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 91 names. Geographically, these are from all over the world: Albania, Antarctica, Argentina, Bulgaria, Burkina Faso, China, Cuba, France, French Guiana, Georgia, Greece, Iceland, Kenya, Madagascar, Malaysia, Mexico, Morocco, Nepal, Nigeria, North Korea, Papua New Guinea, Poland, Russia, Tanzania, Thailand, Tunisia, Turkey, Uganda, Ukraine, Vietnam.
Deltshev & Indzhov, 2026 — On the identity of the poorly known spider species Centromerus obscurus Boesenberg, 1902 and description of a new species (Araneae: Linyphiidae)