Quichuana bromeliarum, 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 : 84-85

QUICHUANA BROMELIARUM RICARTE & MARCOS- GARCÍA SP. NOV.

FIGURES 25–27

Description

Male (holotype)

Head: Eye hairs straight and brown, slightly lighter on the lower half of the eye and denser towards the upper half; vertical triangle black with white pollinosity on the anterior corner and, on the ocellar triangle, long black hairs; frontal triangle black with long black hairs and, on the eye margins, a line of pale hairs; antenna pale; basoflagellomere oval and darker than scape and pedicel; bf = 1.2; scape and pedicel with black hairs; ventral area of the frontal prominence red, with sparse pollinosity; black face, with long white hairs except for a bare, central, shiny stripe from the mouth edge to the bottom of the frontal prominence; facial pollinosity white, and restricted to a narrow line at the eye margin and a stripe extending from the eye margin to the mouth edge; occiput white pollinose, with long white hairs and, on the upper third, a line of long black hairs.

Thorax: Black; scutum with two medial, approximated, brownish pollinose stripes extending on the anterior four-fifths of the scutum; scutum with both yellow and black hairs intermixed; black hairs denser on the half of the scutum behind TS and also occurring on the anterior area of the PC and above the wings; PAPT posterodorsally, NP and PC with tufts of golden yellow hairs; brown scutellum, blackish on the lateral corners; scutellum with yellow hairs and, centrally, scattered black hairs intermixed; basal half of the pro- and mesofemur black; basal three-quarters of the metafemur black; pro- and mesotibia red; metatibia black on about the central third; all tarsi red except for the metatarsomeres 4–5 dorsally; femora and tibiae with both pale and black hairs; protarsomeres 3–5, mesotarsomeres 2–5, and metatarsus with black hairs dorsally; anterior third of the wing faintly brown pigmented; wing extensively microtrichose, except for some areas with lower density of microtrichia on cells R and CuA1.

Abdomen: Terga II–III each with two lateral red spots, which cover less than half of the surface of each tergum, including the full-length of the lateral margins of tergum II; tergum IV with two very faint, small, pale spots; terga II–IV black pollinose, except for a narrow, shiny, posterior band, slightly larger in tergum IV; 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 yellow haired, except for the posterior margin, which has a band of black hairs on the posterior half of the tergum or less; posterior margin of terga II–III laterally fringed with adpressed yellow hairs ( Fig. 77 ).

Genitalia: Hypandrium with sickle-shaped superior lobes ( Fig. 25 ); surstyli tapering towards the apex, round apically ( Fig. 26 ), and with a round expansion on the inner side ( Fig. 27 ).

Female

Same as the male except frons and dorsal surface of the frontal prominence brownish pollinose, with both pale and dark hairs intermixed, and, on the eye margins, a line of yellowish hairs; black face with long yellowish hairs except for a bare, central, shiny stripe from the mouth edge to the base of the frontal prominence; scutum yellow haired in front of the TS; metatibia black on about the central third; metatarsomeres 4–5 red but slightly darkened dorsally; all femora, pro- and metatibia with at least a few black hairs; mesotibia pale haired, only with a few short blackish hairs apically; tarsomeres 3–5 of all legs with at least a black hair dorsally; wing extensively microtrichose, with lower density of microtrichia on small areas of cells CuA1, CuP, and anal lobe; shiny band on the posterior margin of terga II–IV smaller than that on the male; tergum IV mainly black haired, but with yellow hairs on the anterolateral areas and lateral margins; terga II–III red on the full length of the lateral margins; posterior margin of tergum IV fringed with adpressed black hairs.

Etymology

The epithet ‘ bromeliarum ’ means ‘from bromeliads’ and refers to the breeding site in which larvae of this species were found.

Material examined (CEUA)

Holotype: 1m, Venezuela, Edo Miranda, San Antonio de los Altos , IVIC, 650 m, puparium 21.ii.07, adult 5.iii.07, leg. CPB. The right proleg and the left metatibia and metatarsus are pasted on a label attached to the pin.

Paratypes: VENEZUELA: 1m, Edo. Aragua, P.N. Henri Pittier, Estación Biológica Rancho Grande , 1183 m, puparium 2.ii.07, adult 16.ii.07, leg. CPB; 2f, Distrito Federal, Monumento Natural Pico Codazzi , 2260 m, puparium 12.ii.07 & adult 2.iii.07, and puparium 26.ii.07 & adult 12.iii.07, leg. CPB; 1f, Tinabequi, Edo. Aragua, N10° 23944 W067° 12980, 2246 m, puparium 12.ii.07, adult 26-2-07, leg. CPB (abdomen detached and pasted on a label attached to the pin) .

Range

Venezuela.

Taxonomic notes

Medium size species (10.8 mm, holotype) with moderately broad abdomen; Q. bromeliarum sp. nov. can be separated from the similar Q. dissimilis sp. nov. by the colour of the basoflagellomere, which is black in the former species and reddish in the latter; in Q. bromeliarum sp. nov. the two medial pollinose stripes on the scutum do not reach the posterior margin, but in Q. dissimilis sp. nov. they do, although faintly; the hypandrium of both species is similar but the surstyli differ in shape, being slender and tapered in Q. bromeliarum sp. nov. ( Fig. 26 ), with a rounded inner expansion ( Fig. 27 ), and broader medially in Q. dissimilis sp. nov. ( Fig. 38 ), with a pointed inner expansion ( Fig. 39 ).

QUICHUANA CALATHEA SHANNON, 1925

Figures

Figures 25–27. Quichuana bromeliarum sp. nov. male genitalia: 25, hypandrium, lateral view; 26, epandrium, lateral view; 27, left surstylus, anterior view. Scale bar: 1 mm.

Figures 73–79. Features of the ‘slender’ and ‘robust’ species of Quichuana. 73–76, ‘slender’ species. 73, Quichuana angustiventris, male from Trinidad with attached puparium, overall appearance, dorsal view; scale bar = 2 mm. 74, Quichuana calathea, male from Costa Rica, eye contiguity and vertical triangle; scale bar = 0.5 mm. 75–76, Quichuana picadoi, male: 75, anterior view; 76, lateral view; scale bar = 1 mm. 77–79, ‘robust’ species. 77, Quichuana fasciata, female lectotype, overall appearance, dorsal view; scale bar = 2 mm. 78, Quichuana dissimilis sp. nov., male holotype, eye contiguity and vertical triangle; scale bar = 1 mm. 79, Quichuana atra sp. nov., female, anterior view; scale bar = 1 mm.

Figures 38–39. Quichuana dissimilis sp. nov. male holotype genitalia: 38, epandrium, lateral view; 39, left half of epandrium, anterior view. Scale bar: 1 mm.