Auloceromyia pedunculata Pimentel & Pujol-Luz, 2000

Fachin, Diego Aguilar, 2015, A new species of the rare Neotropical genus Auloceromyia Lindner, 1969 (Diptera: Stratiomyidae) and the first record of the male of A. pedunculata Pimentel & Pujol-Luz, 2000, Zootaxa 4020 (3), pp. 554-570 : 555-563

Auloceromyia pedunculata Pimentel & Pujol-Luz, 2000

( Figs 1–3 , 7–8 , 11–12 , 15–24 )

Auloceromyia pedunculata Pimentel & Pujol-Luz, 2000: 8 –10. Type locality: Brazil, Espírito Santo, Baixo Guandu. Holotype ♀ [MZUSP]; Paratypes: 1 ♀ [MZUSP]. Refs.: Pimentel & Pujol-Luz, 2000: 8 –10; Woodley, 2001: 154 (cat.); Fachin & Lamas, 2015: 407 –408 (cat.).

Diagnosis. Scutum dark brown with yellowish longitudinal dorsolateral bands connecting to yellow spots on postpronotal lobe and with yellow postalar callus on each side ( Figs 7–8 ). Abdomen clearly petiolated on segments 1–2, wasp-like ( Figs 23–24 ); segment 2 mostly whitish, except for lateral margins dark brown to black, with its length at least two times segment 1.

Material examined. 1 ♂ (left wing slide–mounted), BRAZIL, Mato Grosso do Sul, Bodoquena (Fazenda Califórnia), Topo, 20°41’55.9”S 56°52’99.4”W, 08–22.viii.2011, Malaise 0 6, Lamas, Nihei & eq. col. ( MZUSP); 1 ♀ (left wing slide–mounted), Bodoquena, Fazenda Califórnia, 20°41’55.9”S 56°52’99.4”W, Malaise 0 6, 08– 22.viii.2011, Lamas & eq. col. ( MZUSP). 1 ♀, Porto Murtinho, Fazenda Retiro Conceição, Trilha da Mata Bruta, 21°41’52.0”S 57°45’57.1”W, Malaise 33, 01.vii–15.viii.2012, Lamas, Nihei & eq. cols. ( MZUSP).

Male. As females described by Pimentel & Pujol (2000), except as follows. Length: body, 8.0; wing, 6.5. Head. Eyes almost holoptic, with each margin touching ventrally. Occiput dark brown to black. Vertex yellowish posteriorly. Ocellar tubercle dark brown to black, markedly prominent in profile view. Frons strongly reduced, upper half yellowish, lower half dark brown to black. Face rounded, prominent downward with three dark brown maculae; the medial one extending from upper margin of face to lower margin of face; the laterals (wider) from upper margin to lower margin of face. First segment of palpus and proboscis whitish, second segment of palpus dark brown. Legs. Mostly reddish brown, except for mid and hind coxae and trochanters dark brown to black, and hind basitarsus yellowish. Wing ( Fig. 11 ). Basal half of wing strongly wider than distal half. Alula substantially larger than that of female ( Fig. 12 ), with its width increasing abruptly towards apex, entirely covered by microtrichia. Terminalia ( Figs 15–19 ). Genital capsule strongly rounded, posterior margin strongly projected, exceeding the upper margin of genital capsule; inner medial structure of synsternite (ventrally to phallic complex) strongly developed, rounded on basal half, bilobed on distal half with its apical margins almost touching. Gonocoxal apodeme very long, exceeding anterior margin of genital capsule. Gonostylus reduced. Anterior end of the phallic complex slightly distally to anterior margin of genital capsule. Phallic complex with three lobes, medial lobe wider and longer than lateral ones ( Figs. 18–19 ); lateral lobes openings strongly shorter than medial opening; small digitiform projections ventrally at base of the medial lobe; parameral sheath strongly fused to base of lobes, distinguishable only by a sinuous margin more sclerotized dorsally. Epandrium as long as wide ( Fig. 15 ). Proctiger well developed, with distal margin rounded; cercus abruptly enlarging towards distal margin.

Female. Terminalia ( Figs 20–22 ). Tergite 8 nearly rectangular, slender anteriorly. Tergite 9 wider than long. Genital fork wide ( Figs 21–22 ), with anterior arm narrowing towards anterior apex; posterior bridge convex, strongly projected, reaching the half of posterolateral process; posterolateral process wider, strongly convergent on basal two-thirds, parallel on last third, shorter than anterior portion of fork; genital opening very long horizontally, with its lateral margins touching lateral margins of fork medially. Tergite 10 more or less triangular, distal margin strongly rounded. Cercus 1 slightly longer than cercus 2.

Geographic distribution. Brazil (States of Espírito Santo and Mato Grosso do Sul—new record).

Comments. The descriptions of male and female terminalia are the main complements to the original description of Pimentel & Pujol-Luz (2000). There is no male’s information in the literature, and despite Pimentel & Pujol-Luz (2000) provided some illustrations, including drawings of the spermatheca, there is no a formal description of the female terminalia. In this way, the descriptions and illustrations of the first known male of the A. pedunculata and the description of female terminalia were herein presented in order to complete the original description and summarize all the information about this species.

The size and colour intensity of the dark brown to black maculae of female head shows some variation, mainly concerning the maculae on face. The types specimens have the lateral macula split in two small curved spots and a narrowed medial one; while the other specimen as described here, has the lateral one much wider (possibly the two small curved spots fused) extending from the upper margin to the ventral margin of the face and a medial one much wider. There is also some variation in the general body colour: types specimens golden yellow, colour much more intense; other specimens (male and female) whitish yellow to yellow.

Figures

FIGURES 1 – 6. Auloceromyia species, antennae. 1 – 3. A. pedunculata, male (1. Dorsal view; 2. Lateral view. 3. Ventral view). 4 – 6. A. pachypoda nov. sp., female paratype (4. Dorsal view; 5. Lateral view. 6. Ventral view). Abbreviations: flgm, flagellomere; ped, pedicel; scp, scape. Scale bar, 0.5 mm.

FIGURES 7 – 10. Auloceromyia species, thorax in dorsal view. 7 – 8. A. pedunculata (7. Male; 8. Female). 9 – 10. A. pachypoda nov. sp. (9. Male holotype; 10. Female paratype). Scale bar, 1 mm.

FIGURES 11 – 14. Auloceromyia species, wing. 11 – 12. A. pedunculata (11. Male; 12. Female). 13 – 14. A. pachypoda nov. sp. (13. Male holotype; 14. Female paratype). Scale bar, 1 mm.

FIGURES 15 – 17. Auloceromyia pedunculata, male. 15. Epandrium, proctiger and cerci, dorsal view. 16. Genital capsule, dorsal view. 17. Genital capsule, ventral view. Abbreviations: cerc, cercus; epand, epandrium; goncx, gonocoxite; goncx apod, gonocoxal apodeme; prct, proctiger.

FIGURES 18 – 19. Auloceromyia pedunculata, phallic complex (aedeagus + parameral sheath). 18. Dorsal view. 19. Ventral view. Abbreviations: lt lb, lateral lobe; md lb, medial lobe.

FIGURES 20 – 22. Auloceromyia pedunculata, female. 20. Female terminalia, dorsal view. 21. Genital fork, dorsal view. 22. Genital fork, ventral view. Abbreviations: cerc, cercus; go, genital opening; pb, posterior bridge; pp, posterolateral process; st, sternite; tg, tergite.

FIGURES 23 – 24. Auloceromyia pedunculata, habitus, dorsal. 23. Male. 24. Female. Scale bar, 1 mm.