Anastrepha triangularis Norrbom, 2021

Norrbom, Allen L., Muller, Alies, Gangadin, Anielkoemar, Sutton, Bruce D., Rodriguez, Erick J., Savaris, Marcoandre, Lampert, Silvana, Rodriguez, Pedro A., Steck, Gary J., Moore, Matthew R., Nolazco, Norma, Troya, Henry, Keil, Clifford B., Padilla, Anabel, Wiegmann, Brian M., Cassel, Brian, Branham, Marc & Ruiz-Arce, Raul, 2021, New species and host plants of Anastrepha (Diptera: Tephritidae) primarily from Suriname and Pará, Brazil, Zootaxa 5044 (1), pp. 1-74 : 40-41

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Anastrepha triangularis Norrbom

new species

Anastrepha triangularis Norrbom , new species

Figs. 16 View FIGURES 15–16 , 68 View FIGURES 67–73 , 96 View FIGURES 92–97 , 112 View FIGURES 98–120 , 140 View FIGURES 132–144

Diagnosis. Anastrepha triangularis can be distinguished from other species of Anastrepha by the following combination of characters: Setae orange brown to red brown; scutum entirely microtrichose; mediotergite and subscutellum entirely orange; C-band and S-band connected, hyaline area extended anteriorly to vein R 4+5; vein M 1 weakly curved apically, cell r 4+5 at apex 1.16 times as wide as at level of dm-m; oviscape 5.76 mm long, 1.56 times as long as mesonotum; aculeus 5.55 mm long; tip 0.20 mm long, 0.12 mm wide, with distal 0.90 triangular, with margins straight and distinctly serrate. It resembles A. superflua Stone in wing pattern and venation, but differs in having the facial carina concave or flat dorsally, shorter terminalia, and the aculeus tip shorter and more serrate. It resembles A. barrettoi Zucchi in aculeus tip shape, but differs in having the V-band complete and longer terminalia (oviscape 4 mm long, 1.33 times as long as mesonotum, aculeus 3.75 mm long in A. barrettoi ). In the key of Zucchi et al. (2011) it runs to A. duckei Lima, but differs in having longer terminalia and a shorter, more serrate aculeus tip (oviscape 3.9 mm long, as long as mesonotum, aculeus tip 0.37 mm long, with distal 0.59 serrate in A. duckei ).

One sequence of A. triangularis ( MT672221 View Materials ), from the holotype from Berg en Dal, Suriname, was included in the COI barcode analysis of Moore et al. (in prep.). The smallest interspecific K2P distance, with A. superflua , was relatively large (9.9%).

Description. Mostly yellow to orange. Setae dark orange, except those on frons red brown.

Head: Yellow to orange except brown ocellar tubercle. 3 frontal setae; 2 orbital setae, posterior seta well developed. Ocellar seta weak, 1.2 times as long as ocellar tubercle. Facial carina, in profile, concave on dorsal two-thirds. Antenna not extended to ventral facial margin. Palpus in lateral view dorsally curved, evenly setulose.

Thorax: Mostly yellow to orange, most of scutum orange; with following areas white to pale yellow: postpronotal lobe and lateral margin of scutum bordering it; medial scutal vitta, ovoid posteriorly, extending laterally slightly beyond acrostichal seta; sublateral scutal vitta from transverse suture to posterior margin, including base of intra-alar seta; scutellum; dorsal margins of anepisternum and katepisternum; katepimeron; and most of anatergite and katatergite. Scuto-scutellar suture without brown spot medially. Subscutellum and mediotergite entirely orange. Mesonotum 3.70 mm long. Postpronotal lobe, notopleuron, scutum and scutellum entirely microtrichose; scutal setulae orange, evenly distributed sublaterally. Chaetotaxy typical for genus. Katepisternal seta orange, approximately half diameter and two-thirds length of anepisternal seta.

Legs: Entirely yellow to orange.

Wing ( Fig. 68 View FIGURES 67–73 ): Length 8.04 mm, width 3.50 mm, ratio 2.30. Apex of vein R 1 at 0.54 wing length, proximal to level of anterior end of crossvein r-m. Cell c 1.19 times as long as pterostigma; pterostigma 3.41 times as long as wide. Vein R 2+3 slightly sinuous. Crossvein r-m at 0.65 distance from bm-m to dm-m on vein M 1. Vein M 1 weakly curved apically; cell r 4+5 at apex 1.16 times as wide as at level of dm-m, 0.98 times as wide as maximum subapical width. Cell cu a with distal lobe moderately long, length of cu a 1.67 times as long as anterior margin, lobe 0.90 times as long as vein CuA+CuP. Wing pattern mostly orange and moderate brown. C-band mostly orange, cells bc and c slightly paler, pterostigma mostly orange brown, distal margin in cells r 1 and r 2+3 narrowly brown, with small ovoid dark brown spot on fork of vein Rs, and with elongate faint brown marking in cell br opposite cell bm and with posterior margin of band in cell br narrowly brown. C-band and S-band connected along vein R 4+5; hyaline marginal spot in cell r 1 subquadrate, with apex aligned proximal to anterior end of crossvein r-m. Basal hyaline area in cell dm relatively small. Basal half of S-band relatively broad, mostly orange, anterobasal margin mostly narrowly brown in cells r 1, r 2+3 and br, posterodistal margin mostly narrowly brown, but more broadly posteriorly in cell m 4 extending almost to apex of lobe of cell cu a, without incision in cell m 4; distal section mostly orange, with posterior margin in cells r 2+3 and r 4+5 moderate brown; relatively broad, at apex of vein R 2+3 0.68 times width of cell r 2+3, not extended to apex of vein M 1, without marginal hyaline areas; hyaline area proximal to apex of band extended to vein R 2+3. V-band with proximal arm relatively narrow, brown posteriorly, orange in cell r 4+5, except proximal margin, and bordering crossvein dm-m; separated from S-band along vein R 4+5; on posterior margin extended slightly more than two-thirds distance to vein CuA+CuP; distal arm slender, brown except central part in cell r 4+5, connected to proximal arm; hyaline area between arms of V-band and vein M 1 less than one-third width of cell cell r 4+5.

Abdomen: Mostly orange, without brown markings.

Female terminalia: Oviscape 5.76 mm long, 1.56 times as long as mesonotum; entirely orange; spiracle at basal 0.24. Eversible membrane ( Fig. 96 View FIGURES 92–97 ) with dorsobasal denticles in subtriangular pattern, with approximately 35 relatively short hooklike denticles in 4 V-shaped rows, 20 denticles in medial 3 rows larger than those in lateral row. Aculeus ( Fig. 112 View FIGURES 98–120 ) slightly ventrally curved in lateral view, 5.55 mm long, 0.96 times oviscape length; in ventral view base slightly expanded, triangular, 0.25 mm wide, shaft 0.13 mm wide at midlength; tip ( Fig. 140 View FIGURES 132–144 ) 0.20 mm long, 0.04 times aculeus length, 0.12 mm wide, 1.67 times as long as wide; in ventral view parallel-sided basally, distal 0.90 triangular, sides straight (not concave), distinctly serrate; 0.07 mm wide in lateral view, 0.58 times ventral width. Spermathecae not examined.

Distribution. Anastrepha triangularis is known only from Suriname, where it was collected only at Berg en Dal.

Biology. The host plants and other aspects of the biology of this species are unknown.

Type data. Holotype ♀ ( USNM, USNMENT00875026 ), SURINAME: Brokopondo: Berg en Dal, Bergendal Resort , [trail to top of hill, 70 m before junction with trail along river, 5.14279°N 55.06849°W, 28 m,] trap BD-ML- 21, [9–] 22 Jun 2016, A. Muller. GoogleMaps

Etymology. The name of this species is a Latin adjective meaning triangular, in reference to the shape of the aculeus tip.

Comments. This species appears to be most closely related to A. superflua Stone , and these two species are here placed in the newly recognized superflua species group. In the COI analysis of Moore et al. (in prep.), the single sequence of A. triangularis runs closest to A. superflua . These two species are also similar in wing pattern and in having vein M 1 weakly curved apically and the aculeus tip serrate, although the facial carina in A. triangularis is not produced as in A. superflua .


Smithsonian Institution, National Museum of Natural History