Liriomyza denudata Spencer

Lonsdale, Owen, 2011, The Liriomyza (Agromyzidae: Schizophora: Diptera) of California 2850, Zootaxa 2850 (1), pp. 1-123 : 43

Liriomyza denudata Spencer

Figs 82–84

Liriomyza denudata Spencer 1981: 226 . Spencer & Steyskal 1986: 120.

Wing length 1.5mm (♂). Female unknown. Length of ultimate section of vein CuA 1 divided by penultimate section: 3.0. Eye height divided by gena height: 3.0. Scutum dusted with pruinosity, with shiny stripe along dorsocentral row in holotype.

Chaetotaxy: One ori, two ors. Acrostichal setulae entirely absent.

Colouration: Calypter margin and hairs grey. Head light yellow with clypeus and ocellar tubercle dark brown, first flagellomere yellow (paratype) or brownish (holotype) with basal margin paler, and ventral margin of gena with faint brownish stripe (becoming darker posteriorly); posterolateral corner of frons brownish to base of outer vertical bristle (sometimes also with thin brownish extensions from eye margin to base of inner vertical and ors). Scutum yellow laterally, with region behind wing base brownish/mottled; katatergite yellow, but slightly brownish on anterior margin; anatergite dark below scutellum and paler lateral to scutellum with posterodorsal corner yellow. Anepimeron largely brown, anepisternum with extensive brown mottling (mostly yellow in posterodorsal corner), ventral 2/3 of meron dark, and ventral ¾ of katepisternum brown (bristle bordering pigment). Legs yellow with tibiae, tarsi, and base of coxae and femora brown; femora also with dorsal mottling at 2/3 length, but pigment only distinct on fore femur, which also has additional dorsal streaking. Abdomen colour unknown.

Genitalia: Figs 82–84 . Surstylus and with single subapical spine. Basiphallus with thick lateromedial ridge. Paraphallus absent. Hypophallus membranous and atrophied. Mesophallus pale, slightly longer than wide and only fused to distiphallus dorsally. Distiphallus approximately as long as mesophallus plus swollen section of ejaculatory duct; bifid with tubules membranous distally and lightly sclerotized basally; basal section with toothed dorsal plate and one pair of small, pale, basally-directed ventral tubules.

Host. Unknown.

Range. USA. California [Alpine].

Type material. Holotype, USA. California: Alpine Co., Hope Valley , 7.viii.1948, sweeping, Lot 19-21, K.E. Frick (1♂, CASC) . Paratype, USA. California: Alpine Co., same collection as holotype (1♂, CASC) .

Comments. Liriomyza denudata is a relatively pale, species without any acrostichal setulae and an unusual phallus — the mesophallus is very pale and the distiphallus is divided between one pair of stout tubules, each with a toothed dorsobasal sclerite and a single thin ventral process.

Figures

FIGURES 82–87. Figs 82–84: Liriomyza denudata Spencer, male genitalia; 82: phallus, lateroventral; 83: left lateral; 84: external components, ventral. Figs 85–87: L. eupatorii (Kaltenbach), male genitalia; 85: ejaculatory apodeme; 86: phallus, ventral; 87: phallus, left lateral.