Hypselosyrphus pingo, Reemer, Menno, 2013

Reemer, Menno, 2013, Taxonomic exploration of Neotropical Microdontinae (Diptera: Syrphidae) mimicking stingless bees, Zootaxa 3697 (1), pp. 1-88 : 32-34

Hypselosyrphus pingo spec. nov.

Figs 83–89 , 111 .

Studied type specimens. HOLOTYPE. BRAZIL. Female. Label 1: " Brasilien / Nova Teutonia / 27°11'B. 52°23'L / Fritz Plaumann / I 1971 / 300. 500 m "; label 2 (red): " HOLOTYPE / Hypselosyrphus pingo / Reemer". Coll. ZMAN.

PARATYPES: BRAZIL: 1 male [head missing], Nova Teutonia, 27°11'B. 52°23'L, XI.1968, leg. F. Plaumann, coll. RMNH; 1 female, Nova Teutonia, 27°11'B. 52°23'L, 20.II.1937, leg. F. Plaumann, coll. CNC; 1 female, Nova Teutonia, 27°11'B. 52°23'L, I.1968, leg. F. Plaumann, coll. USNM.

Redescription (based on holotype)

Adult female Body size: 10 mm.

Head. Face occupying 1/4 of head width in frontal view; black; entirely white pilose. Gena hardly developed. Oral cavity directly bordering eye margins; with lateral margins not produced. Frons black; sparsely black pilose medially, white pilose along lateral margins. Vertex convexly produced, shining black; black pilose; ocellar triangle not elevated compared to rest of vertex. Occiput black; very narrow, barely visible in lateral view; dorsally black pilose, except for small patch of yellowish white pile next to vertex; ventrally white pilose. Eye entirely with short, pale pile, a little longer than ommati diameter. Antennal fossa a little higher than wide. Antenna black, except basoflagellomere blackish brown; antennal ratio approximately as 5:1:2.

Thorax. Scutum, postpronotum and postalar callus pale brown; densely yellowish brown pilose. Scutellum trapezoid, with posterior margin apicomedially slightly sulcate; pale brown; yellowish brown pilose. Anepisternum convex, without sulcus; dark brown; anterior part yellow pilose, posterior part black pilose. Anepimeron entirely yellow pilose. Katepisternum dark brown; yellow pilose dorsally; bare ventrally. Katatergum long black microtrichose. Anatergum short microtrichose. Other pleurae bare. Calypter and halter yellowish.

Wing: with dark brown fascia halfway wing, as wide as 1/5 of length of wing, and equally wide dark brown fascia at apex, with yellow fascia in between and also yellow between wing base and first brown fascia; colours most clear on anterior half, fading posteriorly. Microtrichose, except bare on 1st costal cell, basal 1/4 of cell br, basal 1/10 of cell bm.

Legs: Yellow; yellow pilose, except black pilose on basal 1/3 of hind femur.

Abdomen. More or less oval, but apical segments narrower than basal ones; a little wider than thorax, widest at posterior 1/4 of tergite 2. Tergite 1 yellowish brown. Tergite 2 yellowish brown with narrow dark brown median line and narrowly dark brown posterior margin. Tergite 3 dark brown, tergites 4 and 5 blackish. Tergites entirely yellow pilose. Basal sternites pale brown, apical sternites darker; yellow pilose.

Male. In the only known male specimen the head is lost. Otherwise, this specimen agrees with the female, except in that all tergites are yellowish brown, except for three black vittae on tergite 4. Genitalia as in fig. 111. Etymology. The Latin verb pingo means to colour or to paint. The name refers to the painted wings of the species. As a species name it is to be treated as a noun in apposition.

Diagnosis. The wing marks and the unwidened hind-tibiae of this species immediately distinguish it from other known Hypselosyrphus -species, except H. vexillipennis . From that species it differs by the completely yellowish brown pilose scutum and scutellum (black pilose in H. vexillipennis ).

Notes. The colouration of the tergites seems to be sexually dimorphic: mostly yellow with three black vittae on tergite 4 in the male, mostly dark on tergites 3 and 4 in female. In two of the paratypes, the median dark fascia on the wing extends to the wing base, so the wing is dark brown on the basal 3/5 of the wing. In this species the hind tibiae are not widened or corbiculate, unlike in other species of Hypselosyrphus (except H. vexillipennis ) and Stipomorpha. It is a matter of taste whether this species should be considered as a mimic of stingless bees or not. Nevertherless, it posesses all characters described as diagnostic for Hypselosyrphus .

Distribution. Only known from Brazil (Nova Teutonia).

Figures

FIGURES 76 – 84. 76 – 80. Hypselosyrphus maurus male (holotype). 76. habitus dorsal; 77. habitus lateral; 78. head frontal; 79. head lateral; 80. wing. 81 – 82. Hypselosyrphus maurus female (paratype). 81. habitus dorsal; 82. habitus lateral. 83 – 84. Hypselosyrphus pingo female (holotype). 83. habitus dorsal; 84. habitus lateral.

FIGURES 85 – 89. 85 – 87. Hypselosyrphus pingo female (holotype). 85. head frontal; 86. head lateral; 87. wing. 88 – 89. Hypselosyrphus pingo. 88. female (paratype), habitus dorsal; 89. male (paratype), habitus dorsal. 90. Hypselosyrphus plaumanni male (holotype), habitus dorsal. Photo: American Museum of Natural History. 91 – 95. Hypselosyrphus pseudorhoga female (holotype). 91. habitus dorsal; 92. habitus lateral; 93. head frontal; 94. head lateral; 95. wing.

FIGURES 107 – 112. 107. Hypselosyrphus vexillipennis female (holotype), head frontal. 108 – 112. Hypselosyrphus, male genitalia. 108. H. amazonicus (Peru. coll. RMNH); 109. H. anax (holotype); 110. H. maurus (holotype); 111. H. pingo (paratype); 112. H. ulopodus (holotype) (dashed lines indicate missing part in specimen).