This is featured at the PNAS site. It appears to not have a permanent link, but it currently is the PNAS Featured Image on their PNAS in the News page. The caption:
The intromittent organ of male seed beetles is armed with sharp spines that puncture the genital tract of females during copulation. This form of sexual conflict has led to coevolution between these harmful male structures and female defense morphologies in this group of insects. Photo courtesy of Johanna Rönn.
It pertains to this article: Coevolution between harmful male genitalia and female resistance in seed beetles, by Johanna Rönn, Mari Katvala, and Göran Arnqvist at the University of Uppsala, Sweden.
