Hethemia was synonymized with Thalera in
Ban X., N. Jiang, R. Cheng, D. Xue, H. Han, 2018. Tribal classification and phylogeny of Geometrinae (Lepidoptera: Geometridae) inferred from seven gene regions. Zoological Journal of the Linnean Society, 184(3): 653-672.
https://doi.org/10.1093/zoolinnean/zly013
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.