Pelecinobaccha seara

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 : 69-70

Pelecinobaccha seara Miranda sp. nov.

Map 8. Figure 38 (a–d).

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

Male. Head: Dark brown. Face pale on lateral ¼. Lunule pale above antennal insertions, central maculae connected by a median dark vittae to frontal triangle color. Frontal triangle pale laterally, white-silver pollen continuous from face restricted to lateral margin. Vertical triangle long, with median single row of pile, ocellar triangle separated by its length from posterior eye margin. Eye contiguity as long as vertical triangle length. Eye with posterior indentation at level of antennal insertion. Antennal insertions confluent. Dorsal ¼ of occiput with 2 rows of simple black pile, anterior row with very short pile; middle ½ with 2–4 rows of white scale-like pile, posterior row longer, with some simple black pile on anterior row; ventral ¼ with 2–3 rows of scale-like white pile.

Thorax: Scutum dark brown, usually pale on notopleuron anterior to transverse suture, and with weak pair of sub-median vittae of concentrated pollen; scutum mainly black pilose, except white and slightly longer on notopleuron, and with anterior row of shining white pile slightly interrupted in the middle. Scutellum dark brown, white pilose, subscutellar fringe pile long and white. Pleuron white pilose and dark brown, usually pale on posterior ½ of posterior anepisternum and dorso-posterior of katepisternum. Plumula yellow. Calypter light yellow. Halter brown.

Wing: Entirely dark, entirely microtrichose; alula infuscated, basally 1.6 times to apically 2.4 times as broad as c cell, entirely microtrichose.

Legs: Proleg brown, slightly lightened on lateral surface of profemur and basal ⅔ of protibia. Mesoleg brown, other characteristics similar to proleg. Metaleg dark brown, apex of metafemur and basal ⅓ of metatibia slightly lightened, apex of metabasitarsomere and other metatarsomeres pale.

Abdomen: Dark brown; ~4 times as long as thorax. First tergite with white pile basally, dorsally and ventrally, otherwise pile black. Second tergite long, length ~4.5 times minimum width, pale on most of the baso-lateral ⅔; 2nd tergite with long rectangular maculae of dull black pollen medially extending latero-subapically, and with mainly appressed black pile, longer laterally. Third tergite trapezoidal and long, length ~3.5 times minimum width, with baso-lateral pale triangles, some specimens with pair of central vittate maculae; 3rd tergite with large triangular macula of dull black pollen medially, and with appressed and black pile. Fourth tergite rectangular and long; remaining characters as on 3rd. Fifth tergite rectangular and wide, baso-lateral margin slightly lightened; remaining characteristics as on 4th. Genitalia: Cercus with 1–2 rows of pile on medial margin and 3 rows on lateral margin. Surstylus long, directed apicoventrally, with a few setulae (around 6) ventrally on apex, pilose on basal ½ of the dorsal surface. Subepandrial sclerite sub-quadrate widening basally, with a shallow concave basal margin. Hypandrium with ventral notch extending to anterior ⅔. Distiphallus smooth and anterior surface straight. Postgonite with pile mainly on baso-ventral surface, ventral surface straight, slightly convex basally, dorsal surface straight; postgonite apex straight anteriorly, ventral extremity convex expanded apicoventrally, dorsal extremity acute.

Female: Female unknown.

Length. 14–15.5mm; wing 12–12.5mm.

Distribution. Brazil (Santa Catarina).

Primary type. Holotype: Male in good condition except left mesoleg missing and head slightly collapsed at level of eye indentation. Left proleg and genitalia dissected and placed in individual tubes pinned with the specimen. Holotype labels: ‘Nova Teutonia // 27°11'S, 52°23'W // Brazil, 300– 500m. // 2.X.1961 // Fritz Plaumann’ [date handwritten] ‘CNC Diptera // # 161186 ’ ‘ Holotype // Pelecinobaccha // seara // Miranda’ [red label].

Paratypes. BRAZIL. Santa Catarina, Nova Teutônia, 300–500m, 27°11'S 52°23'W, 24 Oct 1961 & Nov 1969 (2 ♂, CNC Diptera 161185 & 161187).

Comments. The males are somewhat similar to the male of P. peruviana but the disposition of the white pollen on the frontal triangle, the shape of the 3rd abdominal segment, the presence of weak abdominal pale vittae and the disjunct distribution of P. seara (Santa Catarina, Brazil) distinguishes it from P. peruviana .

Etymology. The specific epithet refers to the municipality where Nova Teutônia is located, which is where Fritz Plaumann lived and collected most of his life. It is to be treated as a noun in apposition.

Figures

FIGURE 38. a – d. Pelecinobaccha seara sp. nov.: a. Habitus, dorsal. b – d. Holotype, male genitalia: b. Lateral. c. Ventral. d. Epandrium, ventral. e – h. Pelecinobaccha tica sp. nov., holotype: e – g. Female genitalia: e. 7 th tergite, dorsal. f. Apex, dorsal. g. Lateral. h. Habitus, dorsal. 7 tg: 7 th tergite, 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus, s scl: subepandrial sclerite.