The long-standing two-genus treatment of go-away-birds as Corythaixoides personatus, Corythaixoides concolor, and Corythaixoides leucogaster and plantain-eaters as Crinifer piscator and Crinifer zonurus is unsupported by molecular analyses (Njabo and Sorenson 2009, Perktaş et al. 2020). A three-genus treatment, with leucogaster in Criniferoides could be adopted, but given the relatively low genetic and morphological divergence levels, WGAC, Clements et al. (2023), and Gill et al. (2021, IOC v.11.1) now align on treating all the former Corythaixoides species within Crinifer, as Crinifer personatus, Crinifer concolor, and Crinifer leucogaster.
Clements, J. F., P. C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of Birds of the World: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ (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.
