Liriomyza eupatoriella 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

Liriomyza eupatoriella Spencer

Figs 595-598

Liriomyza eupatoriella Spencer in Spencer and Steyskal 1986b: 288. Eiseman and Lonsdale 2018: 49.

Description.

Wing length 1.6-1.7 mm (♂), 1.8 mm (♀). Length of ultimate section of vein M4 divided by penultimate section: 4.0. Eye height divided by gena height: 2.1-4.3.

Chaetotaxy: Two ori; two ors. Acrostichal setulae in four rows.

Colouration: Head yellow with clypeus brownish, ocellar tubercle and back of head brown, vertical setae on yellow. Scutum shiny and dark brown with postpronotum, notopleuron, and posterolateral (to inner postalar) and posterior margins yellow. Scutellum yellow with lateral corner brown. Metanotum yellow with mediotergite brown. Pleuron yellow with small anteroventral spot on anepisternum, and most of anepimeron and meron brown. Calypter margin and hairs brown. Legs yellow with tibiae and tarsi light brown, hind leg darkest. Abdomen dark brown.

Genitalia: (Figs 595-598 ) Epandrium with single posterodistal spine. Surstylus small and lobate/subtriangular with two long subapical spines. Hypandrium thin with inner lobe not discernable in original holotype dissection. Postgonite cleft on inner face apically and with small inner subapical lobe. Basiphallus evenly sclerotised on left side and with apical projection. Hypophallus small, narrow, and curved. Mesophallus short with small floating ventrobasal sclerite and dorsobasal extension. Distiphallus slightly longer than mesophallus, narrow and cup-shaped.

Hosts.

Asteraceae - Ageratina , Vernonia ( Spencer and Steyskal 1986b; Eiseman and Lonsdale 2018).

Distribution.

USA: IA, KS, MA, MD, MN [leaf mine], VA, WI.

Type material.

Holotype: USA. WI: Dane Co., Madison, 12.ix.1976, mining Eupatorium rugosum , em. 28.ix.1976, S. Tavormina (1♂, USNM).

Paratypes examined.

USA. WI: Dane Co., Madison, 13.ix.1976, S. Tavormina , adult on Eupatorium rugosum (2♀, USNM).

Additional material examined.

USA. IA: Winneshiek Co., 43°25'55.97"N, 92°0'34.78"W, 16.vii.2015, C.S. Eiseman, Ageratina altissima , em. 22-23.vii.2015, #CSE1797, CNC654352, CNC654353 (2♂, CNC), KS: Riley Co. , Konza Prairie Biological Station , 3.vii.2015, em. 21-26.vii.2015, C.S. Eiseman, ex Vernonia baldwinii , #CSE1768, CNC564709, CNC564710 (2♂, CNC), MA: Franklin Co. , Northfield, 276 Old Wendell Rd. , 6.vi.2016, C.S. Eiseman, Ageratina altissima , em. 22-28.vi.2016, #CSE2613, CNC654063-654069 (5♂ 2♀, CNC), 276 Old Wendell Rd. , 6.vi.2016, C.S. Eiseman, Ageratina altissima , em. 30.vi-7.vii.2016, #CSE2677, CNC654081- 654087 (3♂ 4♀, CNC), MD: Somerset Co., Snow Hill, 16.vii.1968, swamp margin, W.W. Wirth (1♀, USNM), VA: Shenandoah, Big Meadows, 3.vii.1939, A.L. Melander (1♀, USNM) .

Comments.

The pale, narrow phallus of Liriomyza eupatoriella closely resembles that of the much more common and widespread species L. trifolii and L. sativae , but the yellow posterior margin on the scutum and the rounded surstylus with two closely spaced subapical spines are distinctive.

Figures

Figures 595 - 598. Liriomyza eupatoriella Spencer 595 phallus, left lateral, Iowa male 596 same, ventral 597 phallus, left lateral, male holotype 598 same, remainder of genitalia.