This is the preformated ITS databases derived from the UNITE database : https://unite.ut.ee/index.php
They include RepS and RefS and singletons clustered at 97%

UNITE is licensed under CC BY-SA 4.0, see LICENCE.txt for details

Unite_s_7.1_20112016_ITS.tar.gz ==> version 7.1 released on 2016-11-20 (download link : https://unite.ut.ee/sh_files/sh_general_release_s_20.11.2016.zip)

Unite_Fungi_8.0_18112018.tar.gz ==> version 8.0 released on 2018-11-18 focused on fungal species. (download link : https://doi.org/10.15156/BIO/786353 )
Unite_Euka_8.0_18112018.tar.gz ==> version 8.0 released on 2018-11-18 for all eukaryote species. (download link : https://doi.org/10.15156/BIO/786354 )

Unite_Fungi_8.2_20200204.tar.gz ==> version 8.2 released on 20200204 focused on fungal species. (download link : https://doi.org/10.15156/BIO/786369 )
Unite_Euka_8.2_20200204.tar.gz ==> version 8.2 released on 20200204 for all eukaryote species. (download link : https://doi.org/10.15156/BIO/786371 )

Unite_Fungi_8.3_20210510.tar.gz ==> version 8.3 released on 20210510 focused on fungal species. (download link : https://doi.org/10.15156/BIO/1280089 )
Unite_Euka_8.3_20210510.tar.gz ==> version 8.3 released on 20210510 for all eukaryote species. (download link : https://doi.org/10.15156/BIO/1280160 )

Unite_Fungi_9.0_20221016.tar.gz ==> version 9.0 released on 20221016 focused on fungal species. (download link : https://dx.doi.org/10.15156/BIO/2483912)
Unite_Euka_9.0_20221016.tar.gz ==> version 9.0 released on 20221016 focused on all eukaryote species. (download link : https://dx.doi.org/10.15156/BIO/2483914)