Quichuana seiferti, 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 : 113-114

QUICHUANA SEIFERTI RICARTE & HANCOCK SP. NOV.

FIGURES 51 , 60 AND 61

Description

Male

Head: Eye hairs brown, lighter and sparser lower down; vertical triangle shiny black, only pollinose on the anterior corner; ocellar triangle with long black hairs; frontal triangle shiny black, only pollinose on the top corner; frontal triangle only with long, anteriorly directed, black hairs; antenna black, slender, elongate, and thinly pollinose; scape conspicuously shorter than pedicel or basoflagellomere; basoflagellomere tapering towards the apex, as long as the pedicel or slightly longer ( Fig. 51 ); bf = 3.8; arista red; profile of the face straight, or nearly so, between the antennae and the mouth edge; facial tubercle very slightly protruding; area just below the antennae black; face extensively shiny black with white pollinosity on the eye margins only (this marginal pollinosity is interrupted for a short distance on the genae, and occurs again on the eye margins); face with long white and black hairs intermixed, except for a central bare stripe between the antennae and the mouth edge.

Thorax: Scutum with two medial pollinose stripes extending slightly beyond the TS; scutum mostly with slightly posteriorly directed black hairs and, on the half of the scutum in front of the TS, scattered white hairs intermixed; PAPT posterodorsally, PP, NP, and AEP only with black hairs (NP and PAPT posterodorsally with higher density of hairs); anterior spiracle dark brown; posterior spiracle light brown; scutellum dark brown, black on the lateral corners; scutellum with long light-yellow and black hairs intermixed; legs extensively black, only red to dark red on the apex of metatibia and on the meso- and metatarsomeres 1–2 dorsally; legs with hairs mostly black, although with light-yellow hairs on the tibiae and tarsi, as well as on small areas of the metafemur basally; anterior margin of the wing conspicuously dark-brown pigmented (pigmented area tapering towards the apex); cells BM and CuP extensively bare of microtrichia; small areas of the cells DM, CuA1, and anal lobe bare of microtrichia; calypteres black.

Abdomen: Shiny black; tergum I with a moustache arrangement of light-yellow hairs; tergum II mostly with short black hairs, but also with scattered short light-yellow hairs intermixed; tergum II with long black hairs on the lateral margins, shorter when more posterior on the margins; terga III–IV with both very short light-yellow and black hairs intermixed; lateral margins of terga III–IV with hairs longer than those on the central plate; sterna mostly with long lightyellow hairs.

Genitalia: Superior lobes round at the apex, sinuous in shape; hypandrium with a conspicuously large hook-like process ( Fig. 60 ); surstyli with round lateral expansions ( Fig. 61 ).

Female

Unknown.

Etymology

The epithet ‘ seiferti ’ refers to Dr Richard P. Seifert, who carried out important entomological studies in the Neotropics.

Material examined ( INBio )

Holotype: 1m, Costa Rica, Prov. Puntarenas, C. Chomogo, Monteverde, 1800 m, 1.ix.1996, leg. MAZ, L_N_256400_448250#8502/CRI002475923 (left proleg missing).

Paratype: COSTA RICA: 1m, Est. La Casona , R. B. Monteverde, Prov. Punta , 1520 m, x–xi.1993, leg. N. Obando L N 253250_449700#2821, CRI001781941.

Range

Costa Rica.

Taxonomic notes

Small species (8.2 mm) with moderately broad abdomen; similar to Q. zoricae sp. nov., but smaller; basoflagellomere very elongate (bf = 3.8) ( Fig. 51 ), longer and more slender than that in Q. zoricae sp. nov. ( Fig. 52 ); in Q. seiferti sp. nov. the profile of the face is straight, or nearly so, between the antennae and the mouth edge, whereas in Q. zoricae sp. nov. the profile is straight between the frontal prominence and the mouth edge; in Q. seiferti sp. nov. the area just below the antennae is black, whereas in Q. zoricae sp. nov. the area is yellow; male genitalia with superior lobes and surstyli different in shape between Q. seiferti sp. nov. ( Figs 60, 61 ) and Q. zoricae sp. nov. ( Figs 70–72 ).

QUICHUANA SIMONETTA HULL, 1946

Figures

Figures 51–55. Quichuana right antennae, lateral inner view: 51, Quichuana seiferti sp. nov., male paratype; 52, Quichuana zoricae sp. nov., female paratype; 53, Quichuana melas, male holotype; 54, Quichuana personata sp. nov., female holotype; 55, Quichuana pogonosa sp. nov., male from type locality. Scale bars: 1 mm (lower bar applies to Fig. 55 only).

Figures 60–61. Quichuana seiferti sp. nov. male holotype genitalia, lateral view: 60, hypandrium; 61, epandrium; le, lateral expansion. Scale bar: 0.5 mm.

Figures 69–72. Quichuana zoricae sp. nov. 69, right wing, dorsal view (densely dotted areas represent areas with dark pigmentation); scale bar = 2 mm. 70–72, male genitalia: 70, hypandrium, lateral view; 71, epandrium, lateral view; 72, left part of epandrium, anterior view; scale bar = 1 mm.