Auloceromyia Lindner, 1969

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

Auloceromyia Lindner, 1969

( Figs 1–38 )

Auloceromyia Lindner, 1969: 8 –10. Type species: Auloceromyia vespiformis Lindner, 1969 (mon.).

Diagnosis (Modified from Lindner 1969; Pimentel & Pujol-Luz 2000). Males and females with marked sexual dimorphism in head morphology, i.e., males almost holoptic and females dichoptic. Body dark brown to black with whitish to reddish yellow pattern. Eyes pilose (see comments below). Antenna highly modified, with flagellomeres 4–6 each wider than long and flagellomeres 7–8 strongly concave laterally ( Figs 1–6 ). Colour pattern of scutum much variable ( Figs 7–10 ), but usually with three wide horizontal dark brown to black bands separated by yellow bands ( Figs 7–8 ). Abdomen frequently petiolated on segments 1–2, wasp-like ( Figs 23–24 ) or as long as wide, not clearly petiolated ( Figs 34 , 38 ).

Geographic distribution. Brazil (States of Espírito Santo, Mato Grosso do Sul—new record—, Minas Gerais, Santa Catarina and São Paulo) and Argentina (Provincie of Pronunciamiento)—new record.

Comments. All described species of the genus, including Auloceromyia pachypoda nov. sp. described here, seems to have some degree of pilosity on the eyes, being more evident and dense in A. vespiformis (see Lindner 1969, Figs 1–2 ) and in females of A. pachypoda nov. sp., and inconspicuous and very short in A. pedunculata and in males of A. pachypoda nov. sp. Beyond the highly modified antenna mainly on the 7th and 8th flagellomeres ( Figs 1–6 ), the presence of pilosity in the eyes was described by Lindner as diagnostic for the genus, but this feature is not so clear to notice when compared with the modified antenna.

The reduced gonostylus ( Figs 17 , 27) also seems to be an unique condition for the genus, but its assumption should be still investigated, comparing with related groups.

Figures

FIGURE 38. Auloceromyia pachypoda nov. sp., female paratype, habitus, dorsal view. Scale bar, 1 mm.

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.

FIGURES 28 – 29. Auloceromyia pachypoda nov. sp., phallic complex (aedeagus + parameral sheath), holotype. 28. Dorsal view. 29. Ventral view. Abbreviations: lt lb, lateral lobe; md lb, medial lobe.

FIGURES 30 – 33. Auloceromyia pachypoda nov. sp., female paratype. 30. Female terminalia, dorsal view. 31. Genital fork, dorsal view. 32. Genital fork, ventral view. 33. Spermathecae. Abbreviations: cerc, cercus; go, genital opening; pp, posterolateral process; st, sternite; tg, tergite. Scale bar, 0.1 mm.

FIGURES 34 – 37. Auloceromyia pachypoda nov. sp., male holotype. 34. Habitus, dorsal view. 35. Habitus, lateral view. 36. Head, dorsal view. 37. Antenna.