Diglyphomorphomyia pedunculata Hansson 2022, sp. nov.

Diglyphomorphomyia pedunculata sp. nov.

Figs 13, 14, 19, 20, 30, 34, 37, 38

Diagnosis. Female with yellowish-white antennal clava (Fig. 14); hind leg with coxa, trochanter and major part of femur white (Fig. 14), fore wing infumate with median one-third darker brown (Fig. 14); male with strongly pedunculate funiculars (Fig. 20); both sexes with head and mesosoma dark brown to black (Figs 13, 19), pronotal collar without a carina along anterior margin (Figs 13, 19), with two pairs of long and strong setae on midlobe of mesoscutum (Figs 13, 19), and with sublateral grooves on mesoscutellum ±straight in lateral part, joining in posterior part (Figs 13, 19).

Description (female holotype). Length 1.7mm. Frons and vertex with weak reticulation; Pronotal collar without a carina along anterior margin. Mesoscutum with weak reticulation; midlobe with two pairs of long and strong setae. Mesoscutellum and axillae smooth and shiny; mesoscutellum with sublateral grooves joining in posterior part. Dorsellum and propodeum with weak reticulation; propodeal callus with eight setae. Fore wing with five setae on dorsal surface of submarginal vein; with 20 admarginal setae; costal cell with a row of eleven setae on ventral surface, apico-dorsal margin with three setae. Gaster semicircular.

Colour. Head black.Antennae with scape whitish with dorsal edge yellowish-brown, pedicel and F1 pale brown, F2–3 dark brown, F4 pale yellowish-brown with base slightly darkened, clava yellowish-white. Mesoscutum, mesoscutellum and dorsellum black; propodeum dark brown. Fore and mid legs with coxae, trochanters and femora dark brown, tibiae and tarsi yellowish-brown; hind leg with coxa, trochanter and basal two-thirds of femur white, apical one-third of femur, tibia and tarsus yellowish-brown. Wings infumate, fore wing with median one-third darker brown. Petiole dark brown. Gaster yellowish-brown with posterior margin of Gt 1 dark brown.

Relative measurements. Head: length in dorsal view 22; length in frontal view 42; width 53; POL 11; OOL 6.5; mouth width 14; malar space 10; eye height 28.5; lateral ocellus maximum width 4; scape length 24.5; scape width 4.2; pedicel length 7; pedicel width in dorsal view 4; pedicel+flagellum length 60; F1 length 13; F2 length 9; F3 length 8; F4 length 8; antennal clava length 14; F1 width 3.5; F2 width 5; F3 width 5.5; F4 width 6; antennal clava width 6. Mesosoma: length 69; width 47; midlobe of mesoscutum length 23; mesoscutellum length 28; mesoscutellum width 23.5; dorsellum length 4; propodeum length 16; mid tarsus length 26; mid tarsus T4 length 4.5; hind tarsus length 26; hind tarsus T4 length 5.5; fore wing length 85; fore wing width 51; costal cell length 29; costal cell width 2; marginal vein length 40; postmarginal vein length 13.5; stigmal vein length 10. Gaster: length 64; width 51; Gt 1 length 32; Gt 7 length 4; Gt 7 width 12.

Variation in paratypes. Length 1.7–2.3mm. Antenna with F4 yellowish-white to dark brown. Fore wing submarginal vein with 4–5 setae on dorsal surface. Propodeal callus with 8–9 setae. Otherwise as in holotype.

Male. Length 1.1–1.9mm. Antennal flagellum dark brown, funiculars with apical part strongly pedunculate. Mesoscutellum with weak reticulation. Hind leg with coxa dark brown and femur with basal half white and apical half dark brown. Otherwise as in female.

Relative measurements. Head: length in dorsal view 16; length in frontal view 29; width 36; POL 7.5; OOL 4.5; mouth width 10.5; malar space 8; eye height 20; scape length 16; scape width 3.5; pedicel+flagellum length 75; F1 length 14; F2 length 13; F3 length 13; F4 length 11.5; antennal clava length 18; F1 width 4.5; F2 width 4.5; F3 width 5; F4 width 5; antennal clava width 5. Mesosoma: length 49; width 30; midlobe of mesoscutum length 15; mesoscutellum length 20; mesoscutellum width 15; dorsellum length 3; propodeum length 11. Gaster: length 37; width 29; Gt 1 length 23.

Distribution. Belize, Costa Rica.

Etymology. From the Latin pedunculata = with slender stalk, referring to pedunculate funiculars in male antennae.

Material. Holotype female: COSTA RICA, Puntarenas, San Vito, Las Cruces, Wilson Botanico, 8º47’N, 82º58’W, 1000–1300m, 19–29.ii.2008, C. Hansson (MZLU). Paratypes (46♀ 97♂, CNC, MZLU, MZUCR, NHMUK): 6♀ 6♂ with same label data as holotype; following from same locality as holotype but collected v.1988 (1♂), 7–19.ii.2007 (1♀ 5♂), 15–16.ii.2006 (1♀); 27♀ 39♂ COSTA RICA, Puntarenas, Estación Altamira, 9º02’N, 83º00’W, 1450–1700m, 7.ii–5.iii.2002, C. Hansson & Parataxonomos; 1♂ from same locality as previous but collected 20.i–28.ii.1995; 1♂ COSTA RICA, Puntarenas, D.C.L.D.C., Buenos Aires, LS 338200_570350, 1840m, 24.iv–6.vi.1999, R. Villalobos; 1♀ COSTA RICA, Alajuela, 7km N Boca Tapada, Laguna Lagerta Lodge, 10º41’N, 84º11’W, 55m, 18–19.ii.2019, J.S. Noyes; 2♂ COSTA RICA, Cartago, Humo, El Copal, 9º47’N, 83º45’W, 1050– 1250m, 29.ii–6.iii.2008, C. Hansson; 1♂ COSTA RICA, Cartago, Dulce Nombre, Vivero Linda Vista, 1300m, viii–x.1993, P. Hanson; 3♀ COSTA RICA, Heredia, 11km SE La Virgen, 10º20’N, 84º04’W, 450–550m, 13.ii– 20.iv.2003; 2♂ COSTA RICA, Heredia, Estación Biológica La Selva, 50m, 10º26’N, 84º01’W, ii.1991, J.S. Noyes; 1♂ from same locality as previous but collected xi.1995; 4♀ 1♂ COSTA RICA, San José, San Antonio de Escazú, 9º54’N, 84º09’W, 1300m, vi–ix.1997, P. Hanson; 1♂ from same locality as previous but collected ix.1998; 2♂ COSTA RICA, Limón, Reserva Biológica Hitoy Cerere, 9º40’N, 83º02’W, 100m, 14–18.i.1991, J.S. Noyes; following from same locality as previous but collected 24–25.ii.2004 (2♀ 7♂), 20–21.ii.2006 (2♀ 13♂), 24–26.ii.2008 (1♀ 9♂), 22–23.ii.2010 (2♂); 1♂ BELIZE, Las Cuevas, vi.1995, T. King & D. Howe.