Pelecinobaccha squamagula

Miranda, Gil Felipe Gonçalves, Marshall, Stephen A. & Skevington, Jeffrey H., 2014, Revision of the genus Pelecinobaccha Shannon, description of Relictanum gen. nov., and redescription of Atylobaccha flukiella (Curran, 1941) (Diptera: Syrphidae), Zootaxa 3819 (1), pp. 1-154 : 70-72

Pelecinobaccha squamagula Miranda sp. nov.

Map 7. Figure 14 .

Type locality. Brazil, Santa Catarina, Nova Teutônia, 300–500m, 27°11'S 52°23'W. Holotype female CNC.

Male. Head: Black. Face with lateral ¼ pale. Gena dark red. Lunule with small pale area above antennal insertions, usually very reduced. Frontal triangle usually wholly black, some specimens pale on ventro-lateral ¼, brown pollen restricted to median rectangular area, white-silver pollen continuous from face restricted to lateral margin except around eye contiguity. Vertical triangle with 3 rows of pile, but most pile concentrated in a single median row; ocellar triangle separated by its length from posterior eye margin. Eye contiguity shorter than vertical triangle length. Eye with posterior indentation at level of antennal insertion. Antennal insertions almost separated, division weakly sclerotized dorsally. Antenna dark red to dark brown. Dorsal ¼ of occiput with 2 rows of simple black pile, anterior row shorter, middle ½ with 3–4 rows of white, scale-like pile, anterior rows shorter and some pile black; ventral ¼ with 2–3 rows of white, scale-like pile.

Thorax: Scutum black, mostly dull pollinose and with weak pair of sub-median vittae of white pollen; scutum mostly black pilose, except usually white pilose anterior to callus of transverse suture, and notopleuron with longer pile; scutum anterior row of shining white pile with shorter pile in the middle. Scutellum dark brown, with long, black pile, subscutellar fringe pile long and black. Pleuron black and mostly white pilose except black posterodorsally on posterior anepisternum and anterior anepimeron. Plumula long and white. Calypter white. Halter yellow, capitulum yellow to light orange.

Wing: Hyaline with dark anterior margin (dark on cells bc, c, sc, and diffusely on basal ⅓ of r1), entirely microtrichose; alula normal, basally 2 times to apically 4 times as broad as c cell, hyaline, entirely microtrichose.

Legs: Proleg dark brown, apex of profemur and basal ⅓ to ½ of protibia pale. Mesoleg dark brown, apex of mesofemur and basal ½ to ⅔ of mesotibia pale. Metaleg black, basal ¼ to ⅓ of metatibia pale, metatarsus entirely black.

Abdomen: Black; 3.2 times as long as thorax. First tergite with white pile basally, dorsally and ventrally, otherwise pile black; mainly white pilose in some specimens. Second tergite long, length 2.8 times minimum width, and with subapical central triangular region of dull black pollen; 2nd tergite with long, erect and black pile, except white on baso-lateral ½, and shorter and appressed dorsally. Third tergite trapezoidal, length1.6 times minimum width, and pale on baso-lateral ⅔ of the tergite margin; 3rd tergite with large central triangular region of dull black pollen, this region with a small medial indentation on posterior margin, and with appressed and black pile, slightly longer and white baso-laterally. Fourth tergite rectangular and wide, pale on basal ½ of the tergite lateral margin, and with dull pollinose region with longer indentation than on 3rd tergite; remaining characteristics as on 3rd tergite. Fifth tergite rectangular and wide, entirely dark brown, and dull black pollen restricted to tree central vittae; remaining characteristics as on 4th. Genitalia: Cercus with 1 regular row of pile on medial margin and 3 regular rows on lateral margin. Surstylus long, directed anteriorly, with setulae (around 16) concentrated ventrally on apex, pilose on basal ½ of the dorsal surface. Subepandrial sclerite weakly sclerotized medially, with posterior margin slightly concave and apical margin notched. Hypandrium with ventral notch extending to anterior ⅔. Distiphallus smooth, anterior surface straight. Postgonite with pile mainly on ventral surface, and ventral surface straight and baso-ventrally extended, and dorsal surface concave; postgonite apex slightly convex anteriorly, with slightly convex ventral extremity and acute dorsal extremity.

Female: Like male except: Frons pale laterally on ventral ½. Ocellar triangle ~2 times its length from posterior eye margin and ~1.5 ocelli-width from lateral eye margin. Scutum pile shorter, and all white on whole notopleuron. Scutellum with mainly white pile, subscutellar fringe pile red to black. Pleuron pile all white. Wing might also be dark on cell r, basal ½ of r1 and basal 1/5 of r2+3. First abdominal tergite mainly white pilose. Pale regions on 3rd and 4th tergite sometimes triangular in shape. Fifth tergite with almost whole lateral margin pale. Fourth tergite dull pollinose region narrower and sometimes divided into a pair of large fasciate maculae. Sixth segment conical normal, slightly shorter than its smallest width and as long as the 5th. Genitalia: 7th tergite with triangular apex, basal extensions as long as the 6th segment; 7th segment lateral sclerite rectangular. Eighth tergite central region unsclerotized appearing as reduced to a pair of sclerites, basal crest large. Tenth tergite reduced to a weakly sclerotized strip, fused baso-ventrally to cercus. Cercus with one row of pile on apical margin.

Length. 7–10.5mm; wing 5.5–7.5mm.

Distribution. Bolivia (Beni), Brazil (Santa Catarina), Colombia (Cundinamarca).

Primary type. Holotype: Female in good condition, with left proleg and genitalia dissected and placed in individual plastic tubes pinned with the specimen. Holotype labels: ‘Nova Teutônia // 27°11'S, 52°23'W // Brazil, 300–500m // XI.1969 [handwritten] // Fritz Plaumann’ ‘ Holotype // Pelecinobaccha // squamagula // Miranda’ [red label] ‘CNC Diptera // # 161166 ’;

Paratypes. BOLIVIA. Beni, Rurrenabaque, 175m, 10–23 Oct 1956, L. E. Pena (1 ♀, CNC Diptera 161165). BRAZIL. Santa Catarina, Nova Teutônia, 300–500m, 27°11'S 52°23'W, Dec 1966, Nov 1969 & Oct 1970, F.

Plaumann (5 ♂, CNC Diptera 161160 –4, 1 ♀, USNM). COLOMBIA. [Cundinamarca], Anapoima, predator Ceroplastes on Maracuyá, 79-503, Nov 1978, I. Cure & L. Nuñez (2 ♂, USNM ENT 0 0 257684 &...686, 2 ♀, USNM ENT 0 0 257668 & ...681).

Comments. Four of the specimens examined (USNM ENT 0 0 257668, 0 0 257681, 0 0 257684 and 00257686) were reared with Ceroplastes sp. ( Hemiptera , Coccidae ) on passion fruit.

Etymology. The specific epithet means ‘appetite for scales’. It is to be treated as a noun in apposition.

Figures

FIGURE 14. Pelecinobaccha squamagula sp. nov. a – e. Holotype: a – d. Female genitalia: a. 7 th tergite, dorsal. b. Apex, dorsal. c. 7 th segment, lateral. d. Apex, lateral. e. Habitus, dorsal. f – i. Male genitalia: f. Subepandrial sclerite, ventral. g. Epandrium, lateral. h. Hypandrium, lateral. i. Hypandrium, ventral. 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus.