Pelecinobaccha andrettae

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 : 22-24

Pelecinobaccha andrettae Miranda sp. nov.

Map 8. Figure 18 (a–g).

Type locality. Ecuador, Napo, Jatun Sacha Biol. Res., 6 km E Misahuali, ~ 450m, 1°4'S 70°36'W. Holotype female QZAZ.

Male. Head: Black. Face with pale lateral ¼, with white pollen laterally until the middle level of the frontal prominence. Lunule sometimes with slightly lightened, curving towards middle, vittae dorsal to antennal insertions that almost join dorsally and leave a darker central macula. Frontal triangle black pilose, with pair of triangular maculae of silvery-white pollen centro-laterally. Vertical triangle with most black pile forming a central single row ending dorsal to anterior ocellus; ocellar triangle ~1.5 times its length from posterior eye margin. Eye contiguity 1–1.5 times as long as vertical triangle length. Eye with sub-triangular indentation on posterior margin slightly dorsal to level of antenna insertion. Antennal insertions confluent. Antenna dark red to black. Dorsal ¼ of occiput with 2 rows of simple black pile, anterior row very short, middle 2⁄4 with 1–2 anterior rows of simple long black pile and 1 regular posterior row of very long non-tapering scale-like white pile; ventral ¼ with 2–3 irregular rows of tapering scale-like white pile.

Thorax: Prothorax black. Scutum black, dull brown-pollinose with inconspicuous sub-median anteroposterior pair of sparse pollinose vittae and semi oval macula of differently oriented pollen anterior to scutellum; scutum with white (variation) or black erect pile, longer on the notopleuron anterior to the transverse suture, and longer, densely arranged and posteriorly oriented laterally from above the wing base to the callus; scutum anterior row of shining white pile interrupted in the middle. Scutellum dark red to black, dull pollinose, sparse black pilose, subscutellar fringe pile long and black or white (variation). Pleuron black, with sparse white pollen and entirely white pilose (variation) except some specimens with black pile on anterior anepisternum and some dorsoposteriorly on the posterior anepisternum, and with dark red pile on anterior anepimeron. Plumula golden. Calypter gray with black margin, short black pile on dorsal lobe and long black pile on ventral lobe. Halter yellow to black, capitulum light yellow.

Wing: Hyaline except for dark brown basal ½ (cells bc, c, sc, basal ½ of r1, base of r2+3, small basal portion of r4+5, r, bm, base of dm, basal ½ of cua1 and most of cu p except for a sometimes paler posterior margin), entirely microtrichose; alula brown, large, basally 2 times to apically 2.5 times as broad as c cell, entirely microtrichose.

Legs: Proleg reddish brown, procoxa darker on basal ⅔, apex of profemur slightly lighter. Mesoleg reddish brown; black pilose, mesocoxae with only 1 row of longer pile antero-apically, bare to sparse pile ventrally on mesotrochanter, bare ventrally and with a row of long pile laterally on mesofemur, mesotibia with ventro-apical black setae. Metaleg dark brown, white from apical ¼ (variation) or ½ of metabasitarsomere to apical metatarsomere; black pilose, white on white regions, distinctly longer on metacoxa, sparse ventrally on basal ½ of metafemur; metabasitarsomere thick and long, other metatarsomeres decrease in size.

Abdomen: Black; ~4 times as long as thorax. First tergite short, with narrow lateral lobes, shiny; 1st tergite with long black and white pile laterally, and black sparse pilose to bare medially, and sometimes entirely white pilose (variation). Second tergite slightly constricted medially and long, length ~5 times minimum width; 2nd tergite with subapical dull black-pollinose triangular region, and black pilose, pile long and erect laterally and short and appressed dorsally. Third tergite trapezoidal, ~3 times wider apically than basally, with large central dull black pollinose triangle, and with appressed black pile. Fourth tergite sub-quadrate, with one median or a pair of submedian dull black pollinose triangles; remaining characteristics as on 3rd. Fifth tergite wider than long and dull pollinose basally extending slightly apically through 3 central vittae; remaining characteristics as on 3rd. Genitalia: Small. Epandrium notched posteriorly, densely microtrichose. Cercus with 1 to 2 regular rows of pile on medial margin, 3 irregular rows of pile on lateral margin, densely microtrichose. Surstylus directed forward, with 5 irregular rows of setulae on ventral, slightly concave side, setulae weaker basally, long pilose on dorsal surface. Subepandrial sclerite with a pair of posteriorly directed short processes, lateral margin darker, apical central portion directed dorsally and detached from the processes connected to the base of the surstyli. Hypandrium with ventral notch on anterior ⅔. Distiphallus smooth and dorsal surface slightly concave. Phallapodeme tapering dorsoventrally on basal ⅓. Postgonite sparsely pilose except bare on apex, pile longer baso-ventrally, ventral surface slightly concave; postgonite apex rounded ventrally, convex anteriorly and acute dorsally.

Female: Like male except: Frons with brown pollen medially from dorsal ½ to vertex. Vertex central row with shorter pile; ocellar triangle ~2.5 times its length from posterior eye margin and ~1 occellus-width from lateral eye margin. Posterior ½ of posterior anepisternum and dorso-posterior region of katepisternum sometimes slightly lightened. Second to 4th protarsomeres and 3rd and 4th mesotarsomeres slightly swollen. Second abdominal tergite shorter, baso-lateral ⅔ sometimes slightly lightened and expanding dorsally subapically. Third tergite shorter and sometimes with basal pale fascia widely interrupted in the middle. Fourth tergite rectangular and wide, sometimes with a basal pale fascia widely interrupted in the middle and a central dull black pollinose triangle. Fifth tergite ½ as long as the 4th and sometimes with basal pale fasciate spots. Sixth segment conical, ‘ovipositor’-like, laterally compressed, as long as 5th tergite. Genitalia: Strongly sclerotized. Seventh tergite with anterior margin triangular, basal extensions as long as the 6th segment and sometimes weak (variation), and with pair of short latero-ventral extensions; 7th segment lateral sclerite right triangle shaped. Eighth tergite weakly sclerotized medially, sometimes appearing as a pair of separate sclerites. Cercus with 1 row of marginal pile, overall well sclerotized.

Length. 7.5–11.5mm; wing 6–9mm.

Distribution. Colombia (Amazonas), Ecuador (Napo, Pastaza), Peru (Huanuco, Loreto, Madre de Dios).

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: ‘ECU: Napo, Jatun Sacha // Res., 6km E Misahualli, 450 // m, 1°4'S 77°37'W, 1 May // 2002, M. Buck, // DEBU00177909’ ‘ Holotype // Pelecinobaccha // andrettae // Miranda’ [red label].

Paratypes. COLOMBIA. Amazonas, Letitia, 185m., 19–26 Feb 1972, D. Ward & A. Forsyth (1 ♂, CNC Diptera 160765). ECUADOR. Napo, Jatun Sacha Biol. Res. 6 km E Misahuali, 1°4'S 70°36'W, ~ 450m, 1–2 May 2002, M. Buck (1 ♂, DEBU00177910, 2 ♀, DEBU00177961 & …186892); Pastaza, Pompeya, Napo R., 14–22 May 1965, L. Pena (1 ♂, CNC Diptera 160764). PERU. Huanuco, Cochicote, 9 Sep 1965, J. C. Hitchcock, Jr. (1 ♀, USNM ENT 00257743); [Loreto], Putumayo, Lachorerra, 17–20 Aug 1920 (1 ♀, CNC Diptera 160769); Madre de Dios, Avispas , 400m, 10–30 Sep 1962, L. Pena (1 ♂, CNC Diptera 160763, 9 ♀, CNC Diptera 160766 –8, 160770 & 160771 –5); ..., Manu, Erika (near Salvacion), 550m, 5–6 Sep 1988, A. Freidberg (2 ♀, USNM ENT 00257741–2); ..., Rio Manu, Pakitza, 12°7'S 70°58'W, 250m, 9–23 Sep 1988, A. Freidberg (1 ♂, USNM ENT 0 0 257731, 1 ♀, USNM ENT 00257740) & W. N. Mathis (1 ♂, USNM ENT 00257673).

Comments. Variants have mainly white pile on the pleuron and the 1st abdominal tergite, and have a metabasitarsomere that is pale only on the apical ¼. A few specimens also have central vittae on the 4th and 5th abdominal tergites that are either pale and weak or sub-shining.

Etymology. The specific epithet is a matronym honouring the senior author’s wife. It is to be treated as a noun in the genitive case.

Figures

FIGURE 18. Pelecinobaccha andrettae sp. nov. a – b. Female genitalia: a. Dorsal. b. Lateral. c – f. Male genitalia: c. Epandrium, lateral. d. Epandrium, ventral. e. Hypandrium, lateral. f. Hypandrium, oblique ventral. g. Holotype, habitus, dorsal. h – i. Pelecinobaccha mima (Hull, 1949), holotype, habitus: h. Lateral. i. Dorsal. 7 tg: 7 th tergite, 8 tg: 8 th tergite, 10 tg: 10 th tergite, cerc: cercus, s scl: subepandrial sclerite.