1. 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: /j.cub
Copyright © 2009 Elsevier Ltd Terms and Conditions

2. 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  , R519-R521DOI: ( /j.cub )
Copyright © 2009 Elsevier Ltd Terms and Conditions