Trupanea trivittata Norrbom & Neder

Norrbom, Allen L. & Neder, Lilia Estela, 2014, New neotropical species of Trupanea (Diptera: Tephritidae) with unusual wing patterns, Zootaxa 3821 (4), pp. 443-456 : 454-455

Trupanea trivittata Norrbom & Neder , new species

Figs. 6 , 13–14 , 18 , 23–24

Diagnosis. This species is distinguished from all other species of Trupanea by the wing with isolated dark brown marks in the middle of cell c and the base of cells bm and bcu, the scutum with 3 brown vittae, the frons with 2 submedial nonmicrotrichose orange vittae, and the first flagellomere dark brown. In wing pattern it resembles some species of Euaresta , but can be easily distinguished from them by chaetotaxy (more than 2 frontal setae, only one pair of scutellar setae).

Description. Small, body length 3.5 mm. Wing length 4.0 mm.

Head ( Figs. 13–14 ): Yellow to orange except ocellar tubercle and medial part of occiput bluish gray; mostly microtrichose. Frons nonsetulose medially; lateral margins and medial vitta grayish microtrichose; with 2 broad submedial vittae orange, shiny, nonmicrotrichose. 4 frontal setae brown, acuminate, relatively short, longest (posterior) seta less than half width of frons at level of seta; 2 reclinate orbital setae, anterior seta brown, acuminate, posterior setae short, white, slightly lanceolate; ocellar seta well developed, less than half width of frons at level of anterior ocellus; postocellar, lateral vertical, and postocular setae, and most setulae on postgena white, lanceolate; facial ridge setulae brown acuminate; genal setulae yellow or brown, acuminate. Antenna orange except entire first flagellomere dark brown; arista minutely pubescent. Palpus relatively slender, apical half brown.

Thorax ( Fig. 18 ): Mostly dark brown and densely microtrichose giving bluish gray appearance. Postpronotal lobe and notopleuron partly orange. Scutum with 3 distinct, narrow, dark brown vittae (1 medial, pair on dorsocentral lines). Anepisternum diffusely darker brown posterodorsally. Following setae well developed, brown, acuminate: postpronotal, anterior notopleural, presutural and postsutural supra-alar, intra-alar, postalar, dorsocentral (aligned very close to transverse suture), acrostichal, 1 (basal) scutellar, and 1 anepisternal, anepimeral and katepisternal. Posterior notopleural seta short, white, lanceolate. Setulae on postpronotal lobe, propleuron, scutum, scutellum laterally, anepisternum, katepisternum, and anepimeron white, lanceolate.

Legs: Mostly yellow. Fore femur anterodorsally on basal half, and hind femur anteroventrally on basal half brown. Male fore tibia and tarsus ( Figs. 23–24 ) with most dorsal setulae erect. Male fore basitarsus 3 times as long as high (measured on medial side), 2.4 times height of tibia apically; subbasally with 3 posteroventral setae, slightly longer than height of basitarsus, projecting perpendicularly, and with cluster of anteroventral setae, almost as long as basitarsus, projecting obliquely. Mid femur with anterior row of brown setae on basal two-thirds, larger and more perpendicular than setulae; in male with row of well developed brown anteroventral setae on distal threefourths.

Wing ( Fig. 6 ): Crossvein r-m at 0.73 distance from bm-cu to dm-cu on vein M. Node of Rs ventrally with single setula on right wing; veins R2+3 and R4+5 otherwise without setulae dorsally or ventrally. Pattern mostly hyaline, with following brown markings: small pale brown mark across base of cell c and larger quadrate dark brown spot across middle of cell; narrow mark covering node of Rs; quadrate mark on basal half of cell bm, extending midway across adjacent parts of cells br and bcu; large rectangular mark covering pterostigma, extended posteriorly across cells r1 and r2+3 to midway across cell br; quadrate marginal mark at middle of cell r1; inverted Tshaped mark on crossvein r-m and vein M, with narrow connection across cell br to mark on pterostigma, across cell dm to marks on vein Cu1, and along vein M to subapical stellate mark; 3 marks along vein Cu1, including basal mark covering most of crossvein bm-cu and base of cell cu1, narrowly connected in cell cu1 to medial mark which extends more narrowly into middle of cell dm and also narrowly and obliquely posteriorly to wing margin, and quadrate distal mark on posterodistal corner of cell dm, extending to wing margin at apex of vein Cu1, and with narrow anterior connections along dm-cu and subapically to markings on vein M, isolating apical hyaline spot; modified subapical stellate mark, broadly extended to costa in apical fourth of cell r1 and middle of cell r2+3, isolating small ovoid hyaline spot distal to apex of vein R2+3, with 2 rays across cell m, and with broad ray to apex of vein M that extends anteriorly along wing margin, narrowly reaching apex of vein R4+5, but without another ray from stellate mark directly to apex of R4+5.

Abdomen: Tergites entirely dark brown, entirely gray microtrichose. Setulae white, acuminate.

Male terminalia: Not dissected, but phallus everted. Glans membranous except for projecting, hooklike sclerite near base.

Biology. Nothing is known of the host plants or other aspects of the biology of this species.

Distribution. Trupanea trivittata is known only from the type locality in Catamarca, Argentina.

Type data. Holotype ♂ ( IML, USNMENT 00654434), ARGENTINA: Catamarca: 25 kms. de Fiambal, Loro Huasi, 21 Jan 1969, A. Terán & A. Willink.

Etymology. The name of this species is an adjective referring to the three brown stripes on the scutum.

Comments. The holotype is in fair condition. The setulae on the scutum are largely abraded, and some thoracic setae are broken or missing. The posteroapical quarter of the right wing and anal lobe of the left wing are missing.

Figures

FIGURES 1 – 6. 1, Habitus, lateral, female, T. polita (Bolivia: Pongo, USNMENT 00056032). 2 – 6, Wing: 2 – 3, T. dimorphica (Argentina: Jueya, male, USNMENT 00050051; female, USNMENT 00050050); 4, T. fasciata (Argentina: Barrios S. La Quiaca, male, USNMENT 00744480); 5, T. polita (Bolivia: Pongo, female, USNMENT 00055986); 6, T. trivittata (Argentina: Loro Huasi, male, USNMENT 00654434).

FIGURES 7 – 14. Head: 7, T. dimorphica, male (Argentina: Jueya, USNMENT 00050051); 8, T. dimorphica, female (Argentina: Jueya, USNMENT 00050050); 9 – 10, T. fasciata, male (Argentina: Barrios S. La Quiaca, USNMENT 00744480); 11 – 12, T. polita, female (Bolivia: Pongo, USNMENT 00055986, USNMENT 00056032); 13 – 14, T. trivittata, male (Argentina: Loro Huasi, USNMENT 00654434).

FIGURES 15 – 18. Thorax, dorsal: 15, T. dimorphica, female (Argentina: Jueya, USNMENT 00050050); 16, T. fasciata, male (Argentina: Barrios S. La Quiaca, USNMENT 00744480); 17, T. polita, female (Bolivia: Pongo, USNMENT 00055986); 18, T. trivittata, male (Argentina: Loro Huasi, USNMENT 00654434).

FIGURES 19 – 24. Male fore leg: 19 – 21, T. dimorphica, right leg, posterior, dorsal and anterior (Argentina: Jueya, USNMENT 00050051); 22, T. fasciata, left leg, posterior (Argentina: Barrios S. La Quiaca, USNMENT 00744480); 23 – 24, T. trivittata, left leg, posterior and dorsal (apical 2 tarsomeres missing) (Argentina: Loro Huasi, USNMENT 00654434).