Genital Evolution: The Traumas of Sex D.J. Hosken, T.A.R. Price  Current Biology  Volume 19, Issue 13, Pages R519-R521 (July 2009) DOI: 10.1016/j.cub.2009.05.020 Copyright © 2009 Elsevier Ltd Terms and Conditions

Figure 1 An example of the sorts of genital elaboration seen across internal fertilizing animals. Shown here are parts of the male genitalia of several dungfly species. (A) Cordilura pubera; (B) Scathophaga cineraria; (C) Norellia spinimana; (D) Cordilura ciliata. Images courtesy of Aria Minder. Current Biology 2009 19, R519-R521DOI: (10.1016/j.cub.2009.05.020) Copyright © 2009 Elsevier Ltd Terms and Conditions