Testate Amoebae of the Gondwana-Tropical Group and the Southwestern Border of the Palearctic

Abstract

An analytical overview is presented of the geographical distribution of two testate amoebae of the genera Hoogenraadia and Planhoogenraadia belonging to the Gondwana-tropical group, in the Oriental biogeographic area and Primorskii krai of the Far East. It is shown that some species of these genera occur on the territory of the Sikhote-Alin Nature Reserve and on the islands of Honshu and Hokkaido (Japan), territories belonging to the southeastern part of the Palearctic. Taking into account the geographical distribution of this group of Protozoa, it is proposed to refine the southeastern border of the Palearctic in the Far East area.