Our “Index descriptus” represents a list of newly described organisms, most often new species, whose descriptions appear for the first time on the pages of Historia naturalis bulgarica. Currently contains 73 names. Geographically, these are from all over the world: Albania, Antarctica, Bulgaria, Burkina Faso, China, Cuba, France, Greece, Iceland, Kenya, Madagascar, Mexico, Nepal, Nigeria, North Korea, Papua New Guinea, Tanzania, Tunisia, Turkey, Uganda.