Ophiomyia abutilivora Spencer, 1986

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

Ophiomyia abutilivora Spencer

Figs 71 , 72 , 329-331

Ophiomyia abutilivora Spencer in Spencer and Steyskal 1986b: 250; Eiseman et al. 2021: 16.

Description

(Figs 71 , 72 ). Wing length 2.0-2.3 mm (♂♀). Length of ultimate section of vein M4 divided by penultimate section: 0.6. Eye height divided by gena height: 5.0-5.7. Facial carina present with narrow medial bulb. Gena slightly angled forward, highest near midpoint of eye. Clypeus slightly tapering apically. Fronto-orbital plate very narrow, ocellar triangle nearly extending to posterior ori. Notum shiny.

Chaetotaxy: Orbital setulae reclinate. Male vibrissal fasciculus absent. Two ori; two ors. Mid tibia with one posteromedial seta.

Colouration: Body, including halter dark brown with gena paler. Wing veins yellow to brown. Calypter margin and hairs brown.

Genitalia: (Figs 329-331 ) Inner posterodistal margin of epandrium with rows of minute tubercles. Distal margin of surstylus broad and truncated with rows of pointed tubercle-like setae on inner surface. Metepiphallus with subapical spine. Basiphallus with slender dorsoventral arms, partially fused to phallophorus. Hypophallus membranous, carinate. Distiphallus small and spade-shaped (broad basally and strongly tapered apically); apex with long, tapered flagellum that has base surrounded by light sclerotisations; mesophallus narrow, barely wider than duct. Ejaculatory apodeme stout, well-developed, with blade relatively narrow.

Hosts.

Malvaceae - Abutilon theophrasti , A. permolle . Adults taken from Sida cordifolia ( Spencer and Steyskal 1986b) and possibly Alcea .

Distribution.

USA: DE*, FL, IA, MD*, MN, MS; stem mines only in IL and WI ( Eiseman et al. 2021).

Type material.

Holotype: USA. MN: Dakota Co., Rosemount, Agricultural Research Station, 13.ix.1978, R.N. Andersen and R. Ralston (1♂, USNM).

Paratypes examined

. USA. FL: Broward Co., Ft. Lauderdale, 14.iii.1980, H.E. Walker, Fl. Abutilon permolle , MN: Rosemount, 13.ix.1987, ex. Abutilion theophrasti (1♂ 3♀, USNM), MS: Stoneville, 22.x.1979, K.E. Frick, 79-25, ex. stem gall Abutilion theophrasti (4♂ 1♀, USNM), Merigold, 22.x.1979, K.E. Frick, 79-25, ex. stem gall Abutilion theophrasti (1♂ 2♀, USNM).

Additional material examined.

USA. DE: Newark , 6.ix.1960, hollyhock, P. Burbutis (2♂, USNM), Newark, “8/10/1953” (1♂, USNM), IA: Winneshiek Co., Decorah , Trout Run Trail , 43°18'5.04"N, 91°48'6.60"W, 10-13.viii.2017, J. van der Linden, Abutilion theophrasti , em. by 26.vii.2017, #CSE4940, CNC1643668, CNC1643669 (1♂ 1♀, CNC), MD: Montgomery Co., 4mi SW of Ashton, 6.ix.1981, Malaise trap, G.F. and J.F. Hevel (1♂, USNM) .

Comments.

The distiphallus of Ophiomyia abutilivora is highly reduced and lobate, with the apex continuing distally as a long membranous flagellum. A similar phallus is found in the larger O. tiliae , but the clypeus of this species is nearly rounded, the distiphallus appears pear-shaped when viewed ventrally, the apical flagellum points ventrally and there is one pair of membranous "wings" ventral to the distiphallus. Other putative Nearctic relatives (based on the genitalic figures in Spencer and Steyskal 1986b and Spencer 1969) are more western in distribution, including the Californian species O. bernardensis Spencer, O. shastensis Spencer, O. jacintensis Spencer, and O. yolensis Spencer, and possibly O. monticola Seghal from northern Canada and Alaska.

Figures

Figures 69 - 77. Ophiomyia simplex (Loew), head 69 anterior 70 lateral 71, 72 Ophiomyia abutilivora Spencer, head 71 anterior 72 lateral 73, 74 Ophiomyia ultima (Spencer), head 73 anterior 74 lateral 75 - 77 Ophiomyia coniceps (Malloch), head 75 anterior 76 lateral 77 ventral.

Figures 329 - 331. Ophiomyia abutilivora Spencer, male genitalia 329 external genitalia, ventral 330 hypandrial complex, left lateral 331 phallus, ventral.