Euarestoides bimaculatus Savaris & Norrbom,

Savaris, Marcoandre, Norrbom, Allen L., Marinoni, Luciane & Lampert, Silvana, 2019, Revision of the genus Euarestoides Benjamin (Diptera: Tephritidae), Zootaxa 4551 (3), pp. 299-329: 313-314

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Euarestoides bimaculatus Savaris & Norrbom

n. sp.

Euarestoides bimaculatus Savaris & Norrbom  , n. sp.

Figs. 7View FIGURES 2‒13, 22–25View FIGURES 14‒25, 40View FIGURES 38‒43, 46View FIGURES 44‒49, 52View FIGURES 50‒55, 58View FIGURE 58

Diagnosis. This species differs from all other species of Euarestoides in having the ground color of the scutum yellow, two distinct dark spots within the stellate mark in cell r 4+5; and the glans with two large spines at the base. It differs from the other species except E. rionegrensis  in lacking a complete darker border on the anterodistal margin of the reticulate area between the pterostigma and crossvein r-m. It further differs from E. rionegrensis  in having the medial prensiseta curved ( Fig. 40View FIGURES 38‒43), the acrophallus without a large apical lobe ( Fig. 52View FIGURES 50‒55), and the aculeus with the lateral margin nonserrate ( Fig. 24View FIGURES 14‒25).

Description. Body length 2.70–2.85 mm, yellow in ground color. Setae generally pale brown to brown.

Head: Slightly higher (0.70–0.75 mm) than long (0.48–0.53 mm). Generally yellow, frons yellow to orange, ocellar tubercle brown to dark brown, and occiput brown medially and with brown mark sublaterally extended nearly to vertical seta. Frons length (0.32–0.40 mm) less than width at vertex (0.46–0.48 mm), slightly narrowed to anterior margin (0.36–0.46 mm). Gena with few small setulae mixed acuminate dark and lanceolate yellowish on middle and ventral margin; genal seta acuminate, pale brown; gena height to eye long diameter ratio 0.23–0.24. Eye ovoid, long diameter 0.54–0.58 mm, width 0.48–0.49 mm. Antenna testaceous yellow, first flagellomere as long as wide. Maxillary palpus pale brown at apex with 3 distinct acuminate setulae.

Thorax: Length 1.21–1.26 mm, ground color of scutum and scutellum yellow.

Wing ( Fig. 7View FIGURES 2‒13): Length 2.98–3.10 mm, width 1.10–1.18 mm. Area between pterostigma and crossvein r-m pale brown to gray reticulate with relatively small hyaline spots, without or with very faint, incomplete, darkened border along anterodistal margin. Pterostigma with basal half subhyaline or yellowish and apical half brown. Cell r 1 with 3 rays in marginal part, most proximal ray narrow, distal two rays broad, most distal as broad as or subequal to subapical ray; rays bordering 3 marginal hyaline marks: largest immediately distad of pterostigma, oblique and reaching to or almost to vein R 4+5; second mark triangular, usually reaching vein R 2+3; and small triangular subapical mark reaching vein R 2+3. Cell r 2+3 with 2 marginal hyaline marks (with complete or incomplete medial dark ray). Cell r 4+5 with apical rays complete, narrowly apically (slightly wider distally than basally); with 2 distinct medial dark spots bordering vein R 4+5 within the subapical stellate mark; subbasal hyaline spot near anterior end of crossvein dm-m small, no more than half width of cell. Cells br, bm, cu a, dm, and m 4 and anal lobe pale brown to gray reticulate, hyaline spots relatively small, markings connected. Dark ray over crossvein dm-m and 2 dark rays crossing cell m 1 all reaching posterior wing margin. Basal marginal hyaline mark in cell m 1 reaching vein M 1 (first ray and ray on dm-m not connected). Halter mostly yellow, with apex darker.

Legs: Entirely yellow.

Abdomen: Ground color yellow.

Female terminalia: Oviscape yellow, length 0.71 mm, width 0.56 mm at base and 0.20 mm at apex; with evenly distributed white setulae. Eversible membrane ( Fig. 22View FIGURES 14‒25) length 0.71 mm. Aculeus ( Fig. 23View FIGURES 14‒25) pale brown, length 0.72 mm, with lateral margin nonserrate; tip ( Fig. 24View FIGURES 14‒25) triangular, length 0.16 mm. Spermathecae ( Fig. 25View FIGURES 14‒25) elongate, length 0.14 mm.

Male terminalia: Medial surstylus with prensisetae equal and medial prensiseta distinctly curved ( Fig. 40View FIGURES 38‒43). Phallapodeme 0.58 mm long, mostly dark brown. Glans 0.32 mm long, with 2 large spines at base ( Fig. 52View FIGURES 50‒55); acrophallus without apical lobe; vesica very short.

Distribution. Neotropical. Peru (Cusco) ( Fig. 58View FIGURE 58). The type series was collected at altitudes of 2849-3296 m.

Biology. This species has not been reared, but two of the type specimens were collected on Baccharis boliviensis (Wedd.) Cabrera ( Astereae  ). Adults have been collected in January and June.

Type data. The holotype male is labeled “ PERU: Cusco: Ollantaytambo, E of, WP 665, 13.26707°S ” / “ 72.22823°W, 2849 m, on Baccharis boliviensis (12-PE-36), 8 Jun 2012; A. L. Norrbom & B. D. Sutton ” / “ HOLOTYPE ♂ Euarestoides bimaculatus Savaris & Norrbom  ” [red] / “ USNMENT00744412 ” [plastic bar code label]. It is double mounted (minuten), is in excellent condition, and is deposited in the MHNJPGoogleMaps  . Paratypes: PERU: Cusco: Carretera Manu , dirt side road, ravine, WPB-34, 13.57279°S 71.70208°W, 3296 m, 28 Jan 2013; A. L. Norrbom, G. J. Steck & B. D. Sutton, 1♂ ( USNM USNMENT 00875891)GoogleMaps  ; Ollantaytambo , E of, WP 665, 13.26707°S 72.22823°W, 2849 m, on Baccharis boliviensis (12-PE-36), 8 Jun 2012; A. L. Norrbom & B. D. Sutton, 1♀ ( USNM USNMENT00744411)GoogleMaps  .

Etymology. The species epithet is a Latin adjective referring to the two spots within the stellate mark in cell r 4+5.