Quichuana quixotea, HULL, 1946: 14

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 : 109-110

QUICHUANA QUIXOTEA HULL, 1946: 14

Hull (1946) characterized briefly both the male and female of Q. quixotea by giving an account of the main contrasting characters in relation to the similar Q. auratus (syn. nov. of Q. angustiventris ). Males and females of Q. quixotea are keyed in Hull (1946), but with no published designation of a holotype. However, we have examined a male that is red-labelled as the holotype, which is deposited in CNC. The handwriting on the red label of this specimen appears to be that of Hull, in comparison with other positively identified Quichuana labels written by Hull (F.C. Thompson and J. Skevington pers. comm.). This holotype specimen is diagnosed here.

Diagnostic features

Male (holotype)

Body hairs mostly golden yellow; frontal triangle with adpressed, long, yellow hairs densely grouped, but not obscuring the background colour of the triangle; bf = 2.2; face white pollinose, with golden yellow hairs, except for the central, shiny stripe; occiput with golden yellow hairs only; PP pollinose; scutum with two medial, white pollinose stripes, extending threequarters the length of the scutum; scutum with a lateral, pollinose stripe anterior to the TS and other similar stripe posterior to it (these lateral stripes and the pollinose marking on the PP are more inconspicuous than the medial stripes of the scutum); PAPT posterodorsally, NP, and PC with tufts of golden yellow hairs; legs mostly golden yellow haired; protibia light red, slightly darkened on the apical half; protarsus light red, slightly darkened dorsally; mesotibia and tarsi light red; metatibia and tarsi blackish red; wings extensively microtrichose and very weakly brown pigmented anteriorly; terga mainly with golden yellow hairs; tergum I with a moustache arrangement of golden yellow hairs; tergum III with a few black hairs posteriorly; tergum IV with a semicircular band of black hairs on the posterior quarter; sterna with long, pale hairs, except for scattered black hairs on sternum IV posteriorly; based on Costa Rican males, genitalia virtually the same as that of Q. angustiventris .

Material examined

Holotype: 1m, Muzo Dept. Boyaca alt. 900 m / Quichuana quixote Hull, H (handwritten)/ Colombia 1936/ J. Bequaert Collector / Holotype quixote Hull (handwritten on red label)/ Syntype, Quichuana quixotea Hull, CNC no. 20629 (species name and number handwritten) ( CNC) .

Additional material: COSTA RICA: 1m, Est. Sirena , 0–100 m, P.N. Corcovado, Prov. Puntarenas, 9–27.vii. 1992, leg. A. Gutiérrez, L S 270500, 508300, det. as Quichuana angustiventris 16.i.1997 ( CRI000887798 ) ; 2m, Prov. Puntarenas, Golfito, P.N. Corcovado, S. Los Patos, R . Rincón. S. Patos , 200 m, 11–24.i.1999, leg. M. Lobo, by hand net, L S 278700 561700#53871 ( INB0003044698 and 0003044709) ( INBio) .

Range

Colombia, Costa Rica.

Taxonomic notes

Medium size species (10.7 mm) with slender abdomen; the main character to separate males of Q. quixotea from males of the similar Q. angustiventris is that the adpressed, golden yellow hairs on the frontal triangle in Q. quixotea are not dense enough to obscure the background colour of the triangle; to separate males of Q. quixotea from the similar Q. dolorosa , see ‘Taxonomic notes’ under the latter species.

At INBio there are some females that we recorded as Q. quixotea because they share collection data with the male we examined, but we found no reliable way to distinguish them from females of Q. angustiventris . Thus, females of Q. quixotea could be confused with Q. angustiventris in the key presented here. Based on all the material we examined, Q. angustiventris appears to be much more frequently recorded than Q. quixotea .

QUICHUANA RIESELI SHANNON, 1927