There are over 190 varieties (including species & subspecies) of cicadas in North America, and over 3,390 varieties of cicadas around the world. This number grows each year as researchers discover and document new species. Cicadas exist on every continent but Antarctica.
The 3,390 comes from counting the species of cicadas mentioned in Allen Sanborn’s Catalogue of the Cicadoidea.
Cicadas were discovered and described in 2014, take a look at research since then published: 2021, 2020, 2019, 2018, etc.