The rare and poorly known Black-fronted Francolin Pternistis atrifrons is lumped with Chestnut-naped Francolin Pternistis castaneicollis, due to low levels of phenotypic, genetic, and vocal divergence (Töpfer et al. 2014). We now recognize each of the two former species as monotypic groups: Chestnut-naped Spurfowl (Northern) Pternistis castaneicollis castaneicollis, and Chestnut-naped Spurfowl (Black-fronted) Pternistis castaneicollis atrifrons. Note the change in the English group name, from 'francolin' to 'spurfowl': francolins of the genus Pternistis now are known to be not closely related to 'true' francolins of the genera Peliperdix, Ortygornis, Francolinus, Campocolinus, and Scleroptila (Crowe et al. 2006, Kimball et al. 2021), and therefore we follow Mandiwana-Neudani et al. (2019) in changing the group name for all species of Pternistis from francolin to spurfowl.
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.
