Õunap et al. 2019 placed Perizoma basaliata in genus Martania based on phylogenetic study. Moth Photographers Group, which BugGuide follows, adopted this change.
Õunap, E., Tammaru, T., & Truuverk, A., 2019. Perizomini (Lepidoptera: Geometridae: Larentiinae) are polyphyletic. Insect Systematics & Evolution, 51(3) 489-516. DOI: https://doi.org/10.1163/1876312X-00002301
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.