Quichuana invenusta, 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 : 97-98

QUICHUANA INVENUSTA RICARTE SP. NOV.

FIGURES 43 , 45 , AND 46

Description

Male (holotype)

Head: Eye hairs brownish; vertical triangle pollinose on the anterior corner; ocellar triangle with long, anteriorly directed, black hairs; frontal triangle and face extensively shiny black, only narrowly white pollinose on the eye margins; antenna thinly pollinose, black, narrowly red at the very base of the basoflagellomere; basoflagellomere nearly round ( Fig. 43 ); bf = 1.25; face pale haired, except for a central bare stripe extending from the antennae to the mouth edge; occiput with yellow hairs and, on the upper half, long black hairs intermixed; lower half of the occiput pollinose.

Thorax: Black; PP with both black and pale hairs and a faint pollinose marking; scutum thinly grey pollinose, with two faint, medial, white pollinose stripes extending beyond the TS; scutum extensively pale haired, but with black hairs on the area above the wing insertion and between the wings; PC black haired; AA with a few fine yellow hairs ventrally; PAPT posterodorsally with a tuft of long yellow hairs; AEP with black hairs; katepisternum with fine yellow hairs; scutellum with long pale hairs; legs black and extensively black haired, but with pale hairs at least on the metafemur; metafemur slender; calypteres reddish; wings extensively microtrichose and very faintly pigmented in the basal part of the anterior margin.

Abdomen: Black; terga I–IV with pale hairs and, on terga II–IV posteriorly, black hairs; tergum I with a moustache arrangement of sparse light-yellow hairs; lateral margins of terga II–IV with long light-yellow hairs; sterna with long light-yellow hairs centrally.

Genitalia: Superior lobes short and nearly square in lateral view ( Fig. 45 ); epandrium with surstyli round at the apex, slightly expanded anteriorly ( Fig. 46 ).

Female (paratype)

Same as the male except frons with both pale and dark hairs, with some anteriorly directed and some laterally directed; frons with a small white pollinose spot at halfway between the anterior ocellus and the antennae; basoflagellomere nearly square; face dark copper; thorax extensively pale haired, but with a few black hairs on the area above the wings; pleuron and legs copper; legs mostly pale haired, but also with some scattered black hairs on femora and tibiae; terga I–IV with only light-yellow hairs, although short.

Etymology

The epithet ‘ invenusta ’ means ‘bland, without beauty’, and refers to the fact that this species is undistinguished.

Material examined (USNM)

Holotype: 1m, Alt. 2000 m, Alto Itatiaia, R. Janeiro (handwritten)/ Marco 1941, R. C. Shannon & L. Gomes (handwritten)/ USNM ENT 00036206 .

Paratypes: BRAZIL: 1m (tip of the abdomen and genitalia in poor condition) and 1f, Alt . 2000 m, Alto Itatiaia, R. Janeiro (handwritten), Marco 1941, R. C. Shannon & L. Gomes (handwritten), USNM ENT 00036207 (1m) and 00036298 (1f), Quichuana 16-7, det. FCT 19 (species name handwritten) .

Range

Brazil.

Taxonomic notes

Small species (9.4 mm) with moderately broad abdomen; the only similar species is Q. parisii , which can be readily separated from Q. invenusta sp. nov. by the colour of the anterior half of the wing, characteristically yellow pigmented on the basal half and darkbrown pigmented on the apical half in Q. parisii ( Fig. 82 ), but hyaline in Q. invenusta sp. nov.; additionally, Q. invenusta sp. nov. has the facial tubercle very low, almost flattened, and Q. parisii has a typically protruding tubercle.

QUICHUANA KNABI SHANNON, 1927

Figures

Figures 43–44. Quichuana right antennae, lateral inner view: 43, Quichuana invenusta sp. nov. male paratype; 44, Quichuana parisii female. Scale bar: 1 mm.

Figures 45–46. Quichuana invenusta sp. nov. male genitalia, lateral view: 45, hypandrium; 46, epandrium. Scale bar: 1 mm.

Figures 80–83. Overall appearance of different Quichuana species, dorsal view. 80, Quichuana cincta, female from Mexico; scale bar = 2 mm. 81, Quichuana inca, male holotype; scale bar = 1 mm. 82, Quichuana parisii, female paralectotype, scale bar = 1 mm. 83, Quichuana undulatipila sp. nov., female paratype; scale bar = 2 mm.