Climacoceras (from Greek, "Ladder Horns") was a genus of early Miocene artiodactyl ungulates of Africa and Europe. The members of Climacoceras were related to giraffes, as the genus was once placed within Giraffidae. Fossils of the two best known species of Climacoceras, C. africanus and C. gentryi have been both found in Kenya. The animals measured about 1.5 m in height and had large ossicones resembling antlers. C. africanus had ossicones resembling tall thorn-covered plant stems, while the ossicones of C. gentryi resembled thorny crescents.