Agromyza echinalis, Lonsdale, 2021

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

publication ID

http://dx.doi.org/10.3897/zookeys.1051.64603

publication LSID

lsid:zoobank.org:pub:639E252D-4392-4ABB-910B-CEA5D8AD2487

persistent identifier

http://treatment.plazi.org/id/02F82A6C-4335-4C13-B490-994AE0B6BC66

taxon LSID

lsid:zoobank.org:act:02F82A6C-4335-4C13-B490-994AE0B6BC66

treatment provided by

ZooKeys by Pensoft

scientific name

Agromyza echinalis
status

sp. nov.

Agromyza echinalis   sp. nov.

Figs 232-235 View Figures 225–235

Description.

Externally as described for A. bispinata   except as follows: Wing length 2.5-2.6 mm (♂). Female unknown. Length of ultimate section of vein M4 divided by penultimate section: 0.6. Eye height divided by gena height: 4.2. First flagellomere always enlarged in male, broadly ovate, slightly longer than high and covered with long hairs past base. Additional ori sometimes present on one side of frons. Wing veins yellow. Antenna orange with brownish tint, mostly brownish past base of first flagellomere; frons tinted with orange; fore tibia yellow with centre brownish.

Genitalia: (Figs 232-235 View Figures 225–235 ) Surstylus large and triangular with numerous long spines along inner margin and with one spine at apex; basal suture obliterated, inner surface flat and easily viewed posteriorly. Hypandrium and postgonite as described for A. bispinata   . Halves of basiphallus with medial membranous process that is longer and truncated on right side. Distiphallus of " Agromyza nigripes   -type" (capsule-shaped with subbasal opening for entry of ejaculatory duct, pronounced dorsobasal collar, and medial convolution); ventral curve with dark truncated elbow; ventral surface with medial longitudinal suture; sides shallowly rounded and internally spinulose subapically.

Host.

Unknown.

Distribution.

USA: MD, TN, VA.

Etymology.

Gr., referring to the characteristic spiny surstylus.

Type material.

Holotype: USA. TN: Clarksville, 13.v.1936, E.W. Howe (1♂, USNM).

Paratypes: USA. MD: nr. Plummers Isl., 6.vi.1914, R.C. Shannon (1♂, CNC), VA: Fairfax Co., Dead Run, 19.vi.1915, R.C. Shannon (1♂, USNM).

Comments.

The heavily spinulose surstylus of Agromyza echinalis   is the primary defining feature that distinguishes it from other species with an enlarged first flagellomere. As in A. tacita   (Figs 226-228 View Figures 225–235 ) and A. hockingi   (Colorado, Texas, Utah; Spencer and Steyskal 1986b: figs 411-413), the surstylus is triangular and clearly visible laterally, but these other two species have a slightly darker and more rounded surstylus with a maximum of five stout spines.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Agromyzidae

Genus

Agromyza