Quichuana mariliae, 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 : 99-101

QUICHUANA MARILIAE RICARTE & HANCOCK SP. NOV.

FIGURES 47–50

Description

Male

Head: Upper quarter of eyes with dense, brownish white hairs; occasional white hairs at the middle of the eyes; lower margin of eyes with sparse, straight, short black hairs dorsally; metatrochanter with a conspicuous process bearing apically a row of black setae ( Fig. 50 ); metatibia inflated towards the apex, constricted ventrally and with an apical, short process bearing black, adpressed hairs ( Fig. 49 ); metafemur with long yellow hairs, longer on anterior surface; a few short, spiny, black setae on ventral third of femora; metatarsus yellow, with black setae dorsally; wings extensively microtrichose, with small, bare areas in cells bc, C, and CuP; wings with light-brown pigmentation in cells SC and R 1, and in cells R 2+3 and R anteriorly; ventral calypteres white centrally, but black with short, black hairs in the margin; halteres whitish yellow apically, brown on the basal third.

white hairs; vertical triangle with long, black hairs; a row of long, golden yellow hairs just posterior to the ocellar triangle; frontal triangle black, with long, anteriorly directed, golden yellow hairs laterally and scattered, long, black hairs centrally; antenna elongate, basoflagellomere 1.3 ¥ longer than pedicel and pedicel 2.7 ¥ longer than scape; ventral surface of frontal prominence yellowish laterally; face black, with lateral, white pollinosity delimiting a central, rhomboidal, shiny area; long, bright-yellowish white hairs on both the pollinose and shiny surfaces of face, except for a median, narrow, bare stripe; occiput with long, golden yellow hairs, shorter and paler when further down the occiput (upper section of occiput with a row of black setae intermixed with yellow hairs); from the midpoint of the occiput to the lower end, hairs progressively longer and sparser.

Thorax: Scutum with two grey pollinose stripes, nearly reaching the posterior margin of scutum; scutum with golden yellow hairs as long as those on scutellum; NP, PAPT posterodorsally, and PC with a tuft of golden yellow hairs; scutellum brownish black, with long, golden yellow hairs; proleg red, except for the black coxa and trochanter; profemur narrowly yellow apically; meso- and metaleg red, except for the black coxa, trochanter, and basal two-thirds of the femur; pro- and mesofemur and tibia with long, yellow hairs posteriorly; tibiae with black hairs dorsoapically (in mesoleg also ventro-apically); tarsi with Abdomen: All terga dull, bronzy black, except for shiny surface of terga I and II anteriorly; tergum I with a moustache arrangement of long, golden yellow hairs; tergum II only with yellow hairs, very long on the anterior section of lateral margins; tergum III only with golden yellow hairs; tergum IV with golden yellow hairs and scattered black hairs posteriorly; tergum V with both whitish yellow hairs and scattered black hairs; sternum I with long white hairs; sterna II and III with long yellowish white hairs; sternum IV with very few lateral hairs, both pale and black intermixed.

Genitalia: Superior lobes short and more or less conical; secondary processes of hypandrium developed with respect to those in the genitalia of species such as Q. angustiventris ; surstyli slender, narrowed at the base, but widening towards the apex; base of the surstyli with a tooth in the interior side.

Female

Same as male except upper fourth of eyes with sparse hairs; basoflagellomere 1.6 ¥ longer than pedicel, and pedicel 2.1 ¥ longer than scape (N = 4) ( Fig. 47 ); ocellar triangle with black hairs; frons shiny black; anterior part of the frons with long, anteriorly directed, golden yellow hairs, and posterior part with long, posteriorly directed, golden yellow hairs; frons with an anteriorly directed chevron of pollinosity; scutum with two strong grey pollinose stripes reaching the posterior margin ( Fig. 48 ); scutum with hairs shorter than those on scutellum; metatrochanter and metatibia without processes or constrictions; dorsoapical third of protibia darkened; basal half of mesofemur sometimes black; metafemur with long, white to yellow hairs, longer ventrally; metatibia with short, black hairs intermixed with yellow hairs; wing membrane weakly pigmented in cells bc and C, sometimes nearly hyaline; tergum II usually with scattered black, adpressed hairs posteriorly; posterior quarter of tergum III usually with black, adpressed hairs; tergum V with only whitish yellow hairs; shiny surface of tergum II smaller than that in male; sterna I–III with long white hairs centrally; sternum IV with yellowish-white hairs all over.

Etymology

The epithet ‘ mariliae ’ refers to ‘Marili’, the nickname for Dr M. Ángeles Marcos-García. This species is named for her because she collected some material and, in addition, encouraged me to undertake this revision (A Ricarte).

Material examined

Holotype: 1m, Costa Rica, Prov. Guanacaste, Rincón de la Vieja, Upala, Dos Ríos , San Cristóbal, 600– 620 m, 17.v.1998, leg. F.A. Quesada, en flor, L_N_ 318056383200#63528/INB0003341160 ( INBio).

Paratypes: COSTA RICA: 1m with puparium, Las Flores, Alajuela, Upala , 2.ii.2008 (puparium 21.ii.2008, adult 2.iv.2008), ex liquid contained in a live bromeliad, leg. MAM ( CR170 ) ; 1m with puparium, El Pilón, 700 m, ex bromeliad, larva 21.vi.09, puparium 17.vii.09, adult 25.vii.2009, leg. MAM (ref. 718) , CEUA00089988 ; 2m with puparia, Guatuso, Finca Blanco , ex bromeliad, larva 17.vi.09, puparium 2.vii.2009 (1m) & 7.vii.2009 (1m), adult 2.vii.2009, leg. MAM (ref. 717 and 719) , CEUA00089987 and 89989; 1m, Albergue Heliconias, Volcán Tenorio , 2.ii.2008, leg. MAM , collected with a light trap, CR181, CEUA00089984 ( CEUA); 4f with puparia, Las Flores, Alajuela, Upala , ex live bromeliads, larva 2.ii.2008, puparium 13.ii.2008, adult 27.ii.2008 (CR172); puparium 14.ii.2008, adult 1.iv.2008 (CR168); puparium date not recorded, adult 14.iv.2008 (CR174) (for CR172 breeding site unknown), leg. MAM ; 1f, Las Flores, Alajuela, Upala , ex bromeliad, larva 2.ii.2008, adult 1.iii.2008, leg. MAM ( CR162 ) ( CEUA); 1f, Prov. Alajuela, P.N. Volcán Tenorio, Sector El Pilón , 700–800 m, 29–31.vii.2003, L N 298212 427913#74561, leg. J. Azofeifa with light trap ( INB0003743854 ) ( INBio); 1f, Est. Pitilla , 700 m, 9 km S, Sta. Cecilia, P.N. Guanacaste, Prov. Guanacaste, 1 to 11.ix.1992, L-N 330200, leg. C. Moraga ( INBio CRI 000849090) ( INBio) .

Range

Costa Rica.

Taxonomic notes

Medium size species (10.2 mm, holotype) with slender abdomen; males of this species can be readily separated from males of any other species by the presence of a conspicuous process on the metatrochanter ( Fig. 50 ), as well as by having the apical section of the metatibia inflated and then constricted ventrally, to end with a short but conspicuous process ( Fig. 49 ); the long pedicel and basoflagellomere (bf = 2.3, holotype; for female, see Fig. 47 ) separate this species from similar species such as Q. angustiventris , Q. picadoi , or Q. quixotea , but females of Q. mariliae sp. nov. are readily distinguishable amongst females of species with a slender abdomen by the presence of two strong pollinose stripes reaching the posterior margin of the scutum ( Fig. 48 ).

Figures

Figures 47–50. Quichuana mariliae sp. nov. 47, female, right antenna, lateral inner view; 48, female, thorax, dorsal view; 49, male, apical half of femur, tibia, and basotarsomere of the left metaleg; 50, male, left metatrochanter. Scale bars: 0.5 mm (Figure 47); 1 mm (Figures 48–50).