookston , river valley, 21.v.1960, J.G. Chillcott, CNC481016 (1♀, CNC), NC: Highlands , 1158 m, 23.viii.1957, J.G. Chillcott, CNC481006 (1♀, CNC), 27.viii.1957, CNC481007 (1♀, CNC), 10.v.1957, J.R. Vockeroth, CNC480940 (1♂ CNC), 16.vi.1957, CNC481001 (1♀, CNC), 5.v.1957, CNC480885, CNC480938, CNC480939, CNC481002-481005 (3♂ 4♀, CNC), 6.v.1957, CNC480891 (1♂ CNC), 1158 m, leaf mine in submerged Carex in stream, 8.vii.1957, CNC480889-481000 (1♂ 2♀, CNC), PA: Union Co. , Lewisburg , 26.viii.1981, J.R. Vockeroth, CNC480936, CNC480937 (2♂ CNC), TN: East Ridge , 9.iv.1952, G.S. Walley, CNC480945 (1♂ CNC), 9.v.1952, CNC480997, CNC480998 (2♀, CNC), TX: Big Bend N.P., Oak Springs , 1371 m, 1.v.1959, J.F. McAlpine, CNC480894 (1♂ CNC), Big Bend N.P., Oak Spring , 1.v.1959, J.F. McAlpine, CNC480895 (1♂ CNC), Brazos Co. , College Station , 26.iii.1966, D.M. Wood, CNC480892, CNC480893, CNC480991 (2♂ 1♀, CNC), Kerrville , cedar, 1.iv.1959, J.F. McAlpine, CNC480913, CNC480941-480944, CNC480992, CNC480993 (5♂ 2♀, CNC), VA: Giles Co. , Mountain Lake , 1158 m, 26.v.1962, J.G. Chillcott, CNC480995 (1♀, CNC), Giles Co. , Stony Creek , 609 m, 26.v.1962, J.R. Vockeroth, CNC480994 (1♀, CNC), Patrick Co. , Fairy Stone St. Pk. , 304 m, 30.v.1962, J.R. Vockeroth, CNC480896-480898, CNC480996 (3♂ 1♀, CNC) .

Figures

Figures 99 - 106. 99 Cerodontha (Butomomyza) angulata (Loew), head, anterior 100 Cerodontha (Phytagromyza) frankensis Spencer, head, anterior 101 Cerodontha (Poemyza) muscina (Meigen), head, anterior 102 Cerodontha (Poemyza) incisa (Meigen), head, anterior 103 Cerodontha (Icteromyza) longipennis (Loew), head, anterior 104 Cerodontha (Xenophytomyza) illinoensis (Malloch), head, anterior 105 Cerodontha (Dizygomuza) morosa (Meigen), head, anterior 106 Cerodontha (Cerodontha) dorsalis (Loew), (K. Matz - Utah, Salt Lake City).

Figures 535 - 540. Cerodontha (Icteromyza) longipennis (Loew), male genitalia 535 hypandrium and postgonite, ventral 536 ejaculatory apodeme 537 phallus, ventral 538 phallus, left lateral 539, 540 C. (I.) vockerothi Boucher (illustrations from Boucher 2012) 539 apex of phallus, left lateral 540 same, ventral.