Drosophila emarginata Sturtevant, 1942

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 : 537

Drosophila emarginata Sturtevant, 1942

( Fig. 13 )

Non-type material. Strain JD ( Vera Cruz , Mexico): 10 males dissected .

Male terminalia. The epandrial ventral processes are divergent ( Fig. 13D ). The epandrial extensions are located below the surstyli and they present flattened shape at their end ( Fig. 13D ). Each surstylus has 30 to 35 surstylar teeth, irregularly arranged throughout the internal region, plus 6 thinner primary teeth arranged in a row and a tuft of long surstylar bristles ( Fig. 13D ). The hypandrium is elongated and thin; the median gonocoxites converge at the end and have hypandrial bristles ( Fig. 13A ). The aedeagus appears sickle-like ( Fig. 13C ). The central axis of the aedeagus has a cleft on the dorsal region covered with scales ( Fig.13B ). The aedeagal apex has a hook shape, with a bipartite and pointed termination ( Fig. 13B, C ). The aedeagus presents a pair of large and long lateral postgonites ( Fig. 13B, C ), which are in continuity with the phallapodeme and extend along the entire length of the central axis. The pregonites are fused at the end and have no bristles ( Figs. 13C ).

Figures

FIGURE 13. Scanning electron micrographs of D. emarginata male terminalia. (A) Ventral view of hypandrium (554 x magnification). (B). Dorsal view of aedeagus. Arrow heads = a cleft on the dorsal region covered with scales (727 x magnification). (C) Lateral view of aedeagus (398 x magnification). (D) Ventral and dorsal view of terminalia, without aedeagus. (491 x magnification). The imagens are from JD strain. Abbreviations in Table 1.