Another Old World fossorial species carrying a horn, the Ceratogyrus marshalli (Straight-Horned Baboon) has a straight vertical horn coming up from its carapace. These spiders are aggressive but mesmerizing when displaying their horn.
photo by theraphosidae.be
Species: marshalli
Genus: Ceratogryus
Subfamily: Harpactirinae
Identified: Pocock, 1897
Common Name: Straight Horned Baboon
Origin: Zimbabwe, Mozambique (Old World)
Lifestyle: Terrestrial, Obligate Burrower
Max Size: 5"