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Male phallic apparatus in Drosophila yakuba mayottensis showing the placement of the 2 structures distinguishing D. y. yakuba and D. santomea: posterior parameres (dotted outline, above) and phallic spurs (dashed outline, below). Arrowheads indicate the distinguishing protrusions being longer in both subspecies of D. yakuba. ae = aedeagus; hyp = hypandrium; phap = phallic apodeme.
