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Message: <blockquote data-quote="Nicolas C" data-source="post: 114940" data-attributes="member: 3795">This is a quote I found on this excellent website: <a href="http://www.theraphosidae.be/en/ceratogyrus-marshalli/" target="_blank">http://www.theraphosidae.be/en/ceratogyrus-marshalli/</a>Dennis Van Vlierberghe  wrote this:"Until today it is still unknown why these horns could have a positive impact on the lives of the tarantulas. Anatomically, the horn is located on top of the fovea. Underneath the fovea, inside the tarantula, the dorsal dilator muscle is attached to the apodeme. Different to all other bird spider the apodeme of the horned Ceratogyrus-species is ringshaped. The increased surface for the attachment of the dilator muscles, inside the horn, could aid in drawing in liquified food into the sucking stomach. On the other hand the increased surface could serve as storage area to survive periods of extreme drought and lack of food (Rick C. West/1986)."</blockquote>