Drosophila neosaltans Pavan e Magalhães

Roman, Bruna Emilia & Madi-Ravazzi, Lilian, 2021, Male terminalia morphology of sixteen species of the Drosophila saltans group Sturtevant (Diptera, Drosophilidae), Zootaxa 5061 (3), pp. 523-544 : 538

Drosophila neosaltans Pavan e Magalhães in Pavan, 1950

( Fig. 15 )

Non-type material. Strains H 1 (Rio de Janeiro, Brazil): 21 males dissected; and AG (Aguaí, Santa Catarina, Brazil): 15 males dissected .

Male terminalia. Although this species belongs to the elliptica subgroup, it is the one that most differs from the others in its subgroup. The epandrium does not present the epandrial ventral processes in the ventral region; instead, this region displays two small saliences ( Fig. 15C ). The epandrial extensions are very similar to those of D. emarginata and D. neoelliptica ( Fig.15C, D ). Each surstylus has approximately 34 surstylar teeth, irregularly arranged throughout the internal region, plus 7 thinner primary teeth arranged in a row and a tuft of long surstylar bristles ( Fig. 15B–D ). The hypandrium is similar to D. emarginata and D. neoelliptica , elongated and thin, however, the bristles are located at the end of each side of the median gonocoxite ( Fig. 15C ). The aedeagus is the smallest of this subgroup and the apex does not end in a hook shape, but in a cylindrical shape, forming a groove at its end ( Fig. 15A–E ). The dorsal portion of the aedeagus is covered by long scales-like structures ( Fig. 15A, D ). As in D. neoelliptica , this species has a structure called aedeagal ventral crest, but this structure is formed by two isolated protuberances on the central and ventral axis of the aedeagus and it is covered with scales ( Fig. 15A, E ). The lateral postgonites are smaller and taper at the extremity ( Fig. 15A, D, E ). The pregonites are not fused and have a bristle at each end ( Fig. 15E ).

Figures

FIGURE 15. Scanning electron micrographs of D. neosaltans male terminalia. (A) Lateral view of aedeagal apex (1.220 x magnification). (B) Ventral view of aedeagal apex and surstyli (1.230 x magnification). (C) Ventral view of terminalia (432 x magnification). (D) Lateral and dorsal view of terminalia (380 x de magnification). (E) Lateral view of aedeagus and phallapodeme (457 x magnification). The imagens are from AG (A–D) and H1 (E) strains. Abbreviations in Table 1.