The editorReinhard Gerecke is free lance zoologist and lecturer atthe institute of Evolution and Ecology at the university of Tübingen.

Order Araneae Family Argyronetidae THORELL, 1870 Order Acari I - General Introduction - Limnic Acaridida (Astigmata) Family Acaridae Family Histiostomatidae (formerly: Anoetidae) - Limnic Oribatida Family Mucronothridae Family Trhypochthoniellidae Family Malaconothridae Family Hydrozetidae Family Limnozetidae Family Mycobatidae Family Zetomimidae - Halacaridae Subfamily Copidognathinae Subfamily Halacarinae Subfamily Limnohalacarinae Subfamily Lohmannellinae Subfamily Porolohmannellinae Subfamily Rhombognathinae Subfamily Ropohalacarinae - Terrestrial Parasitengona inhabiting transient biotopes Superfamily Calyptostomatoidea Superfamily Erythraeoidea Superfamily Trombidioidea Family Johnstonianida Family Microtrombidiidae Family Tanaupodidae Family Trombidiidae - Hydrachnidia I Superfamily Stygothrombioidea Family Stygothrombiidae Superfamily Hydrovolzioidea Family Hydrovolziidae Superfamily Eylaoidea Family Limnocharidae Family Piersigiidae Family Eylaidae Superfamily Hydrachnoidea Family Hydrachnidae