Behrens D.W. (2004) Pacific Coast nudibranchs, Supplement II. New species to the Pacific Coast and new information on the oldies. Proceedings of the California Academy of Sciences (4) 55(2): 11–54., available online at http://researcharchive.calacademy.org/research/scipubs/pdfs/v55/proccas_v55_n02.pdf (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.