Romaleosyrphus drysus Moran, 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 drysus Moran

sp. nov.

Romaleosyrphus drysus Moran sp. nov.

Figures 5B View Figure 5 , 7B View Figure 7

Type locality.

Honduras: La Muralla National Park, vicinity of visitor center, 15.1058, -86.7528, 1460m.


Holotype female, pinned. Original label: "HONDURAS: Olancho // La Muralla National Park // vicinity of Visitor Center // 1460 m; 9-13 May 1999 // D.C. Hawks & J. Torres" "Univ. Calif., Riverside // Ent. Res. Museum // UCRC ENT 00035151" (UCRC).

Differential diagnosis. Scutellum entirely yellow pilose. Tergite II black pilose except yellow pilose in anterolateral corners and along the posterior rim. Tergite III extensively black pilose.

Description. FEMALE. Body length: 13.4 mm. Wing length: 8.9 mm.

Head. Face non-pruinose; gena black pilose anteriorly; anterior tentorial pit black pilose; frons, black pilose and brown pruinose; vertex black pilose and brown pruinose; postocular setae black; occipital setae black; antenna reddish orange.

Thorax. Matte black; postpronotum yellow pilose; scutum yellow pilose along margins and black pilose medially; scutellum yellow pilose; postalar callus yellow pilose; proepimeron yellow pilose; posterior anepisternum yellow pilose; katepisternum yellow pilose posteriorly with broadly separated patches; metasternum mixed black and yellow pilose; 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; 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.

Wing. Microtrichia absent in following areas: cell c along margin of vein Sc running from 2/5 and ending at 4/5 of length of the cell, cell br except along margins of cell and along spurious vein and the part right below the start of vein r2+3, all of cell cua except extreme posterior, ventral half of cell bm, cell m4 from cross-vein m-cu to end of vein M4 and cell dm in ventral 1/3 of cell and along broad margin following vein M2.

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 on anterior 2/3 and black pile on anterior third; tergite III with black pile; tergite IV with black pile; tergites not distinctly pruinose; sternites I-III yellow pilose and not pruinose; sternite IV black pilose; pile of postabdomen black.

MALE. Unknown.




Central American montane forests ecoregion.


Named Romaleosyrphus drysus , derived from the Greek drys for oak, in reference to the high elevation oak forests this species lives in. It is a noun in apposition.