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![](https://webarchive.library.unt.edu/eot2008/20081106125253im_/http://nsf.gov/images/x.gif) Discovery Size Trade-off: Horns vs. Copulatory Organs
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![Photo of dung beetle males examined in the study.](https://webarchive.library.unt.edu/eot2008/20081106125253im_/http://nsf.gov/news/mmg/media/images/bug_genitalia1_f.jpg) |
Shown are dung beetle males of two of the ten Onthophagus species examined in the study. From top to bottom: O. gazella (South Africa) and O. sagittarius (Indonesia).
Credit: Armin Moczek |
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![Photo of dung beetle males examined in the study.](https://webarchive.library.unt.edu/eot2008/20081106125253im_/http://nsf.gov/news/mmg/media/images/bug_genitalia2_f.jpg) |
Shown are dung beetle males of two of the ten Onthophagus species examined in the study. From top to bottom: O. watanabei (North Borneo) and O. taurus (Mediterranean).
Credit: Armin Moczek |
Download the high-resolution JPG version of the image. (1.7 MB)
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![Photo of Harald Parzer and Armin Moczek in the laboratory at Indiana University.](https://webarchive.library.unt.edu/eot2008/20081106125253im_/http://nsf.gov/news/mmg/media/images/bug_genitalia3_f.jpg) |
Harald Parzer and Armin Moczek in the laboratory at Indiana University.
Credit: Armin Moczek, Indiana University |
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