Trichomanes elongatum was excluded by APC, but has come into the taxonomy as an accepted name from NZOR. Its synonyms Abrodictyum elongatum and T. rigid var. elongatum are listed in both APC and NZOR, but have been synonymised to the family level rather than to the accepted name.
It seems that if we're including T. elongatum as an accepted name from NZOR when should use the NZOR synonymy.
From help desk issue - https://support.ehelp.edu.au/a/tickets/203560
Trichomanes elongatum was excluded by APC, but has come into the taxonomy as an accepted name from NZOR. Its synonyms Abrodictyum elongatum and T. rigid var. elongatum are listed in both APC and NZOR, but have been synonymised to the family level rather than to the accepted name.
It seems that if we're including T. elongatum as an accepted name from NZOR when should use the NZOR synonymy.