Romaleosyrphus bigoti 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 bigoti Moran

sp. nov.

Romaleosyrphus bigoti Moran sp. nov.

Figures 3A View Figure 3 , 4F View Figure 4 , 6F View Figure 6 , 9B View Figure 9 , 10B View Figure 10 , 11E View Figure 11

Type locality.

Mexico: Chiapas: San Cristóbal de las Casas, Huitepec, 16.7603, -92.6814, 2560m.


Holotype male, pinned. Original label: "Mexico-Chiapas // San-Cristobal-de-las-Casas // Huitepec Alt: 2560m. // N16°44 ’35”/W92°41’17” // 9-02-2009 // SAGOT P. n°7" " Diptera - Brachycera // Syrphidae // Criorhina sp. 1 // Male // Coll. SAGOT P. n°1016 " "J. Skevington // Specimen # // 52561" (ECO-TAP-E).

Differential diagnosis. Scutellum yellow pilose. Tergite II completely yellow pilose. Tergite III black pilose. Tergite IV black pilose. Male hind tibia as in Fig. 9B View Figure 9 . Male genitalia as in Fig. 11E View Figure 11 .


MALE. Body length: 15.2 mm. Wing length: 10.5 mm.

Head. Face shape as in Fig. 10B View Figure 10 ; face gold pruinose; gena black pilose posteriorly; anterior tentorial pit variable pilose: yellow or black; 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 mixed black and yellow pilose; scutum black pilose; 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; 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. 9B View Figure 9 .

Wing. Microtrichia absent from following areas: broad anterior margin of cell cua.

Abdomen. Tergites shiny to subshiny black; tergite I with scattered, yellow pile; tergite II with dense yellow pile; tergite III with black pile; tergite IV with black pile; grey pruinosity as follows: tergite I pruinose posteriorly, all of tergite II pruinose; sternites I-III yellow pilose and not pruinose; sternite IV black pilose; pile of postabdomen black. Male genitalia. (Fig. 11E View Figure 11 ) Cercus yellowish brown, broader at apex, covered with long yellow pile; surstylus brown, ca. 4 × as long as broad, broadened basally with apical ha1/2lf tapering, directed ventrally and 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 3/4 of lateral inner and outer surfaces.

FEMALE. Unknown.




Central American pine-oak forests ecoregion.


Named after Bigot who erected this genus in 1882.