Quichuana bezzii, CERESA, 1934: 387

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 : 80-81

QUICHUANA BEZZII CERESA, 1934: 387

FIGURES 21 , 23 AND 24

Three males and six females were examined by Ceresa (1934), three males and five females of which comprise the type series. These eight specimens are deposited in MCSN. Each specimen of the type series is red-labelled as ‘cotypus’ with the letters ‘co’ crossed out. We designate a lectotype and seven paralectotypes to stabilize the name (see ‘Material examined’) .

Diagnostic features

Body extensively black; frontal triangle flat; bf = 1.3 (lectotype); basoflagellomere oval ( Fig. 21 ); face extensively white pollinose, except for a central, short, shiny, black stripe comprising the facial tubercle; facial lateral stripes, when visible, with sparser pollinosity than that on the rest of the face; thorax without tufts of hairs, although longer hairs at NP, PAPT, and PC; scutum with PP pollinose and two medial, white pollinose stripes extending on the anterior three-quarters of the scutum, and diverging posteriorly; pro- and mesotibia red at least on the basal half; metafemur from copper red on the apical third to wholly copper red; metatibia copper red; wings extensively microtrichose, except for small bare areas in cells BM, CuP, basal area of C, and alula; terga black; tergum I only with short pale hairs; hairs on the lateral margins of terga I– II pale, relatively short, and wavy only towards the tip; male genitalia with superior lobes conical towards the apex ( Fig. 23 ); hypandrium with lateral extensions on the apical half ( Fig. 23 ); surstyli concave antero-apically, but rounded postero-apically ( Fig. 24 ) .

Material examined (MCSN)

Lectotype: 1m, Brasil, Est. Saõ Paulo, S. Sebastiaõ, A.A. Barbiellini /cotypus.

Paralectotypes: Brasil, Est. Saõ Paulo, S. Sebastiaõ: 1m, A.A. Barbiellini, 11–1906 (handwritten), cotypus; 1m, A.A. Barbiellini, 491, cotypus; 1f, A.A. Barbiellini, 11–1906 (handwritten), cotypus; 2f, A.A. Barbiellini, 4–1917 (handwritten), cotypus; 1f, A.A. Barbiellini, 11–1906 (handwritten), 805 (handwritten), cotypus, Quichuana bezzii Cer. , det. L. Ceresa (species name handwritten); 1f , Brasil, Est. S. Paulõ, S. Sebastiaõ, A.A. Barbiellini (most of the abdomen lacking). On the ‘cotypus’ label of all the specimens, ‘co’ is crossed out in ink .

Range

Argentina, Brazil.

Taxonomic notes

Medium size species (10.7 mm, lectotype) with slender abdomen; Q. bezzii can be separated from the similar Q. undulatipila sp. nov. by the surface of the frontal triangle, which is flat in the former but domed in the latter; additionally, the hairs on the lateral margins of terga I–II are shorter and not so conspicuously wavy (wavy for a shorter length) than those in terga I–II of Q. undulatipila sp. nov.; the shape of the superior lobes and surstyli in the male genitalia also differ between Q. bezzii ( Figs 23, 24 ) and Q. undulatipila sp. nov. ( Figs 65, 66 ).

Figures

Figures 20–22. Quichuana right antennae, lateral inner view: 20, Quichuana pulverifacies sp. nov., female holotype; 21, Quichuana bezzii, male lectotype; 22, Quichuana undulatipila sp. nov., male holotype. Scale bars: 1 mm (top scale bar applies to Fig. 20 only).

Figures 23–24. Quichuana bezzii male lectotype genitalia: 23, hypandrium, lateral view; 24, epandrium, lateral view. Scale bar: 1 mm.

Figures 65–66. Quichuana undulatipila sp. nov. male genitalia, lateral view: 65, hypandrium; 66, epandrium. Scale bar: 1 mm.