Phytomyza aquilegiana Frost, 1930

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

Phytomyza aquilegiana Frost

Figs 735-740

Phytomyza aquilegiae Hardy. Misidentification, in part. Melander 1913: 271.

Phytomyza bipunctata Loew. Misidentification, in part. Melander 1913: 271.

Phytomyza plumiseta Frost. Misidentification, in part (specimens on Aquilegia ). Frost 1930: 459.

Phytomyza aquilegiana Frost, 1930: 459. Frick 1959: 424; Spencer 1969: 227; Spencer and Steyskal 1986b: 192; Scheffer and Lonsdale 2018: 88; Eiseman and Lonsdale 2018: 68.

Description.

Wing length 2.2-2.8 mm (♂), 2.5-2.8 mm (♀). Vein dm-m absent. Eye height divided by gena height: 3.3-4.5. Hairs on first flagellomere slightly longer and bushier, but not comparable to other species such as P. lactuca . Cheek narrow.

Chaetotaxy: Two ori (anterior ori slightly to strongly reduced in length); two ors. Acrostichal setulae in four scattered rows that may become more regular anteriorly; sometimes appearing as five rows. Four dorsocentrals, decreasing in length anteriorly.

Colouration: Head yellow with antenna black, and back of head and clypeus dark brown; palpus brownish to dark brown; posterolateral corner of frons to base of inner vertical seta dark brown, with spot sometimes faintly continuing narrowly along margin of eye to posterior ors; ocellar triangle dark brown, anterior corner rounded, slightly larger than tubercle, especially posterolaterally where corners bulge outwards to almost touch dark spot at base of vertical setae; face faintly brownish. Thorax dark brown with light dusting of brownish grey pruinosity (less so on pleuron); sometimes indistinct yellowish mottling on postpronotum and notopleuron along suture. Halter white. Calypter white with hairs brown. Legs dark brown with apex of femora yellow, tibiae yellowish to base and apex, and tarsi yellow with distal segments becoming darker. Abdomen dark brown.

Genitalia: (Figs 735-740 ) Hypandrium well-developed, thickest at apex, inner lobe with projecting medial spinulose membrane and several empty sockets. Postgonite broad and pointed apically with one seta and two sockets. Halves of basiphallus narrow, separate; left sclerite abruptly S-shaped at base, right sclerite with wide basal extension. Hypophallus with one pair of short, narrow converging sclerites. Paraphalli converging, small, with rounded irregular base and narrow apical process. Mesophallus tubular, lightly sclerotised, apically widened to join distiphallus; with small dorsobasal band across surface. Distiphallus divided into two dark, slightly twisted arms that are shorter than mesophallus. Ejaculatory apodeme as long as wide, with stem and base short and narrow, blade becoming clear to distal margin.

Hosts.

Ranunculaceae - Aquilegia , Ranunculus ( Benavent-Corai et al. 2005).

Distribution.

Canada: AB, BC, MB, ON, YT. USA: MA, MD, NC, NY, PA, VA*.

Type material.

Holotype: USA. PA: Arendteville, 3.v.1928, S.W. Frost, blotch mine A. vulgaris (1♂, USNM, type No. 50023).

Paratypes examined.

USA. PA: Arendteville, S.W. Frost, blotch mine A. canadensis (1♂, USNM), Arendtville, S.W. Frost, meadow rue (2♀, USNM), Arendteville, S.W. Frost, blotch mine, Aq. vulgaris , 8.v.1928 (1♀, USNM), 2.v.1928 (1♀, USNM).

Additional material examined.

Canada. MB: Aweme , 1.v.1930, R.M. White, Columbine leaf miner CNC480062, CNC480060 (1♂, 1♀, CNC), ON: Ottawa, damp second growth Acer - Betula wood, 13.viii.1991, J.R. Vockeroth, CNC480065 (1♂, CNC), 2.viii.1993, CNC480064 (1♂, CNC), 6.viii.1992, CNC480066 (1♂, CNC), 7.viii.2000, CNC480067 (1♂, CNC), St. Lawrence Is. Nat. Park, McDonald Is., 7.vii.1976, A. Carter, Code 4352-L, CNC480061 (1♂, CNC) . USA. CA: SL Obispo, I.J. Condit, 13.i.1912, bred from Aquilegia (5♂ 2♀, USNM), 13.i.1912 (6♂ 2♀, USNM), Los Angeles Co., Westwood Hills, 19.x.1940, ex. Columbina , R.M. Bohart (2♀, USNM), MA: Hampshire Co. , Pelham, 88 Arnold Rd. , 31.v.2012, em. 25.v.2012, C.S. Eiseman, ex blotch mine on Aquilegia vulgaris (2♂ [with puparia] 1♀, CNC), MD: Montgomery Co. , Colesville, W.W. Wirth, 21.v.1977 (1♂, USNM), 4.vi.1977 (1♀, USNM), 1.v.1977 (1♂ 1♀, USNM), Malaise trap, Bethseda, 22.vii.1972, G.C. Steyskal (1♂, USNM), ME: bred, Bar Harbor, 8.viii.1938, A.E. Brower (1♂ 3♀, USNM), NC: Durham Co. , Durham, Pelham Rd., 21.v.2015, T.S. Feldman, Aquilegia , em. 6.vi.2015, #CSE1623, CNC564653-564656;CNC564657 (1♂ 4♀, CNC), VA: Shenandoah, Big Meadows, A.L. Melander, 15.vi.1941 (1♂, USNM), 1.vii.1939 (1♀, USNM). Location unknown. miner Aquilegia CNC480063 (6♂ / ♀ [same pin], CNC) .

Figures

Figures 735 - 740. Phytomyza aquilegiana Frost, male genitalia 735 external genitalia, posterior 736 postgonite, lateral 737 hypandrium, ventral 738 ejaculatory apodeme 739 phallus, ventral 740 phallus, left lateral.