Zaprionus Zaprionus gabonicus Yassin & David, 2008

Yassin, Amir & David, Jean R., 2010, Revision of the afrotropical species of Zaprionus (Diptera, Drosophilidae), with descriptions of two new species and notes on internal reproductive structures and immature stages, ZooKeys 51, pp. 33-72 : 49-51

Zaprionus Zaprionus gabonicus Yassin & David

Diagnosis.

This species resembles Zaprionus indianus , but it can be distinguished from it by the small body size and the total lack of serration on the aedeagal flap ( Fig. 12 )

Description.

♂. TL = 1.40 mm.

Head. Arista with 3 dorsal and 2 ventral rays plus terminal fork; pedicel white, flagellomere I dark brown. Frons orange, sometimes with highly vestigial median stripe plus orbital stripes inwardly bordered with black; ocellar triangle concolorous with frons; hw:fw = 2.45, fw:fl = 0.85. Orbital setae in straight line; or1:or2:or3 = 1.1:1.0:1.2, orbito-index = 1.1, oc:or1 = 1.4, poc:oc = 0.7, iv:ov = 0.7. Face whitish yellow; carina broad and bulbous. Gena narrow; o:j = 10, o:ch = 4.9. Eye red.

Thorax. Scutum brown, darker than frons, with 2 silvery white stripes. acs in 6 rows in front of adc; adc:pdc = 0.75. Scutellum darker than scutum, with black borders of the stripes expanded posteriorly; bsc:asc = 0.9. Pleura yellow; sterno-index = 0.44. Forefemur with 4-5 spines borne on warts on the anteroventral margin. Male basitarsus with a hairy brush.

Wing. Yellowish. C-index = 2.3, 4v-index = 1.4, 4c-index = 0.8, 5x-index = 1.0, M-index = 0.4, ac-index = 2.2, b/c = 0.6, C3 fringe = 52%, and WL = 2.7 mm.

Abdomen. Entirely yellow with deep dark spots at the bases of tergal setae.

Terminalia. Epandrium densely pubescent throughout its entire length; posterior margin pubescent at dorsal portion with 4 long setae; epandrial ventral lobe with 3 long setae. Surstylus quadrate with two rows of prensisetae. Cercus triangular laterally. Hypandrium densely pubescent at the lateral portion of the paraphyses. Aedeagus slender expanded apically without a hook-like appendix; aedeagal flap expanded and not serrated. Apodeme subequal in length to aedeagus.

♀. TL = 1.34 mm, resembling male.

Terminalia. Oviscape not constricted ventrally, with 6 (rarely 7) peg-like and 6 short, marginal setae plus 4 supernumeraries. Spermatheca globulous and smooth, not wider than longer.

Egg. Elliptical with 4 equally long and fine filaments.

Larva. Escaping the culture medium when crowded.

Puparium. Horn-index 10.4.

Figures

Figure 12. Distiphallus, oviscape and spermatheca of Zaprionus africanus Yassin & David in Yassin et al. 2008 b a-c, Zaprionus gabonicus Yassin & David in Yassin et al. 2008 b d-f, and Zaprionus indianus Gupta, 1970 g-i.