Nagehana parvula Urra 2023, sp. nov.

Nagehana parvula Urra sp. nov.

(Figs. 13, 14, 31, 32, 48, 49).

Diagnosis. Nagehana parvula is easily recognizable by its color pattern, by presenting white head and thorax, brown FW and light grey HW. Species similar in size are N. elquiensis (Beéche, 2003) and N. minuscula Urra, 2018, although their constrasting coloration is light brown, and they can be separated by examining their genital structures. In N. parvula the juxta is suboval and the lateral lobes of the juxta are elongated and acute, the vesica has spiny cornuti; in the female the posterior end of the antrum is slightly sclerotized. In N. elquiensis the lobes of the juxta are elongated and acute, similar to the median lobe, vesica without cornuti; in the female the antrum is tubular and sclerotized, wider at its posterior end; and in N. minuscula the lateral lobes of the juxta are longer than the median lobe, suboval with a curved pointed apex, the vesica is armed with small cornuti; the female is unknown (Beéche 2003; Urra 2018b).

Description

Male (Fig. 13). Wingspan: 11.0–15.0 mm (n = 14).

Head. Front and vertex white; flagellum, scape and pecten grey; labial palpus brown, apex of second and third segments white (Fig. 14); haustellum greyish white.

Thorax. Yellowish white, tegulae brown. FW brown, two black spots at the base and a black spot at the distal end of DC, row of black spots on margin from postmedial area to tornus; fringe brown. HW grey, fringe greyish brown. Fore- and midlegs dark grey, tarsal segments annulated, hindleg yellowish white; hind tibia with yellowish white piliform scales.

Abdomen. Grey. Terga with spiniform setae arranged in wide patches (Fig. 32).

Male genitalia (Fig. 48). Uncus and gnathos subtriangular, gnathos longer than uncus, juxta subboval, lateral process elongate, acute; valva subtriangular longer than wide, cucullus covered profusely by thin setae, internal process of sacculus hook-shaped; phallus 0.8 times as long as valva, slightly curved (Fig. 48b), vesica armed with short spine-shaped cornuti.

Female. Color pattern similar to male. Wingspan: 14.4–14.5 mm (n = 2).

Genitalia of the female (Fig. 49). Apophysis posterioris 1.7 times as long as apophysis anterioris; ostium bursae transverse, antrum slightly sclerotized, 0.03 times as long as ductus bursae; ductus bursae membranous, 1.8 times as long as corpus bursae, not spiral-shaped, corpus bursae subspherical, without signum.

Type material. Holotype: (♁) CHILE CAUTIN, Carahue Villa Las Araucarias, 38°29′30″S 73°15′40″W, 28-I-2019, Trampa luz col. F. Urra (MNNC). Paratypes: (1♁) CHILE COLCHAGUA, Chimbarongo La Virgen, 34°44′23.3″ S 70°49′30.3″ W, 5-XII-2020, Trampa luz col. F. Urra (MNNC); (1♁) CHILE —BIOBIO, EL QUEULE, Cam. viejo a Hualqui, 6. 13 Ene. 2012, Leg. S. ROTHMANN (CSAG); (2♀, 11♁) CHILE CAUTIN, Carahue Villa Las Araucarias, 38°29′30″S 73°15′40″W, 28-I-2019, Trampa luz col. F. Urra (MNNC).

Distribution. Central and Southern Chile (Colchagua, Concepción, Cautín).

Etymology. The specific epithet parvula (= little) is a Latin adjective and refers to the small size of the species.