Steganacarid mites from Madeira: The Redescription of Steganacarus (S.) Similis Willmann, 1939 and the finding of S. (Rhacaplacarus) ortizi pérez-iñigo, 1969 (Acarida, Oribatida)

Abstract

The classical species, Steganacarus (Steganacarus) similis Willmann, 1939, is redescribed on the basis of material from the type locality, the island of Madeira. The diagnostic character-states indicate that this species belongs to the magnus group of steganacarid taxa. Another species, S. (Rhacaplacarus) ortizi Pérez-Iñigo, 1969, is reported for the first time on Madeira. The origin of these species on the island is discussed.