A provisional inventory of the terrestrial and freshwater invertebrate fauna is available here: Invert database-inventory.
Note that this inventory is work in progress and that taxonomies have not been quality assured by group experts.
The list is based on >700 articles decribing the terrestrial and freshwater invertebrate fauna; a combination of ecological, physiological and taxonomic works. Synonyms have been removed wherever possible. Work to delete misidentifications and clarify taxonomic confusion is ongoing.