Recently Zootaxa, among other journals, has been suppressed from the Journal Citation Report (JCR) for 2019 (2020 release) by Clarivate Analytics based on algorithms, without taking into account the specific nature of taxonomical works, and the importance of systematic/taxonomic journals such as Zootaxa for the entire field of biodiversity research on our planet.
If you use taxonomy in any way, as an ecologist perhaps, during conservation work, making inventories for faunistic studies ... whatever it is, then please support the taxonomic community and sign the petition to Clarivate asking that the decision be reversed: https://www.gopetition.com/petitions/zootaxa-suppressed-from-2019-jcr-data-2020-release.html