 They are readily distinguished from other African theraphosid genera by the combined presence of a retrolateral cheliceral scopula, composed of plumose, stridulatory setae, and the strongly procurved fovea.The fovea is typically strongly procurved and in some species surrounds a distinct protuberance.this protuberance may take the form of a simple posterior extension of the caput, a low-set plug or a prominent, discrete conical projection.