Romaleosyrphus vockerothi Moran & Thompson, 2021

Moran, Kevin M. & Skevington, Jeffrey H., 2021, Taxonomic revision of Romaleosyrphus Bigot (Diptera, Syrphidae), including descriptions of seven new species, ZooKeys 1075, pp. 1-32 : 1

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Romaleosyrphus vockerothi Moran & Thompson

sp. nov.

Romaleosyrphus vockerothi Moran & Thompson sp. nov.

Figs 4B View Figure 4 , 6B View Figure 6 , 10F View Figure 10 , 11D View Figure 11

Type locality.

Mexico: Durango: 14 miles Southwest of El Salto, 23.702771, -105.564051, 2438m.


Holotype male, pinned. Original label: "MEX. Dgo. 14 mi. SW. // El Salto, 8000' // 26 June 1964 // W. R. M. Mason" " CNC DIPTERA // # 142468" (CNC).

Paratypes: Mexico: Durango: 14 miles Southwest of El Salto, 23.702771, -105.564051, 2438m, J.F. McAlpine,, CNC_Diptera142470 (1♂, RMNH);, CNC_Diptera142471 (1♂, CNC); 24 mi. W. La Ciudad, 23.723225, -106.065172, 2133m, J.F. McAlpine, 2.vii.1964, USNM_ENT01261987 (1♂, USNM).

Differential diagnosis.

Scutellum completely yellow pilose. Tergites II and III extensively rufous to yellow pilose. Tergite IV dominantly black pilose. Hind trochanter tuberculate in male. Male hind tibia as in Fig. 9E View Figure 9 . Male genitalia as in Fig. 11D View Figure 11 .


MALE. Body length: 13.8-14.5 mm. Wing length: 9.8-10.5 mm.

Head. Face shape as in Fig. 10F View Figure 10 ; face silver or gold pruinose; gena black pilose posteriorly; anterior tentorial pit black pilose; frons broad, ca. as long as broad at antenna, 2/3 as broad at vertex as at antenna, black pilose and silver-gold pruinose; vertex triangular, longer than broad, black pilose and brown pruinose; postocular setae black; occipital setae variable: yellow or black; antenna reddish orange.

Thorax. Matte black; postpronotum variable pilose: black or mixed black and yellow; scutum either yellow pilose along margins with black pile medially, or completely black pilose; scutellum completely yellow pilose; postalar callus variable pilose: yellow, black, or mixed black and yellow; proepimeron black pilose; posterior anepisternum yellow pilose; katepisternum yellow pilose posteriorly with broadly separated patches; metasternum variable pilose: black, yellow or mixed black and yellow; anepimeron with anterior portion yellow pilose; lower calypter with long black pile.

Legs. Coxae black; femora black except extreme apex of femora; remainder of legs reddish; hind trochanter tuberculate as in Fig. 8B View Figure 8 ; fore and mid-coxae black pilose; hind coxa mixed black and yellow pilose; fore femur black pilose, except small mix of yellow pile basally; mid femur black pilose, but with stretch of yellow pile on posterior side; hind femur black pilose; tibiae and tarsi black pilose; hind tibia as in Fig. 9E View Figure 9 .

Wing. Wing completely microtrichose.

Abdomen. Tergites shiny to subshiny black; tergite I with scattered, yellow pile medially, except with short black pile in lateral corners; tergite II with dense yellow pile; tergite III with dense pile which is yellow anteromedially and rufous on the remainder; tergite IV with dense black pile, although sometimes red pilose medially; tergites I-III pruinose; sternites I-III yellow pilose and not pruinose; sternite IV variable: black or rufous pilose or some mix of the two; pile of postabdomen black or rufous.

Male genitalia. (Fig. 11D View Figure 11 ) Cercus yellowish brown, broader at apex, covered with long yellow pile; surstylus brown, distinctly longer than hypandrium, broadened basally with apical third tapering and not distinctly curved with a rounded apex, ventral margin concave, undulated; pile on dorsal surface of surstylus, increasing in length posteriorly; minute spines on ventral surface and apical 3/4th of lateral inner and outer surface.

FEMALE. Unknown.




Sierra Madre Occidental pine-oak forests.


Named after J. R. Vockeroth in honor of his lifetime of work on Syrphidae and who was the first to recognize characters distinguishing this species from the sympatric Romaleosyrphus arctophiloides many years ago.