Quichuana hulli, 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 : 94

QUICHUANA HULLI RICARTE & MARCOS- GARCÍA SP. NOV.

Description

Female (holotype)

Head: Eye hairs slightly lighter on the lower half of the eye; ocellar triangle with black hairs; frons with sparse brownish pollinosity; frons with black and golden yellow hairs intermixed dorsally, and black hairs ventrally and on the dorsal area of the frontal prominence; eye margins with golden yellow hairs; antenna dark red, especially darkened on the scape and the base of the pedicel; ventral area of the frontal prominence brownish, with whitish pollinosity; face black, with long golden yellow hairs, except for a central, bare, shiny stripe from the bottom of the frontal prominence to the mouth edge; gena with a stripe of white pollinosity from the mouth edge to the eye margin; occiput wholly pollinose and with long golden yellow hairs, and, on the upper third, a line of long black hairs.

Thorax: Black; scutum with two medial brownish pollinose stripes reaching the posterior margin of the scutum; scutum yellow haired, except black haired behind the TS and on the area above the wings; NP, PAPT, and PC with tufts of golden yellow hairs; scutellum dark brown, black on lateral corners; anterior half of the scutellum black haired centrally and posterior half yellow haired; all femora extensively black; apical half of the pro- and mesofemur red anteriorly; apical half of the protibia with blackish markings, the remaining area red; mesotibia red; apical two-thirds of the metatibia blackish, the remaining area red; tarsi red, except for the darkened dorsal area of metatarsomeres 4–5; femora, tibiae, and tarsi mostly with golden yellow hairs, but at least with scattered black hairs or setae; wings wholly microtrichose and brown pigmented on the anterior half.

Abdomen: Black, without conspicuous pale markings; most of the surface of terga II–V covered with sparse brownish pollinosity; tergum I with a moustache arrangement of golden yellow hairs, with a central gap of about a third of the tergum length; posterior margin of terga II–IV laterally fringed with adpressed golden yellow hairs; posterior half of terga II–IV with a medial nearly circular patch of black hairs; lateral margins of the posterior half of tergum II also with scattered black hairs; tergum V mainly black haired.

Male

Unknown.

Etymology

The epithet ‘ hulli ’ refers to Dr Frank M. Hull, the entomologist who published the only monograph of the genus Quichuana prior to the present study.

Material examined

Holotype: f, Costa Rica, Tausito Jiménez , Cartago, ex bromealiad, larva 21.vii.2007, puparium 1.ix.2007, date of adult emergence unrecorded, leg. MAM ( CR186 ) (basoflagellomores and the left proleg missing) ( CEUA).

Range

Costa Rica.

Taxonomic notes

Medium size species (10.7 mm) with broad abdomen. Quichuana hulli sp. nov. can be separated from other species by the following unique combination of characters: face with golden yellow hairs; antenna dark red; scutum with two medial pollinose stripes reaching the posterior margin of the scutum; PAPT posterodorsally, NP, and PC with tufts of golden yellow hairs; femora extensively black and tibiae extensively red; metatarsus darkened on tarsomeres 4–5 dorsally; wing wholly microtrichose; width of the gap between the two groups of laterally directed hairs on tergum I more than a quarter of the tergum width; terga extensively black and covered with sparse brownish pollinosity; posterior margin of terga II–IV laterally fringed with adpressed golden yellow hairs.