Romaleosyrphus soletluna 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 soletluna Moran & Thompson

sp. nov.

Romaleosyrphus soletluna Moran & Thompson sp. nov.

Figures 4C, D View Figure 4 , 6C, E View Figure 6 , 9D View Figure 9 , 10D View Figure 10 , 11B View Figure 11

Criorhina sp. Ståhls (2006): 25.

Romaleosyrphus sp. MZH Y247 Moran et al. (2021): 30.

Type locality.

COSTA RICA, Villa Mills, 9.564227, -83.707515, 3000m.


Holotype male, pinned. Original label: "COSTA RICA S José // Villa Mills 3000m // 24.II.87 D. M. Wood" "USNMENT // [BARCODE] // 01261985" (CNC). Paratypes: COSTA RICA: Cartago: 11 mi. S.W. of Cartago, 9.730195, -84.034415, 1920m, C.D. Michner et al., 3.vii.1963, KMM0918 (1♀, USNM); Guanacaste: Est. Cacao. Guanacaste, 10.958528, -85.495649, 1200 to 1400m, Steve Marshall, 20.ii.1996, INBIOCRI002239730 (1♂, CNC); Heredia: Área de conservación Cordillera Volcánica Central, 9.555000, -83.670000, 1.ii.1990, R. Gerardo, INBIOCRI000154398 (1♂, INBIO); 15.iv.2002, Z. M. Ángel, INB0003945461; INB0003945468 (2♂, INBIO); 10.132, -84.125, 21.iv.2003, Z. M. Ángel, INB0003702365 (1♂, INBIO); Cerro Chompipe, Res. Biol. Chompipe, 10.088, -84.071, 1900m, G. & M. Wood, 17.i.1999, CNC_DIPTERA249643 (1♂, CNC); ...2100m, J.F. Corrales, 1994, INBIOCRI001146848; ...INBIOCRI001146849 (2♂, USNM); Parque Nacional Braulio Carrillo, Estación Barva, 10.133492, -84.121242, 2500m, J.F. Corrales, ii.1990, INBIOCRI000167748 (1♂, EMEC); ...A. Fernández, iii.1990, INBIOCRI00019854 (1♂, USNM); ...G. Rivera & A. Fernández, iii.1990, INBIOCRI000169854 (1♂, USNM); ...x.1989, INBIOCRI000108632 (1♀, USNM); … xi.1989, INBIOCRI000139986 (1♂, CDFA); ...G. Rivera, ix.1989, INBIOCRI000111238 (1♀, USNM); Puntarenas: Área de conservación Arenal, 10.298, -84.793, 1.i.1993, O. Norman, INBIOCRI001369122 (1♂, INBIO); Est. La Casona, Res. Biol. Monteverde, 10.302815, -84.796543, 1520m, N. Obando, iii.1991, INBIOCRI001309535 (1♂, RMNH); Monteverde, Cerro Chomogo, 10.32689, -84.8058, 1800m, D.M. Wood, 22-30.viii.1996, CNC_DIPTERA249644 (1♂, CNC); Monteverde, 10.302815, -84.796543, 1500m, D.M. Wood, 24-28.ii.1991, USNM_ENT01261986 (1♂, USNM); Golfo Dulce, 3km SW. Rincón, 8.670722, -83.514359, 10m, H. Wolda, iii.1991, USNM_ENT1087008 (1♀, USNM); San José: Área de conservación La Amistad Pacífico, 9.555000, -83.670000, 13.i.1996, G. R. Billen, INBIOCRI002392420 (1♀, INBIO); 9.459000, -83.553000, 2.iii.1993, Z. M. Angel, INBIOCRI001305894 (1♀, INBIO); Cerro Muerte, 20 km S. Empalme, 9.566582, -83.749957, 2800m, Hanson,, USNM_ENT1087023 (1♀, USNM); PANAMA: Chiriquí: Guadalupe arriba, 8.871076, -82.550536, H. Wolda, 1.viii-4.ix.1984, USNM_ENT1087055 (1♂, USNM).

Differential diagnosis. Scutum entirely black pilose with at most only with a few anterolateral yellow pili on scutellum or mesonotum entirely yellow to rufous pilose. Male hind tibia as in Fig. 9D View Figure 9 . Male genitalia as in Fig. 11B View Figure 11 .


black morph.

MALE. Body length: 13.8-15.3 mm. Wing length: 9.6-10.5 mm.

Head. Face shape as in Fig. 10D View Figure 10 ; face 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 gold pruinose; vertex triangular, longer than broad, black pilose and brown pruinose; postocular setae black; occipital setae black; antenna reddish orange.

Thorax. Matte black; postpronotum mixed black and yellow pilose; scutum black pilose, except sometimes scattered yellow pile along lateral margins; scutellum black pilose, except with scattered yellow pile along posterior margin; postalar callus black pilose or mixed black and 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. 9D View Figure 9 .

Wing. Microtrichia absent in following areas: broad anterior margin of cell cua, cell br except along spurious vein and the part right below the start of cell r2+3;

Abdomen. Tergites shiny to subshiny black; tergite I with scattered, yellow pile; tergite II with dense black pile medially and yellow pile on lateral sides; tergite III with black pile except mixed yellow pile anteromedially and yellow pile in anterolateral corners; 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 genitalia. (Fig. 11B View Figure 11 ) Cercus yellowish brown, broader at apex, covered with long yellow pile. Surstylus brown, ca. 2 × as long as broad, broadened basally with apical half tapering, directed downward and with an acute 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.


rufous morph.

MALE. Same as black morph except as follows.

Head. Gena yellow pilose posteriorly; anterior tentorial pit yellow pilose; vertex rufous pilose; postocular setae rufous; occipital setae rufous.

Thorax. Postpronotum rufous pilose; scutum rufous pilose; scutellum rufous pilose; postalar callus rufous pilose.

Legs. Coxae yellow pilose; fore and mid femora yellow pilose; hind femur rufous pilose; tibiae and tarsi black pilose; metasternum yellow pilose.

Abdomen. Tergite II with dense rufous pile medially and yellow pile on lateral sides; tergite III with rufous pile except mixed yellow pile anteromedially and yellow pile in anterolateral corners; tergite IV with rufous pile; sternites I-IV rufous pilose; pile of postabdomen rufous.

FEMALE. As male, except for usual sexual dimorphism; microtrichia on wing absent in following areas: middle third of cell r1, cell r2+3 along margin of vein R2+3 on the anterior third of cell, cell br except along spurious vein and the part right below the start of cell r2+3, all of cell cua except extreme posterior, ventral 2/3 of cell bm, cell cup along the margin of vein CuP in the posterior half, cell m4 from cross-vein m-cu to end of vein M2 and cell dm except for a thin line of microtrichia extending from cross-vein bm-m into middle of cell and the margins of cross-vein dm-m.


Costa Rica and Panama.


Talamancan montane forests (one specimen was collected in lowland rainforest).


Color morphs are considered to be intraspecific variation. No morphological differences were found outside of pile coloration in male genitalia or external characters. Additionally, these morphs are not associated with distinct COI haplotypes. It is difficult to argue in favor of interspecific variation without the addition of contradictory genetic evidence or fieldwork showing these morphs do not interbreed.


Named Romaleosyrphus soletluna , a combination of the Latin words sol, for sun, and luna, for the moon. It is a reference to the duality of the color morphs in this species. It is a noun in apposition.














Romaleosyrphus soletluna Moran & Thompson

Moran, Kevin M. & Skevington, Jeffrey H. 2021


Moran & Skevington 2021


Moran & Skevington 2021