Nigranitida Metz

Webb, Donald W. & Metz, Mark A., 2004, The South American genus Nigranitida Metz (Diptera: Therevidae: Therevinae) with the description of three new species, Zootaxa 757, pp. 1-16 : 3-4

Nigranitida Metz

Nigranitida Metz (Metz et al. 2003:239 orig. desc.,). Type species Psilocephala costata Wulp (1888:368) by original designation.

Metz (Metz et al. 2003:239) provided an extensive diagnosis for Nigranitida . The following additions to the diagnosis are based on the species circumscription defined in this revision: body length males 5.3–6.7 mm (n=9), females 5.7–8.8 mm (n=14); male ommatidia smaller ventrally and laterally; male frons lacking setae; ventral lobe with ventral spines; distiphallus lacking apicolateral spines; ejaculatory apodeme bulbous posteriorly, in crosssection flattened dorsoventrally; furca ( Fig. 10 ) oval, posterior margin rounded, anterior margin truncate; anterolateral projections short, posteromedial and anteromedial projections absent; spermathecal ducts directed anteriorly.

Distribution. Nigranitida is known only from Argentina.

Figures

FIGURES 1 – 10. Nigranitida costata 1. Tergite 8, epandrium, cerci, hypoproct, dorsal view (MEI 048204). 2. Sternite 8, hypandrium, gonocoxite, ventral view. 3. Gonocoxite, hypandrium, dorsal view. 4. Gonocoxite, left lateral view. 5. Gonostylus, left lateral view. 6. Aedeagus, dorsal view (inset: ejaculatory apodeme cross­section). 7. Aedeagus, ventral view. 8. Aedeagus, left lateral view. 9. Female head. 10. Female internal reproductive organs (MEI 106765). Scale = 0.1 mm. Abbreviations: C = cercus, CD = common duct, DA = dorsal apodeme, Dp = distiphallus, EA = ejaculatory apodeme, Ep a = epandrium, F = furca, GA = gonocoxal apodeme, Gs = gonostylus, Gx = gonocoxite, GxB = gonocoxal bridge, H = hypandrium, Hp = hypoproct, Sp = spermatheca, SpD = spermathecal duct, SpS = spermathecal sac, SS = sensory seta, S 8 = sternite 8, T 8 = tergite 8, VA = ventral apodeme, VL = ventral lobe. Figure 9 modified from Metz et al, 2003.