Agromyza soka Eiseman & Lonsdale, 2018

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

Agromyza soka Eiseman & Lonsdale

Figs 221-224

Agromyza soka Eiseman & Lonsdale, 2018: 13.

Description

(from Eiseman and Lonsdale 2018). Wing length 2.3-2.5 mm (♂), 2.3-3.0 mm (♀). Length of ultimate section of vein M4 divided by penultimate section: 0.6-0.7. Eye height divided by gena height: 6.9-9.2. Ocellar triangle relatively small and rounded. First flagellomere small and nearly circular or slightly longer than high, with nearly indistinct apical tuft of pale hairs. Notum pruinose.

Chaetotaxy: Two or three ori (anterior seta small if present); two ors. Ocellar and postvertical setae subequal to outer vertical seta. Five dorsocentrals, strongly decreasing in length anteriorly. Eight irregular rows of acrostichal setulae. Mid tibia with one (male paratype) or two posteromedial setae.

Colouration: Setae dark brown with light brown reflection. Body predominantly dark brown (female darker) with light pruinosity; antenna dirty orange with distal 1/2 of first flagellomere infuscated (more so dorsally) in holotype, entirely brown in paratypes, with antenna entirely dark brown in female; frontal vitta, gena and postgena paler; apices of fore or all femora narrowly yellow; tarsi yellow; fore tibia light brown, fading to yellow at base. Calypter white with hairs brown. Halter white.

Genitalia: (Figs 221-224 ) Surstylus not distinct from epandrium, barely visible laterally, flat on inner surface and with four large spines. Cerci narrow and convergent. Hypandrium broad with thick arch, small apical process, and large inner lobe with two distal setae and several minute basal pits. Postgonite lobate and downturned. Proepiphallus and metepiphallus strongly reduced, flattened. Phallophorus elongate on left side. Halves of basiphallus strongly diverging from, and partially fused to phallophorus; lateromedially with lightly sclerotised membranous lobe; apex folded inwards, with pointed basal process and elongate distal process that is fused to mesophallus. Hypophallus broad, flat, and heavily sclerotised; apically split in dissected NC male. Mesophallus cylindrical, dark, basally rounded, slightly longer than wide, fused to distiphallus. Distiphallus broad, black, ventrally tilted and cup-like with constricted opening enclosing haired inner process. Ejaculatory apodeme well-developed with blade paler, no medial rib evident.

Host.

Fabaceae - Robinia pseudoacacia , Wisteria floribunda .

Distribution.

USA: CT, NC, VA.

Type material.

Holotype: USA. VA: nr. Plummers Isl., 20.v.1914, R.C. Shannon (1♂, USNM).

Paratypes: USA. CT: Hartford Co., East Hartford, Two Rivers Magnet Middle School, 4.vi.2016, em. 27-29.iv.2017, C.S. Eiseman, ex Robinia pseudoacacia , #CSE3574, CNC939943-939946 (3♂ 1♀, CNC), NC: Scotland Co., Laurinburg, St. Andrews University, 24.iv.2015, em. 16-18.iii.2016, T.S. Feldman, ex Robinia pseudoacacia , #CSE2248, CNC653954, CNC653955 (1♂ 1♀, CNC), 10.iv.2017, Robinia pseudoacacia , em. 22.iv.2018, #CSE4423, CNC1135665 (1♂, CNC), 4.iv.2016, em. 18.iv- 3.v.2017, T.S. Feldman, ex Wisteria floribunda , #CSE3518, CNC939744-939747 (1♂ 3♀, CNC).

Figures

Figures 221 - 224. Agromyza soka Eiseman & Lonsdale 221 hypandrium and postgonite, ventral 222 external genitalia, left lateral 223 hypandrial complex, left lateral 224 phallus, ventral. Originally published in Eiseman and Lonsdale (2018).