Acanthopelma beccarii is a species of spider belonging to the family Theraphosidae (tarantulas). It is endemic to Guyana in northern South America.
While there are specimens held in captivity, it is not a very popular species in this regard.
(1947): "Diagnosi preliminari de specie nuove di aracnidi della Guiana Britannica raccolte dai professori Beccari e Romiti". Monitore Zoologico Italiano 56: 20-34.