Dasydorylas nigellus ( Rafael, 1991 )

Ramos-Pastrana, Yardany, Marques, Dayse Willkenia A. & Rafael, José Albertino, 2024, Dasydorylas Skevington, 2001 (Pipunculidae, Tomosvaryellini) of Colombia, with description of three new species and a key to Neotropical males, European Journal of Taxonomy 932, pp. 138-157 : 147-149

publication ID

https://doi.org/ 10.5852/ejt.2024.932.2517

publication LSID

lsid:zoobank.org:pub:1137F37F-AF51-44E2-8D3E-3C68992029A5

DOI

https://doi.org/10.5281/zenodo.11127164

persistent identifier

https://treatment.plazi.org/id/03CE8793-803C-804E-FDB0-85D7FB27F998

treatment provided by

Plazi

scientific name

Dasydorylas nigellus ( Rafael, 1991 )
status

 

Dasydorylas nigellus ( Rafael, 1991)

Figs 27–39 View Figs 27–39 , 53 View Fig

Eudorylas nigellus Rafael, 1991: 156 View in CoL , figs 12–16, 37.

Dasydorylas nigellus – Rafael & Ale-Rocha 2004: 12.

Diagnosis

Male

Postpedicel with acuminate apex. Vein M 1 straight. Fore and mid femora with conspicuous ventral ctenidia; hind femur without ventral ctenidia. Tergite 1 completely covered by brown pruinosity, with spot dark brown pruinose dorsocentrally and six black and long setae laterally; tergites 2–4 with posterior thin margins brown pruinose; tergite 5 with posterior wide margin gray-brown pruinose. Surstyli equal to epandrium length I dorsal view. Both surstyli thickened in basal half, thin in distal half, with apices outwards-directed; both surstyli with tips downward-directed and rounded apex when seen in lateral view. Apex of phallic guide stout, with margin slightly straight in lateral view. Ejaculatory apodeme funnel-shaped. Phallus trifid, thin, with ducts distinctly separated only in the apex.

Material examined

COLOMBIA – Boyacá • 1 ♂; “ SFF [Santuario de Fauna y Flora] Iguaque , Cab. [Cabaña] Mamaramos ; 06°26′ N, 73°27′ W; 2855 m [eters]; 13–30.Jul [VII].2000; P. Reina leg.”; IAvH M380 (photographed specimen) GoogleMaps .

Intraspecific variability

Male

Rafael (1991) provided a complete description and illustrations of the Brazilian holotype; however, we found variations in the Colombian specimens, therefore, we provide a comparison of the variations between the Colombian and Peruvian specimens (in parentheses, when applicable).

MEASUREMENTS. Wing length 5.9 mm.

HEAD ( Figs 27–28 View Figs 27–39 ). Eyes contiguous for 20 facets. F, EM, V (mm) = 0.3, 0.5, 0.1. Frontal triangle dark brown, gray-brown pruinose, with callus shiny dark brown (vs frontal triangle opaque black, with callus shiny black in the holotype). Occiput brown, gray-brown pruinose. Antenna ( Fig. 29 View Figs 27–39 ) brown, pedicel with two setae dorsally, three ventrally; postpedicel with acuminate apex (vs antenna black, pedicel with three setae dorsally and four setae ventrally; see Rafael 1991: fig. 12). LPP/WPP = 2.9.

THORAX ( Figs 27–28, 30 View Figs 27–39 ). Postpronotal lobe dark brown, brown pruinose, with four long setae along upper margin (vs postpronotal lobe opaque black). Scutum dark brown, gray-brown pruinose, with dorsocentral setae conspicuous (vs scutum opaque black, brown pruinose). Notopleuron concolorous with scutum (vs notopleuron opaque black, brown pruinose). Scutellum concolorous with scutum (vs opaque black, brown pruinose). Mesopleuron and mediotergite brown, gray-brown pruinose (vs mesopleuron and mediotergite black, brown pruinose).

WING ( Fig. 31 View Figs 27–39 ). Length 5.9 mm. LW/MWW = 3.9; LTC/LFC = 1.9. Membrane brown infuscated, vein M 1 straight. Halter stem dark brown, except beige third medial, knob dark brown.

LEGS ( Fig. 27 View Figs 27–39 ). Coxae dark brown, gray-brown pruinose (vs coxae black); trochanters brown, brown pruinose (vs trochanters black); femora dark brown, gray-brown pruinose, except brown apices (vs femora black); tibiae dark brown, gray-brown pruinose, except basal quarter; tarsomeres 1–4 brown, 5 brown; pulvilli yellowish brown.

ABDOMEN ( Figs 28, 32 View Figs 27–39 ). Ground color velvety dark brown, with inconspicuous scattered setae; tergite 1 completely covered by brown pruinosity, with spot dark brown pruinose dorsocentrally (vs abdomen opaque black, gray pruinose) and six black and long setae laterally; tergites 2–4 with posterior thin margins brown pruinose; tergite 5 with posterior wide margin gray-brown pruinose; tergites and sternites 6 and 7 as in Fig. 33 View Figs 27–39 . Syntergosternite 8 dark brown, gray-brown pruinose, shorter than tergite 5, with a membranous area apically ( Fig. 32 View Figs 27–39 ) (vs Syntergosternite 8 acuminate, larger than tergite 5; see Rafael 1991: fig. 13).

TERMINALIA ( Figs 33–39 View Figs 27–39 ). Epandrium and surstyli dark brown ( Fig. 34 View Figs 27–39 ). Surstyli ( Figs 34–36 View Figs 27–39 ) subsymmetrical, equal to epandrium length, setose marginally. Both surstyli thickened in basal half, thin in distal half, with apices outwards-directed in dorsal view ( Fig. 34 View Figs 27–39 ); left surstylus slightly thinner than right ( Fig. 34 View Figs 27–39 ) (vs surstylus long; see Rafael 1991: fig. 15), both surstyli with tips downward-directed and rounded apex when seen in lateral view ( Figs 35–36 View Figs 27–39 ). Gonopods asymmetrical; right gonopod slightly thicker than left in ventral view ( Fig. 37 View Figs 27–39 ). Apex of phallic guide stout, with apex hook-shaped and upper margin slightly straight in lateral view ( Fig. 37 View Figs 27–39 ). Ejaculatory apodeme funnel-shaped ( Fig. 39 View Figs 27–39 ). Phallus trifid, thin, with ducts distinctly separated only in distal quarter ( Figs 37–38 View Figs 27–39 ).

Female

Unknown.

Geographical distribution

Colombia (Boyacá) (new record), Peru (Huánuco) ( Fig. 53 View Fig ).

Habitat

The specimen was collected in the Santuario de Fauna y Flora Iguaque reserve, where the vegetation is composed of cloud Andean forests of the cordillera of the Northeast region of Colombia.

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Pipunculidae

Genus

Dasydorylas

Loc

Dasydorylas nigellus ( Rafael, 1991 )

Ramos-Pastrana, Yardany, Marques, Dayse Willkenia A. & Rafael, José Albertino 2024
2024
Loc

Dasydorylas nigellus

Rafael J. A. & Ale-Rocha R. 2004: 12
2004
Loc

Eudorylas nigellus

Rafael J. A. 1991: 156
1991
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF