The new species Brachypelmides klaasi differs from all the species of the Brachypelma genus by its sharply pointed embolus, its bipartite spermathecae and its fine bearing of plumose setae on femur IV. It is the first representative of a new genus.
Stud. neotrop. Fauna Environ. 29: 7-10. 7, f. 1-2