Adaina jobimi, Vargas, 2020

Vargas, Hector A., 2020, Adaina jobimi sp. nov., a plume moth (Lepidoptera, Pterophoridae) associated with Baccharis alnifolia (Asteraceae) in the Andes of northern Chile, Nota Lepidopterologica 43, pp. 329-336 : 329

Adaina jobimi sp. nov. Figs 1-6 , 7-11 , 12

Type material.

Holotype, male, Chile: Socoroma, Parinacota, Chile; emerged April 2018; H.A. Vargas leg.; ex-larva inflorescence Baccharis alnifolia ; March 2018; genitalia slide HAV-1389 (specimen and genitalia slide deposited at MNNC).

Paratypes, Chile. Three males (genitalia slides HAV-1142, HAV-1385, HAV-1387), one female (genitalia slide HAV-1386), same data as for holotype (specimens and genitalia slides deposited at IDEA).

Type locality.

About 2 km south of Socoroma village (18°27 ’22” S, 69°35 ’15” W), Parinacota Province, northern Chile, at about 3400 m elevation on the western slopes of the Andes.

Diagnosis.

Adaina jobimi resembles the Neotropical Adaina excreta Meyrick, 1930, described from Peru, also known from Argentina and Ecuador. However, the two species can be separated accurately based on genitalia morphology. In the male, A. jobimi has the saccular spine of the left valva almost straight along the medial third with the distal third curved towards the costa, a small saccular process on the right valva, juxta narrower dorsally, right arm of the anellus triangular, tip of phallus slightly swollen dorsally and vesica with a V-shaped cornutus, while A. excreta has a waved saccular process on the left valva, lacks a saccular process on the right valva, the juxta is almost parallel-sided, the right arm of the anellus is curved, the phallus tip is acute and the cornutus is plate-like. In A. jobimi females, the ostium bursae displaced to left and the laterally more thickly sclerotized antrum differ from A. excreta in which the ostium bursae is centrally positioned and the antrum is tridentate. Adaina jobimi can also be separated accurately from the only other representative of the genus in Chile, A. coquimboae . The dark brown spot at base of the cleft is small, not well-defined in A. jobimi , while this spot is distinct and larger in A. coquimboae . In the male genitalia, the distally curved saccular spine and the V-shaped cornutus of A. jobimi differ from the straight saccular spine and absence of a cornutus in A. coquimboae . In the female genitalia, A. jobimi has an inwardly curved anterior apophysis and parallel-sided antrum, while A. coquimboae has a blunt anterior apophysis and gradually narrowing antrum.

Male

(Fig. 1 ). Forewing length 6.8-7.2 mm.

Head. Vertex yellowish brown, appressedly scaled. Frons grayish brown, appressedly scaled. Occiput yellowish brown, narrow erect scales. Labial palpus porrect, yellowish brown; first segment with flat, erect scales, slightly projected below the compound eye; second and third segments with appressed scales. Antenna filiform, yellowish brown dorsally, short cilia ventrally.

Thorax. Yellowish brown, scales appressed. Foreleg yellowish brown, coxa with a wide dark brown longitudinal stripe, femur with two narrow dark brown longitudinal stripes, tibia with a wide dark brown longitudinal stripe, tarsus grayish brown, first tarsomere with a narrow dark brown longitudinal stripe. Midleg yellowish brown, two and one narrow dark brown longitudinal stripes on femur and tibia, respectively, tibial spurs grayish brown, tarsus grayish brown. Hindleg yellowish brown, tibial spurs grayish brown, proximal pair with medial spur slightly longer than lateral one. Forewing dorsum mainly yellowish brown; a small, not well-defined dark brown spot at base of cleft; first lobe with a longitudinal dark brown costal spot at about 1/3 from cleft base to apex, a small dark brown spot at apex and a small dark brown spot at about 2/3 on the anal margin, fringe yellowish brown; second lobe with a small dark brown spot at apex and a few small, not well-defined dark brown spots along the anal margin, fringe yellowish brown. Forewing venter mainly dark brown, changing to yellowish brown on first lobe. Hindwing dorsum grayish brown; fringe yellowish brown. Hindwing venter dark brown. Venous scales dark brown.

Abdomen. Yellowish brown with few scattered grayish brown and dark brown scales.

Male genitalia (Figs 2-5 ). Tegumen bilobed, with distinct sclerotized median sulcus; anterior margin with narrow, rounded projection medially. Uncus narrow, slender, curved, pointed apex, about as long as tegumen. Vinculum narrow. Saccus slightly curved posteriad. Juxta asymmetrical, curved to right, narrower dorsally. Anellus arms asymmetrical; left arm finger-like, slightly swollen near apex with a few short setae and a small apical spine; right arm triangular, slightly longer than left arm, with a few small setae near apex and a small apical spine. Valvae asymmetrical, with a group of long, hair-like scales basally on external side of each valva. Left valva wider than right valva; costal sclerotized band narrow, not reaching apex; apex rounded; saccular process consisting of a well-developed, somewhat bean-shaped basal section with a short triangular cleft and a slender saccular spine; basal third of saccular spine rounded toward ventral margin of valva, medial third almost straight, apically oriented, distal third curved toward costa. Right valva narrower than left valva, costal sclerotized band narrow, not reaching apex; apex rounded; with a small saccular process from a narrow cleft slightly distal to the middle of dorsal margin of sacculus. Phallus cylindrical, curved, tip slightly swollen dorsally, with V-shaped cornutus on vesica.

Female.

Similar to male in size and colouration.

Female genitalia (Fig. 6 ). Papilla analis short, posteriorly rounded, slightly sclerotized, with few short setae. Posterior apophysis (apex of the two posterior apophyses broken during mounting of the only female available for study), narrow, rod-shaped, about four times the length of the papilla analis, apex (when not broken) almost reaches the anterior margin of tergum VIII. Anterior apophysis from anterior vertex of tergum VIII, triangular, slightly shorter than papilla analis, apex inwardly curved, not bifurcate; anterior margin of tergum VIII between anterior apophyses straight. Ostium bursae displaced to left. Antrum parallel-sided, more strongly sclerotized laterally. Ductus bursae membranous, about twice width of antrum. Corpus bursae membranous, elongated, about five times the length of ductus bursae. Ductus seminalis from base of corpus bursae, about four times as long as corpus bursae.

Host plant.

The host plant of A. jobimi is Baccharis alnifolia Meyen & Walp. ( Asteraceae ) (Figs 7 , 8 ). Larval feeding and pupation of A. jobimi both occur in the inflorescences (Figs 9-11 ). This shrub has a narrow geographic range, restricted to the western slopes of the Andes between 3000 and 3800 m elevation in the northernmost part of Chile ( Rodriguez et al. 2018) and southern Peru ( Beltrán et al. 2006). A disjunct population is known from La Libertad Department, northern Peru ( Beltrán et al. 2006).

Distribution.

Adaina jobimi is known only from the type locality, about 2 km south of Socoroma village, at about 3400 m elevation on the western slopes of the Andes of northern Chile (Fig. 12 ).

Etymology.

The name of the new species is dedicated to the memory of the great Brazilian musician Antônio Carlos Brasileiro de Almeida Jobim, best known as Tom Jobim, for his huge contribution to the development of the “Música Popular Brasileira" and his admiration of nature.

Figures

Figure 12. Geographic distribution of the species of Adaina in Chile: A. jobimi sp. nov. (circle) and A. coquimboae Gielis, 2012 (triangles).

Figures 1 - 6. Adult stage of Adaina jobimi sp. nov. 1. Holotype male in dorsal view. 2. Male genitalia, phallus removed. 3. Phallus. 4. Saccular process of left valva (square in Fig. 2). 5. Distal portion of the phallus (rectangle in Fig. 3). 6. Female genitalia; apex of the posterior apophyses broken; only the basal part of the ductus seminalis shown; open arrow indicates limit between ductus bursae and corpus bursae. Scale bars: 1, 0.1, 0.1, 0.1 mm, respectively.

Figures 7 - 11. Natural history of Adaina jobimi sp. nov. 7. Habitat at the type locality. 8. The host plant, Baccharis alnifolia (Asteraceae). 9. Larva shortly before pupation. 10. Dorsal view of pupa. 11. Lateral view of pupal exuvium.