Stipomorpha maculipennis, Reemer, Menno, 2013

Reemer, Menno, 2013, Taxonomic exploration of Neotropical Microdontinae (Diptera: Syrphidae) mimicking stingless bees, Zootaxa 3697 (1), pp. 1-88 : 60-62

Stipomorpha maculipennis spec. nov.

Figs 177–181 , 241 .

Studied type specimens. HOLOTYPE. ARGENTINA. Male. Label 1: " ARGENTINA: Mis., / Iguazu Nat. Park, / hosteria Hoppe. / c. 140 m. Malaise trap / 10-11.iv.1974. C.R. Vardy / B.M. 1974-204"; label 2 (red): " HOLOTYPE / Stipomorpha / maculipennis / M. Reemer". Coll. BMNH.

Description (based on holotype)

Adult female. Body size: 9 mm.

Head. Face occupying slightly more than 1/3 of head width in frontal view; yellow; yellow pilose, short dorsally and medially, long ventrally and ventrolaterally. Gena yellow. Oral cavity with lateral margins produced. Frons about as long as width of lunula; blackish posterior to lunula, otherwise yellow; yellow pilose, except for posterolateral patches of black pile. Vertex swollen, in profile produced for about 1/3 of height of eye; yellow; yellow pilose, except for two large anterior patches of black pile and black pile along posterior margin. Occiput yellow, except blackish over short dorsolateral stretch; yellowish pilose. Eye bare. Antennal fossa about as wide as high. Antenna with scape yellowish brown, pedicel and basoflagellomere brown. Antennal ratio approximately as 3:1:5; basoflagellomere parallel-sided with rounded apex, with sensory pit at about 2/5 from base. Arista slender, about 3/4 of length of basoflagellomere.

Thorax. Scutum black, with widely yellow margins; black pilose, except yellow pilose along anterior and posterior margins and with medially interrupted fascia of yellow pile along transverse suture. Postpronotum, postalar callus and scutellum yellow and yellow pilose. Pleurae yellow, except posterior part of anepimeron, dorsal and ventral part of katepisternum, and meron brown. Anepisternum yellow pilose anterodorsally, bare posteriorly. Anepimeron yellow pilose dorsally. Katatergum and anatergum long and short microtrichose, respectively. Other pleurae bare. Metanotum black. Calypter and halter yellow.

Wing: hyaline, with a wide tinge on apical half and with a brown macula anteromedially, between costal vein and base of vein R2+3; microtrichose, except bare on 1st costal cell, extreme base of 2nd costal cell, entirely on cell br (except microtrichose along vena spuria ), basal 2/5 of cell bm, basal 1/5 of cell cup, basomedian 1/2 of alula. Legs: Yellow, except hind femur and tibia mostly brownish; yellow pilose, except most of hind leg black pilose. Hind tibia strongly widened; with long, dense black pilosity posteriorly. Coxae and trochanters yellow and yellow pilose.

Abdomen. Tergites 1–2 pale brown. Tergites 3–4 dark brown, except yellow along posterior margin. Tergites yellow pilose, except tergite 2 laterally with black pile intermixed. Sternites 1–3 dark brown. Sternite 4 yellow, except dark brown anteriorly. Sternite 1 bare, other sternites yellow pilose. Genitalia as in fig. 241.

Etymology. The specific epithet is composed of the Latin words macula (spot, mark) and penna (wing). This name refers to the brown macula on the wing of this species.

Diagnosis. This is the only known species of Stipomorpha with a dark brown macula anteromedially on the wing.

Distribution. Only known from Argentina.

Figures

FIGURES 173 – 185. 173 – 174. Stipomorpha mackiei male (holotype). 173. head frontal; 174. head lateral. 175 – 176. Stipomorpha, alula. 175. S. mackiei; 176. S. tenuicauda. 177 – 181. Stipomorpha maculipennis male (holotype). 177. habitus dorsal; 178. habitus lateral; 179. head frontal; 180. head lateral; 181. wing. 182 – 185. Stipomorpha mendax male (holotype). 182. habitus dorsal; 183. habitus lateral; 184. head frontal; 185. head lateral.

FIGURES 240 – 245. Stipomorpha, male genitalia. 240. S. mackiei (Surinam, coll. RMNH); 241. S. maculipennis (holotype); 242. S. mendax (holotype); 243. S. micromidas (Costa Rica, coll. INBIO); 244. S. mixta (Guyana, coll. BMNH); 245. S. panamana (holotype).