Phytobia amelanchieris (Greene)

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

Phytobia amelanchieris (Greene)

Figs 675-677

Agromyza amelanchieris Greene, 1917: 316.

Phytobia amelanchieris . Frick, 1952a: 390, 1959: 375; Spencer 1969: 102; Spencer and Steyskal 1986b: 78.

Description

(Figs 675-677 ). Wing length 3.0-4.4 mm (♂), 3.1-4.8 mm (♀). Length of ultimate section of vein M4 divided by penultimate section: 1.2-1.3. Eye height divided by gena height: 2.1-2.7.

As described for P. setosa except as follows: fronto-orbitals usually slender, four to six ori, one ors (difference in orientation pronounced); uncommonly with three ori on one or both sides, but if so, wing length always smaller and orange tint reduced to absent on frons and gena; orbital setulae erect; ocellar and postocellar setae longer than fronto-orbitals; acrostichal seta as long or longer than anterior dorsocentral; mid tibia with only two posteromedial setae; sides of buccal cavity converging anteriorly; length of epistoma usually equal to width of space between arms of clypeus; antenna always mostly orange with distal region of first flagellomere brown; cheek and parafacial thicker, more pronounced; frons grey, usually with only anteromedial region narrowly to more broadly orangish; epandrium brown to light brown with orange tint; base of distiphallus slightly wider than and distinctly darker than tubules (seen laterally). Paratype dissected by Spencer with long, cruciate, posterolateral “interfrontal” setae.

Variation: Some ON specimens with palpus dirty orange to orange, similar to P. betulivora , but orange colour dull, and pale region on frons restricted to anterior 1/3 or less. Female from WA with very long fronto-orbitals (6 ori) and large epistoma; with small fifth dorsocentral; pruinosity brownish, not grey; parafacial and fronto-orbital plate strongly swollen; eye height divided by gena 1.4.

Host.

Rosaceae - Amelanchier canadensis .

Distribution.

Canada: AB*, BC, MB, NB*, NS*, ON, QC, SK. USA: CA*, KS*, MA, MI, NC, TN, VA, WA, WV.

Type material.

Holotype: USA. WV: French Creek, Quaintance No. 9444, F.E. Brooks (1♀, USNM; type No. 21063).

Paratypes examined.

USA. MI: Gladwin Co., 18.v.1946, R.R. Dreisbach (1♀,USNM), WV: French Creek, F.E. Brooks, Quaintance No. 9444 (3♂ 2♀, USNM).

Additional material examined.

Canada. AB: Waterton , 8.vi.1962, K.C. Hermann, CNC391688 (1♀, CNC), BC: Fife , 5mi E, 8.vi.1959, R.E. Leech, CNC391646 (1♀, CNC), Lethbridge , vi.1967, N.L.H. Krauss (1♀, USNM), MB: Ninette , bur oak community, 7.v.1958, J.F. McAlpine, CNC391614, CNC391632, CNC391633, CNC391615 (2♂ 2♀, CNC), at margin of beaver pond, 9.v.1958, J.F. McAlpine, CNC391631, CNC391609, CNC391611, CNC391616 (3♂, 1♀, CNC), NB: Kouchibouguac N.P., 20.v.1977, W.P. Hanley, Code - 5098B, CNC391682 (1♂, CNC), 22.v.1977, Hanley and Cooper , Code - 5111O, CNC391651 (1♀, CNC), 23.v.1977, B. Cooper, Code - 5113Q, CNC391648 (1♀, CNC), W.P. Hanley, Code - 5112P, CNC391649 (1♀, CNC), 25.v.1977, B. Cooper, Code - 5133K, CNC391650 (1♀, CNC), NS: CBHNt. Pk., Mackenzie Mtn., 400 m, birch and fir, 27.v.1984, B.E. Cooper, PG639848 , CNC391680 (1♂, CNC), 28.v.1984, CNC391687 (1♀, CNC), 29.v.1984, CNC391681 (1♂, CNC), ON: Griffith, 7mi E, 1.vi.1985, B.E. Cooper, CNC391675 (1♂, CNC), 1.viii.1982, CNC391686 (1♀, CNC), Griffith, 15.v.1982, B.E. Cooper, CNC391647 (1♀, CNC), Lanark Co., N. Burgess Twp., 30.iv.1972, D.M. Wood, CNC391685 (2♂ / ♀, CNC), Mer Bleue Bog, Ottawa, 14.v.1965, CNC391676 (1♂, CNC), Metcalfe, 12.v.1982, B.E. Cooper, CNC391619 (1♂, CNC), 12.v.1983, CNC391663-391665, CNC391669, CNC391670, CNC391674 (5♂ 1♀, CNC), 14.v.1983, CNC391661, CNC391620, CNC391621, CNC391626, CNC391628, CNC391629 (6♂, CNC), 14.v.1994, CNC391652, CNC391653, CNC391655, CNC391656, CNC391671 (5♂, CNC), 17.v.1994, CNC391673 (1♂, CNC), 18.v.1983, CNC391624 (1♂, CNC), 25.v.1983, CNC391662 (1♂, CNC), 3.v.1983, CNC391666, CNC391668 (2♂, CNC), 3.v.1994, CNC391659, CNC391660 (2♂, CNC), 30.iv.1983, CNC391622, CNC391623, CNC391625, CNC391627 (4♂, CNC), 4.v.1994, CNC391658 (1♂, CNC), 6.v.1983, CNC391667 (1♂, CNC), 7.v.1994, CNC391654, CNC391657 (2♂, CNC), 9.v.1983, CNC391672 (1♂, CNC), Ottawa, 45°21'N, 75°45'W, city garden, 1-15.iv.2010, H. Goulet, Malaise trap, CNC391679 (1♂, CNC), Ottawa, 12.v.1965, B.V. Peterson, CNC391677 (1♂, CNC), Ottawa, damp second growth Acer - Betula wood, 29.v.1997, J.R. Vockeroth, CNC391678 (1♂, CNC), Rockport, 9.v.1961, C.H. Mann, CNC391612 (1♂, CNC), QC: Beechgrove, 15.v.1961, J.F. McAlpine, CNC391634, CNC391635 (2♀, CNC), 45°39'N, 76°8'W, 15.v.1961, J.R. Vockeroth, CNC391683, CNC391610, CNC391636-CNC391645 (2♂, 10♀, CNC), Farnham, 5.vi.1963, J.R. Vockeroth, CNC391608 (1♂, CNC), Gatineau Pk., Harrington Lk., 30.v.1954, J.E.H. Martin, CNC391607 (1♂, CNC), SK: Sask. Landing, 50°39'N, 107°56'W, 25.v.1955, J.R. Vockeroth, CNC391618 (1♂, CNC), Saskatoon, 23.v.1940, A.R. Brooks, CNC391630 (1♀, CNC), 29.iv.1949, CNC391613 (1♂, CNC), 6.v.1949, CNC391617 (2♂ / ♀, CNC) . USA. CA: Lake Tahoe , 20.vi.1963, A.L. Melander (1♂, USNM), KS: Lawrence, Nat. Hist. Res., 28.iv.1956, J.G. Chillcott, CNC391684, CNC391815, CNC391816 (3♂, CNC), WA: Deer Park, 5.v.1912, A.L. Melander (1♀, USNM) .

Comments.

Greene (1917) discussed the larvae of Phytobia amelanchieris , which were collected "Nearly full-grown" from the roots and the base of the trunk of Canadian serviceberry from early June to early July. Differences between this species and P. setosa are very slight and provided only tentatively here, and specimens with fewer, thicker fronto-orbitals can be difficult to diagnose; the boundaries of these two species should be re-evaluated following the collection of additional specimens.

Figures

Figures 675 - 678. Phytobia amelanchieris (Greene), male genitalia 675 ejaculatory apodeme 676 hypandrium and postgonite, ventral 677 hypandrial complex, left lateral 678 P. betulivora Spencer, male, phallapodeme, epiphallus, phallus and ejaculatory apodeme, right lateral.