Ceratogyrus marshalli (Straight Horned Baboon)

What sets this species apart from most, and makes it unique to many collections, is the black horn that grows in the center of its carapace. This species grows the largest horn of the Ceratogyrus genus and the horn is straight rather than curved as is seen on the C. darling. Foveal horns are seen in many species within the Ceratogyrus genus. This formidable species is known to be aggressive, a trait common to African species. Great care should be taken with this fast spider. They are very efficient earth movers and you will see them burrow and web up their home pretty quickly.
But what is that horn for? Well, no one seems to know for certain, but as is referenced below, Rick West suggested that the horn may give this spider a greater ability to eat quicker by increasing its ability to draw up liquefied food. It may also allow it to take in more nutrients and water.
West, R.C. (1986). Ceratogyrus. Journal of the British Tarantula Society 1(4):79-80

Name Pronunciation:
Ceratogyrus (suh-rah-tuh-JY-ruhs)
* Adapted from The American Tarantula Society

Name and Description History:
Ceratogyrus marshalli Pocock, 1897

Obligate burrower
Size: About 4-5”
Growth Rate: Fast
Natural Habitat: South east Africa – Zimbabwe and Mozambique. Scrubland
Housing Needs: Terrestrial burrowing setup.
Temperament: These guys are known to be rather defensive.