Quichuana salvadorensis, Ricarte & Marcos-García & Hancock & Rotheray, 2012

Ricarte, Antonio, Marcos-García, M. Ángeles, Hancock, E. G. & Rotheray, Graham E., 2012, Revision of the New World genus Quichuana Knab, 1913 (Diptera: Syrphidae), including descriptions of 24 new species, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 166 (1), pp. 72-131 : 111-112

QUICHUANA SALVADORENSIS RICARTE SP. NOV.

FIGURES 58 AND 59

Description

Male

Head: Eye hairs straight, not curved apically, and brown, but lighter and sparser lower down; vertical triangle black, only pollinose in front of the anterior ocellus; ocellar triangle with long black hairs; frontal triangle black, with long black hairs and, at the eye margins, pale hairs; antenna dark; basoflagellomere oval, brownish centrally; bf = 1.2; ventral part of the frontal prominence brownish, with sparse pollinosity and with a tapering pollinose stripe extending from the eye margin to the antennae; black face, with long golden yellow hairs, except for a central, bare, shiny stripe extending from the bottom of the frontal prominence to the mouth edge; lower part of face with a white pollinose stripe extending from the eye margin to the mouth edge laterally; occiput white pollinose, with long hairs mostly golden yellow but, on the upper third of occiput, with a line of intermixed black hairs.

Thorax: Black; scutum with two medial, grey pollinose stripes extending for about the anterior threequarters of the scutum; scutum mainly with golden yellow hairs, but scattered black hairs on the surface of the scutum posterior to TS; PAPT posterodorsally, NP, and PC with tufts of golden yellow hairs; darkbrown scutellum, black on lateral corners; scutellum with intermixed long pale hairs and scattered shorter black hairs; profemur black on the basal half, but black colour extending into the apical half on the posterior face of femora only; pro- and mesotibia and tarsi red; mesofemur black on the basal half; metafemur black on the basal two-thirds; metatibia darkened on the apical half; metatarsus red; all femora, tibiae, and tarsi with both pale and black hairs, but pro- and mesotarsus only with a few scattered black hairs; wings extensively microtrichose; wings lightbrown pigmented on about the anterior third (cell R 2+3 very lightly pigmented).

Abdomen: Terga II–IV each with two lateral red markings covering the full length of the lateral margins of terga II and III (on tergum IV red markings are reduced to faint narrow bands on the anterior margin); tergum I with a moustache arrangement of golden yellow hairs with a central gap of about a third of the tergum width; terga II–IV with pale hairs except for the posterior margin, which has a band of black hairs of, at least, half of the tergum length.

Genitalia: Superior lobes about twice longer than wide, with an outwards-pointing process anteriorly ( Fig. 58 ); surstyli, viewed in profile, with an anterior triangular expansion and two posterior excavations; surstyli with scattered long hairs posteriorly and apically ( Fig. 59 ).

Female

Unknown.

Etymology

The epithet ‘ salvadorensis ’ means ‘Salvadoran’, and refers to the country of the type locality, El Salvador .

Material examined

Holotype: 1m, 4.24.78, Monte Cristo , El Salvador, CA, d. r. barger (handwritten)/ USNM ENT 00036213 ( USNM).

Range

El Salvador.

Taxonomic notes

Large species (13 mm) with broad abdomen; it can be separated from all other species by the unique shape of the superior lobes, and also by the unique size and shape of the surstyli ( Figs 58, 59 ). For other characters separating Q. salvadorensis from the similar Q. argentea , see ‘Taxonomic notes’ under this species.

Figures

Figures 58–59. Quichuana salvadorensis sp. nov. male holotype genitalia, lateral view: 58, hypandrium; 59, epandrium. Scale bar: 1 mm.