Stipomorpha spuria, Reemer, Menno, 2013

Reemer, Menno, 2013, Taxonomic exploration of Neotropical Microdontinae (Diptera: Syrphidae) mimicking stingless bees, Zootaxa 3697 (1), pp. 1-88 : 68-70

Stipomorpha spuria spec. nov.

Figs 209–211 , 247 .

Type specimens: HOLOTYPE. SURINAM. Male. Commewijne, Peperpot. 05°46'08"N- 55°07'33"W. 20.IV.2006. Leg. M. Reemer. Coll. RMNH.

Description (based on holotype)

Adult male. Body size: 7 mm.

Head. Face occupying about 1/3 of head width in frontal view; shining yellow with whitish pilosity, most dense sublaterally and ventrally, almost bare medially. Gena developed, about as wide as 2nd antennal segment; yellow. Oral margins laterally a little produced; in lateral view reaching below ventral eye margin. Frons about as long as lunula; yellow; yellow pilose laterally. Vertex a little swollen; shining black; yellow pilose. Occiput black; yellow pilose dorsally, whitish pilose ventrally. Eye bare. Antennal fossa about as wide as high. Antenna pale brown. Antennal ratio approximately as 3:1:4; basoflagellomere parallel-sided with rounded apex, with small sensory pit at 2/3 from base. Arista black; slender; about 3/4 of length of basoflagellomere.

Thorax. Scutum black, but widely yellow along margins and narrowly along transverse suture; golden yellow pilose, except for medially interrupted fascia of black pile posteriorly of transverse suture. Postpronotum, postalar callus and scutellum yellow and yellow pilose. Scutellum semicircular, without calcars. Pleurae yellow, except ventral part of katepisternum, meron, dorsal part of katatergum and metanotum blackish. Anepisternum weakly convex, without distinction between anterior and posterior part; yellow pilose anterodorsally and along posterior margin. Anepimeron entirely yellow pilose. Katatergum and anatergum long and short microtrichose, respectively. Other pleurae bare. Calypter and halter yellow.

Wing: hyaline, without colouration, microtrichose except bare on basal 1/4 of cell br, basal 1/4 of cell bm, basal 1/5 of cell cup and basomedian 1/6 of alula.

Legs: Front- and mid-legs yellow and yellow pilose, except mid-femur partly black pilose posteriorly. Hind leg yellow, except apical 1/2 of tibia and first two tarsomeres darkened; femur yellow pilose, except black pilose anteriorly on basal 1/2; tibia yellow pilose on basal 1/3, black pilose on apical 2/3; first three tarsomeres black pilose dorsally, last two tarsomeres yellow pilose. Coxae and trochanters yellow and yellow pilose, except hind coxa black pilose anteriorly.

Abdomen. Yellow; entirely yellow pilose. Second tergite about as wide as thorax, widest at basal 1/3; third and fourth tergites much narrower. Sternites yellow; sparsely yellow pilose, except sternite 1 bare. Genitalia as in fig. 247.

Female. Unknown.

Etymology. The name spuria (Latin for false) was chosen in analogy of the names fallax , fraudator and mendax , which have approximately the same meaning, in order to stress the similarity of these species.

Diagnosis. Orange-brown species with black vertex, very similar in size and colouration to S. fallax , S. fraudator and S. mendax . Diagnostic characters: anepisternum with posterodorsal margin pilose, katepisternum dorsally bare, alula partly bare, wing without distinctly yellow parts.

Distribution. Only known from the holotype from Surinam.

Figures

FIGURES 201 – 211. 201 – 203. Stipomorpha puerilis female (holotype). 201. habitus dorsal; 202. habitus lateral; 203. head frontal. 04 – 208. Stipomorpha simillima male (holotype). 204. habitus dorsal; 205. habitus lateral; 206. head frontal; 207. head lateral; 208. wing. 209 – 211. Stipomorpha spuria male (holotype). 209. habitus dorsal; 210. habitus lateral; 211. face frontal.

FIGURES 246 – 251. Stipomorpha, male genitalia latera. 246. S. simillima (holotype); 247. S. spuria (holotype); 248. S. tenuicauda (Bolivia, coll. RMNH); 249. S. trigoniformis (holotype); 250. S. wheeleri (paratype); 251. S. zophera (holotype).