Seed beetle genital structures (IMAGE) Uppsala University Caption In the seed beetle (Callosobruchus maculatus), the male has a spiny genital structure that enhances its reproductive success. Credit Johanna Rönn Usage Restrictions Only to be used when reporting about research by Johanna Rönn. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.