This manuscript reports on the biological materials of arthropods sampled by the members and collaborators of the University of Azores since the 1990’s on subterranean environments of the Azores. We will highlight the occurrence of endemic species in new localities, therefore increasing their known distribution range. These new records will update the conservation priority of the distinct caves, and records of unidentified taxa can call the attention of prospective taxonomists that might be keen on studying these materials.A total of 75 species and subspecies are listed plus 16 taxa identified at family or genus level. The 75 identified taxa include 17 endemic species, from which eleven are cave adapted species.