Quichuana amazonica, 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 : 74

QUICHUANA AMAZONICA RICARTE & HANCOCK SP. NOV.

FIGURES 1 , 3 AND 4

Description

Male

Head: Vertical triangle black, only pollinose in front of the anterior ocellus; ocellar triangle with long, anteriorly directed, black hairs; frontal triangle black, with long, anteriorly directed, golden yellow hairs and scattered black ones medially; antenna thinly pollinose and reddish; basoflagellomere kidney shaped ( Fig. 1 ); bf = 1.7; face extensively white pollinose, with a central shiny black stripe not reaching the antennae; face with pale hairs except for the central stripe; lower half of the occiput with white pollinosity; occiput only with golden yellow hairs.

Thorax: Scutum black with golden yellow hairs; golden yellow hairs also present on the pleuron, forming tufts on the NP and posterodorsal area of the PAPT; hairs on the PC longer than the ones on the scutum; scutellum with pale hairs; scutellum black anteriorly and dark-brown posteriorly; legs uniformly light red, except femora darker red; legs mainly with golden yellow hairs, except fine, adpressed, black hairs on the apical quarter of metafemora dorsally, and scattered black hairs on the metatibia ventrally; wings extensively microtrichose.

Abdomen: Black terga, mainly with golden yellow hairs; tergum I apparently lacking a conspicuous, moustache arrangement of hairs; hairs longer on the lateral margins than on the centre of terga; the longest hairs of the terga occurring on the anterior corner of tergum II, as in other species; sterna with pale hairs centrally.

Genitalia: Superior lobes gently serrate anteriorly, excavated apically and slightly curved backwards ( Fig. 3 ); epandrium with surstyli expanded anteriorly at mid height ( Fig. 4 ).

Female

Unknown.

Etymology

The epithet ‘ amazonica ’ refers to the Peruvian locality where the holotype was collected, the Upper Amazon .

Material examined

Holotype: 1m, Upper Amazon , Peru, J. J. Mounsey / Yahuas Terr, 16.vii–12.viii.1913 (handwritten)/ C.J. Wainwright Collection, B.M. 1948–488 ( NHM).

Range

Peru.

Taxonomic notes

The following combination of characters is unique to this species, and makes it easily recognizable: small species (7.7 mm) with slender abdomen; body hairs predominantly golden yellow (no black hairs on occiput, nor above the wings); bf = 1.7; basoflagellomere kidney shaped ( Fig. 1 ); wing membrane hyaline, not pigmented, but wholly microtrichose; male genitalia as in Figures 3 and 4 , with the superior lobes gently serrate on the outer side and with a depression apically.

QUICHUANA ANGUSTIVENTRIS ( MACQUART, 1855)

Figures

Figures 1–2. Quichuana right antennae, lateral inner view: 1, Quichuana amazonica sp. nov., male holotype; 2, Quichuana longicauda sp. nov., female paratype; l, distance from top of basoflagellomere and most prominent point of pedicel; w, width of basoflagellomere at the level of the arista base. Scale bar: 1 mm.

Figures 3–4. Quichuana amazonica sp. nov. male holotype genitalia, lateral view: 3, hypandrium; 4, epandrium; ce, cercus; sl, superior lobe; sur, surstylus. Scale bar: 1 mm.