Stipomorpha litoralis (Papavero, 1964)

Reemer, Menno, 2013, Taxonomic exploration of Neotropical Microdontinae (Diptera: Syrphidae) mimicking stingless bees, Zootaxa 3697 (1), pp. 1-88 : 59

Stipomorpha litoralis (Papavero, 1964)

Figs 169, 170 , 239 .

Ubristes litoralis Papavero, 1964: 21 . Type locality: Brazil, São Paulo, Caraguatatuba.

Studied type specimens. HOLOTYPE (in bad condition). BRAZIL. Male. Label 1: "Caraguatatuba - SP, (Res. Flor. - 40 m.), Brasil, 2.IV.1962, K. Lemko col."; label 2 (red): "Holotipo"; label 3: "28.646"; label 4: " Ubristes litoralis , sp. n., N. Papavero det. 1962". Coll. MZUSP.

Redescription (based on holotype)

Adult male. Body size: 7 mm.

Head. (head of holotype in bad condition, not al characters can be assessed) face black on median 1/2 to 3/4, with yellow laterally; entirely white pilose. Gena black. Occiput black; black pilose dorsally, white pilose ventrally. Oral cavity with produced lateral margins and notched anterior margin. Frons and vertex black and black pilose. Eye bare. Antennal fossa about as wide as high. Antenna (basoflagellomere missing in holotype) black; scape about twice as long as wide and twice as long as pedicel.

Thorax. Black, pleurae brown. Postpronotum, scutum, postalar callus and scutellum black pilose. Scutellum without calcars. Anepisternum a little convex, without sulcus, black pilose anterodorsally and along posterior margin. Anepimeron black pilose dorsally, white pilose ventrally. Katepisternum white pilose dorsally. Katepimeron bare. Calypter and halter blackish brown.

Wing: hyaline, except a little darker anterobasally; microtrichose except bare on basal 1/5 of cell br, posterobasal 1/4 of cell bm, basal 1/5 of cell cup.

Legs: brownish black, except fifth tarsomeres of middle leg yellow (other tarsi missing in holotype). Legs black pilose, except trochanter and tibia of foreleg and dorsobasal 1/2 of hind tibia pale pilose.

Abdomen. Shining blackish brown. Second segment wider than thorax, widest point at around half the length; third and fourth tergites strongly narrowing. Tergite 1 mostly black pilose, with patch of white pile at posterior 1/2 of lateral margin. Other tergites black pilose. Sternites bare. Genitalia as in fig. 239.

Diagnosis. Stipomorpha litoralis shares its pilose posterior anepisternum and pilose dorsal part of the katepisternum only with S. lacteipennis . From this species it differs by the lack of a whitish fascia in the wing and by the male genitalia.

Notes. According to Thompson et al. (1976) this is a synonym of Microdon triangularis Curran , but that taxon is here treated as a synonym of M. lacteipennis Shannon.

Distribution. Only known from the holotype, which is from São Paulo, Caraguatatuba, in Brazil.

Figures

FIGURES 163 – 172. 163 – 164. Stipomorpha lacteipennis male (holotype). 163. habitus lateral; 164. head frontal. 165. Stipomorpha lanei male (Surinam, coll. RMNH), habitus dorsal. 166 – 167. Stipomorpha lanei female (French Guyana, coll. RMNH). 166. head frontal; 167. head dorsal. 168. Stipomorpha lanei female (holotype), habitus dorsal. Photo: American Museum of Natural History. 169 – 170. Stipomorpha litoralis male (holotype). 169. habitus dorsal; 170. habitus lateral. 171 – 172. Stipomorpha mackiei male (holotype). 171. habitus dorsal; 172. habitus lateral.

FIGURES 233 – 239. Stipomorpha, male genitalia. 233. S. fraudator (holotype); 234. S. goettei (Surinam, coll. RMNH); 235. S. guianica (Surinam, coll. RMNH); 236. S. inarmata (holotype); 237. S. lacteipennis (lectotype); 238. S. lanei (Surinam, coll. RMNH); 239. S. litoralis (holotype).