Cycas taitungensis C.F.Shen, K.D.Hill, C.H.Tsou & C.J.Chen had been synonymized under Cycas revoluta Thunb. based on both morphological and genetic evidence.
Chang, J. T., Chao, C. T., Nakamura, K., Liu, H. L., Luo, M. X., & Liao, P. C. (2022). Divergence With Gene Flow and Contrasting Population Size Blur the Species Boundary in Cycas Sect. Asiorientales, as Inferred From Morphology and RAD-Seq Data. Frontiers in Plant Science, 957.
Chang, J. T., Chao, C. T., Nakamura, K., Liu, H. L., Luo, M. X., & Liao, P. C. (2022). Divergence With Gene Flow and Contrasting Population Size Blur the Species Boundary in Cycas Sect. Asiorientales, as Inferred From Morphology and RAD-Seq Data. Frontiers in Plant Science, 957. (Link)
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.