A new study of C. maculatus seed beetles has proven the worst case scenario for most men: size and in this case the number of painful, injuring spikes on their penises do in fact matter. The C. maculatus have a series of spikes and barbs on their members that, during sex, become embedded in their mates, acting as anchors of sorts.

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We are so sorry, but what you are looking at is EXACTLY what you think it is.

“They literally injure females internally in their copulatory duct. They’re pretty mean,” Goran Arnqvist, the lead author of the study, said to National Geographic.

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After looking at a large group of diverse, virgin beetles after copulation the study concluded that the beetles with the “largest and most damaging” phalluses had the most reproductive success. The injury to the females was simply an “unfortunate side effect” of the process. Holding tongue. Not making joke. Holding tongue. Holding tongue….

More entomologically hardcore images below the fold…

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(comment deleted to protect the innocent)

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Is that the Statue of Liberty? Nope, another beetle penis!

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One species of seed beetle actually has a jaw like spine structure on its appendage.


  1. #1 Lance
    February 25, 2009

    I guess “french tickler” would be an understatement.

  2. #2 (Ashamed to post this)
    February 25, 2009

    Five things come immediately to mind:

    1. Looks like Cimex lectularius has some competition…
    2. Why does the first picture remind me of Momaw Nadow?
    3. “Just relax, baby, it’ll only hurt for a little bit.”
    4. On whose fingertips is this travesty occurring?
    5. Everything’s bigger under electron microscopy

  3. #3 Zelly
    February 26, 2009

    And I’m once again very thankful to be human…. and not a seed beetle.

  4. #4 Marcus
    February 26, 2009

    did they need to employ a beetle ‘Fluffer’ to take these shots? and what dose of viagra is OK for a seed beetle?

  5. #5 Katie 2.0
    February 26, 2009

    I have never been more thankful that I’m human, and not a female seed beetle. 🙂

  6. #6 ym
    February 26, 2009

    this one leaves me speechless

  7. #7 bursa evden eve nakliyat
    February 27, 2009

    never been more thank

  8. #8 Ed Yong
    March 1, 2009

    Did they need to employ a beetle ‘Fluffer’ to take these shots?

    Erm, actually, yes they did. A microscopic pipette connected to an pump.

  9. #9 pat
    March 3, 2009


    My favorite of all time photo captions on Zooillogix. Thanks guys! 😀

  10. #10 bug_girl
    March 7, 2009
  11. #11 halı yıkama
    March 19, 2009

    good really

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