Peter Kovalik
Well-known member

John Boyd (TiF):
John Boyd (TiF):
John Boyd (TiF):
www.jboyd.net/Taxo/changes.html (23 Apr 2014)
www.jboyd.net/Taxo/List2.html#phasianidae
If this circumscription of 'Tetraonini' was a passerine group, it would have been split into three separate families in a heartbeat, and at least someone would be arguing that Bonasa probably represented a fourth family.
Sibley & Monroe's list was an attempt to do exactly this. The result was, indeed, nothing like Phaenicophilidae: these were in family Fringillidae, which included roughly 10% of the bird species of the world.Avise and colleagues actually have suggested genetic distinction as a criteria for ranking groups in a Linnean system (which isn't terribly different from divergence dating in principal), but it pretty much doesn't work between taxonomic groups.
The broad Emberizidae recognised by BOURC and DBA comes close (~8.5%).Sibley & Monroe's list was an attempt to do exactly this. The result was, indeed, nothing like Phaenicophilidae: these were in family Fringillidae, which included roughly 10% of the bird species of the world.
The idea was pretty much abandoned since, I think.