Eutretopsis Norrbom & Prado

Norrbom, Allen L. & Prado, Paulo Inácio, 2006, New genera and host plant records of Asteraceae­feeding Tephritidae (Diptera) from Brazil, Zootaxa 1139, pp. 1-17 : 7-9

Eutretopsis Norrbom & Prado , new genus

Type species. E. albipunctata , new species whitish to hyaline band, but it differs in having the wing base and the alula whitish to hyaline, by lacking setulae medially on the frons, having no parafacial spot or eye markings (both variable but commonly present in Eutreta ), and having the aculeus tip simple. It runs to the “Platensinini” in the key of Foote (1980) but differs from all of the genera included there by its wing pattern as indicated above. It clearly belongs to the Tephritinae , but within this group its relationships are unclear. It may be closest to Acrotaenia and related genera based on its chaetotaxy (nonsetulose frons, acuminate lateral vertical seta, setulose R4+5), head shape, and venation (lobe of cell bcu moderately large).

Description

Head: In lateral view higher than long, nearly oval, frons and face curving together at obtuse angle. Lunule large, 3/4 as long as wide. Frons nonsetulose medially, with 3 frontal setae and 2 reclinate acuminate orbital setae. Medial vertical seta yellowish, acuminate, well developed; lateral vertical seta slightly less than half as long as medial vertical seta, acuminate, yellowish. Postocellar and postvertical setae moderately well developed, whitish, lanceolate. Postocular setae mixed short acuminate and larger lanceolate, both whitish.

Thorax: Setae yellow, acuminate, including postpronotal, 2 notopleural, presutual and postsutural supra­alar, intra­alar, postalar, dorsocentral, acrostichal, 2 scutellar, 2 anepisternal, anepimeral, and katepisternal setae. Dorsocentral seta closer to transverse suture than level of postsutural supra­alar seta. Apical scutellar seta 2/3–3/4 as long as basal seta.

Legs: Hind femur with anterodorsal and posterodorsal preapical setae.

Wing ( Fig. 2 ): Predominantly brown, with numerous small hyaline spots (appearing whitish at some angles due to microtrichia) on central 2/3. Anterior margin brown from apex of vein Sc to beyond apex of vein R2+3. Apex with hyaline to whitish band extending from midway between apices of veins R2+3 and R4+5, extending into cell m; band narrower than solid brown area between it and central area with spots. Posterior margin with 6–7 whitish spots, 3 in anal lobe, 2 in cell cu1, and 1–2 in cell m (spots smaller in Itatiaia female than in other 2 specimens). Base hyaline to whitish, including all of cell bc, subbasal and subapical spots in cell c (sometimes connected posteriorly to form stout Ushaped area), base of cell br to level of humeral costal break, base of cell bm, basal half to most of cell bcu excluding apical lobe, and most of alula. Without bullae. Costal setulae at subcostal break 2.0–2.5 times as long as other costal setulae. Vein R1 dorsally with distinct gap in setulae near bend in vein Sc. Vein R4+5 dorsally evenly setulose to beyond level of apex of R2+3, ventrally setulose to beyond level of r­m. Pterostigma 2 times as long as wide. Lobe of cell bcu 1/2–2/3 as long as width of cell.

Male terminalia: Lateral surstylus simple, in lateral view without posterodorsal lobe. Medial surstylus with 2 stout prensisetae. Base of phallus not swollen and without spines.

Female terminalia: Eversible membrane similar dorsally and ventrally, with short taenia 1/4 length of membrane, and single broad area of moderate sized spicules, largest subbasally, gradually tapering distally. Aculeus tip simple. 2 spermathecae.

Etymology

The name of this genus is derived from the Greek “eu­” (well or very), “tretos” (perforated), and “­opsis” (like or having the appearance of), in reference to its wing pattern and similarity to Eutreta Loew. It is to be treated as feminine in gender.

Figures

FIGURES 1 – 3. Wings: 1, Cipomyia totofusca; 2, Eutretopsis albipunctata; and Lewinsohnia magna.