The apophysis has a marked transverse keel and a blunt umbo. Apophysis is an open source fractal flame editor and renderer for Microsoft Windows and Macintosh. The palp usually has a simple retrolateral tibial apophysis with a blunt tip. Male "Augacephalus breyeri" have a megaspine surmounting a distal proventral tibial apophysis. The male has a blunt tibial apophysis and long slender legs. They vary in shape and lack an apophysis and an umbo. Additionally males will gain an embolus on the pedipalps and tibial apophysis (mating hooks). The inner side of the operculum is with a prominent apophysis arising from the nucleus. The pedipalp in the male has a single tibial apophysis which tapers gradually. Male pedipalps have a hook-like terminal apophysis. The tibial apophysis (outgrowth) on the first leg is absent or small. The tibial apophysis is pointed and has 2 barbs. The tibial apophysis has a fine, long, pointed, hook-shaped process. "Theraphosa apophysis" generally resembles "Theraphosa blondi", and reaches a similar size. The male's maxillae each have an outgrowth (apophysis) that is absent in females.