Chalarus delicatus Rafael, 1990

Ramos-Pastrana, Yardany, Marques, Dayse Willkenia A. & Rafael, José Albertino, 2023, Chalarus (Diptera: Pipunculidae) of Colombia, with description of two new species and an updated key to males of the Neotropical species, Acta Entomologica Musei Nationalis Pragae 63 (2), pp. 383-395 : 389

Chalarus delicatus Rafael, 1990

( Figs 44–54 , 55 )

Chalarus delicatus Rafael, 1990: 49 , Figs 7–9 .

Chalarus delicatus : JERVIS (1992:346); DE MEYER (1996:15); KEHLMAIER & ASSMANN (2010: 12); RODRÍGUEZ & RAFAEL (2012: 17).

Chalarus spuruius : HARDY (1965): 2 (partim).

Material examined (1 J). COLOMBIA, Caquetá, San José del Fragua, / Vda. [Vereda] Bellavista, Fca.[Finca] Mi Ranchito, / 01º18’23’’N / 76º00’33’’W, 265 m [eters], / 29.Mar[ III] –12.Abr[ IV].2017, / trampa Malaise en dosel del bosque, / Y. Ramos-Pastrana ( LEUA – 00000049809) (photographed specimen).

Diagnosis. Pedicel with four setae dorsally and two ventrally. Hind tibia with 1–2 strong setae medially. Both surstyli with outer margins slightly curved; inner margin of each surstylus forming an angle of approximately 130º centrally, apices truncated and converging, without sinus at junction with epandrium in lateral view. Gonopods with apices rounded; left gonopod with apex slightly thinner than right one. Tip of distiphallus short and acute, without phallic processes. Phallus trifid, one ejaculatory duct apically, the other two medially and forward-directed in ventral view, not visible in dorsal view.

Intraspecific variability. RAFAEL (1990) provided a complete description and illustrations of the Brazilian holotype; however, we found variations in the Colombian material. Therefore, we provide a comparison of the variations between the Colombian and Brazilian specimens (between parenthesis, when comparable).

Male. Head ( Figs 44–45 ). Occiput dark brown, gray-brown pruinose. Antenna ( Fig. 46 ) brown (versus antenna dark brown to black in the holotype); pedicel with four setae dorsally and two ventrally. Thorax ( Figs 45, 47 ). Postpronotal lobe brown, gray-brown pruinose. Scutum dark brown, gray-brown pruinose (versus scutum black, brown pruinose). Notopleuron and scutellum concolorous with scutum. Mesopleuron brown, gray-brown pruinose. Mediotergite concolorous with mesopleuron. Wing ( Fig. 48 ). Membrane slightly infuscated. Legs ( Fig. 44 ) entirely brown, except tarsomeres 1–4 light brown (versus legs black, except femoro-tibial articulations and all tarsomeres light brown); pulvilli light brown. Abdomen ( Figs 45, 49 ) brown, gray-brown pruinose, with long setae laterally and short scattered setae dorsally; tergite 1 light brown basally, dark brown posterolaterally; tergite 1–5 with transverse bands brown pruinose dorsally; tergite 6 clearly shorter than tergite 5; syntergosternite 8 with long apical setae (Fig. X). Terminalia ( Figs 50–54 ). Epandrium and surstyli brown ( Fig. 50 ). Surstyli ( Figs 50–52 ) subsymmetrical and setose, with long seta apically; both surstyli with outer margins slightly curved, inner margin of each surstylus forming angle of approximately 130º centrally, apices truncated and converging ( Fig. 50 ); both surstyli with apices rounded; left surstylus in lateral view with apex slightly thinner than right one ( Figs 51–52 ). Gonopods subsymmetrical; left gonopod with apex slightly thinner than right one ( Figs 51–52 ). Tip of distiphallus short with tip acute ( Fig. 53A ). Ejaculatory apodeme pin-shaped ( Fig. 54 ). Phallus trifid, one ejaculatory duct apically, the other two medially and forward-directed in ventral view, not visible in dorsal view ( Figs 53A–B ).

Habitat. The specimen was collected in the canopy in preserved areas of tropical rainforest in the Colombian Amazon, Department of Caquetá.

Geographical distribution. Brazil (São Paulo, Paraná, Santa Catarina) ( RAFAEL 1990), Colombia (Caquetá) (new record) ( Fig. 55 ).

Figures

Figs 44–54. Chalarus delicatus Rafael, 1990 (LEUA–00000049809). Male. 44 – habitus, left lateral view; 45 – habitus, dorsal view; 46 – antenna; 47 – thorax, dorsal view; 48 – wing; 49 – abdomen, dorsal view; 50 – terminalia, dorsal view; 51 – left surstylus and gonopod, lateral view; 52 – right surstylus and gonopod, lateral view; 53a – phallic guide, subapical processes and phallus, left lateral view, 53b – phallus dorsal view; 54 – ejaculatory apodeme.

Fig. 55. Geographical records of Chalarus species in Colombia. Chalarus absonus Rafael, 1990, C. boyacensis sp. nov., C. chairensis sp. nov., C. connexus Rafael, 1988, and C. delicatus Rafael, 1990.

Figs 1–11. Chalarus absonus Rafael, 1990 (IAvH–M1271). Male. 1 – habitus, left lateral view; 2 – habitus, dorsal view; 3 – antenna; 4 – thorax, dorsal view; 5 – wing; 6 – abdomen, dorsal view; 7 – terminalia, dorsal view; 8 – left surstylus and gonopod, lateral view; 9 – right surstylus and gonopod, lateral view; 10a – phallic guide, subapical processes and phallus, right lateral view, 10b – phallus dorsal view; 11 – ejaculatory apodeme.