In the Ephebopus genus, E. cyanognathus is the most popular. The brilliantly colored spiderling gives rise to a somewhat less brilliant adult, though the blue chelicerae for which the species is named persist. E. cyanognathus is found in the Tresor and Roura Mountains of French Guiana. Other members of the Ephebopus genus have been found in Guyana, French Guiana, Suriname, and northeastern Brazil.
In captivity E. cyanognathus quickly reveals its fossorial nature, digging a tunnel straight down to the bottom of the enclosure. There it will stay, occasionally coming to the tunnel outlet with a display of its blue chelicerae. Here it can be coaxed out with tong feeding. As much as hobbyists lament pet holes, E. cyanognathus remains steady in demand. Hardy and fast growing, female E. cyangnathus can reach 5″ in less than two years. At this size they are sexually mature. E. cyangnathus is rather skittish, with small disturbances causing immediate retreat.
The photo above shows one of the spiderlings for sale.