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Fig. 8 | BMC Evolutionary Biology

Fig. 8

From: Drosophila pachea asymmetric lobes are part of a grasping device and stabilize one-sided mating

Fig. 8

Males with surgically modified epandrial lobes and symmetric mutant males often cannot form a typical wild-type genital locking system. Scanning electron micrographs (190 × magnification) of male and female genitalia, 10 min into copulation, of a mating couple with a symmetric mutant male (a, b, c); a ‘left lobe cut’ male (d, e, f); a ‘right lobe cut’ male (g, h, i), a ‘left lobe shaved’ male (j, k, l) and a ‘right lobe shaved’ male (m, n, o). Views are left lateral (a, d, g, j, m), ventral (b, e, h, k, n) and right lateral (c, f, i, l, o). The male’s epandrial lobes are artificially coloured in red, the male’s lateral epandrial spines in yellow and the female’s oviscapt valves in blue. In (af), the left epandrial lobe is aberrantly placed dorso-laterally In (gi, mo), the right lobe is aberrantly placed dorso-laterally and in (jl), both lobes are positioned as with unmodified wild-type males. Scale bar is 100 μm

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