Phytomyza pulchelloides Henshaw & Howse, 1989

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 pulchelloides Henshaw & Howse

Figs 822-824

Phytomyza pulchelloides Henshaw & Howse, 1989: 84 [new name for P. pulchella ].

Phytomyza pulchella Spencer in Spencer and Steyskal 1986b: 320 [junior homonym of P. pulchella Spencer 1977: 228].

Description.

Wing length 3.2-3.7 mm (♂), 3.4-4.1 mm (♀). Vein dm-m absent. Eye height divided by gena height: 2.4-5.1. First flagellomere well-developed, slightly longer than high, apically rounded and with dorsal and ventral margins parallel in part. Ocelli forming equilateral triangle, ocellar triangle indistinct. Epistoma present, not exceptionally large with width 1/4-1/2 length. Parafacial and fronto-orbital plate produced towards anterodorsal margin of eye. Cheek narrow, elongate, not continuing along eye posteriorly.

Chaetotaxy: Three or four ori; one ors. Ocellar and postocellar setae longer than fronto-orbitals. Four dorsocentrals, decreasing in length anteriorly. Four rows of acrostichal setulae.

Colouration: Head dark brown with first flagellomere darker, centre of frons and gena (excluding ventral margin) paler, but dark ocellar spot usually extending outside tubercle, labellum contrastingly yellow. Thorax dark brown with small paler spot medially on notopleuron and at anterior and posterior corner of postpronotum. Wing veins yellow basally to brownish apically. Halter white. Calypter entirely yellow. Legs dark brown with apices of femora yellow for distance equal to width of femur apex; base and apex of tibiae gradually light brown to yellowish. Abdomen brown to dark brown with posterior (and sometimes posterolateral) margin of tergites and laterobasal margin of epandrium yellowish.

Genitalia: (Figs 822-824 ) Hypandrium subtriangular to evenly rounded apically; inner lobe narrow and strongly bent medially with one seta at elbow; adjoining membrane haired. Postgonite narrow when viewed laterally, strongly flattened medially. Phallophorus flanked by one pair of long bars that are darker and pointed apically. Halves of basiphallus narrow with apical 1/3 expanded, plate-like; crossing basally, left sclerite with ventrobasal arm. Hypophallus with one pair of apically converging bars that are elongate, apically pointed, and flanking dark, upcurved medial V-shaped sclerite. Paraphallus absent. Duct pigmented apically. Mesophallus dark and cylindrical with rounded base, length 3 × width, fused via narrow band to distiphallus. Distiphallus divided into one pair of narrow dark tubules that are slightly outcurved apically, but are strongly curved dorsally on basal 2/3. Ejaculatory apodeme with short stalk and very broad, rounded apical blade; sperm pump with strong transverse sclerite.

Distribution.

USA: NY*, VA.

Host.

Likely Ranunculaceae ( Spencer and Steyskal 1986b).

Type material.

Holotype: USA. VA: Smyth Co., Mt. Rogers, 4700-5800 ft, 1.vi.1962, J.R. Vockeroth (1♂, CNC).

Paratypes examined.

USA. VA: Same collection as holotype, CNC480185-480187 (3♂, CNC).

Additional material examined.

USA. NY: Ithaca , 17.v.1936, H.K. Townes, A.L. Melander (1♀, USNM), Bear Mtn., 31.v.1937, A.L. Melander (1♂ 1♀, USNM), VA: Fairfax Co., Turkey Run Park , 0.3 km W mouth Turkey Run, 38°58'N, 77°09.6'W, Malaise trap, river, 14-17.v.2006, D.R. Smith (1♂, USNM) .

Figures

Figures 822 - 824. Phytomyza pulchelloides Henshaw and Howse, male genitalia 822 hypandrium and postgonite, ventral 823 hypandrial complex, left lateral 824 phallus, ventral.