
Belgian Shepherds - 4 Varieties (3 Coat types), but 1 breed.
Chows come in Rough and Smooth, as same breed.
Then you have some that have been seperated:
Norfolk and Norwich terriers,
Rough and Smooth Collies.
Irish and Irish Red and White Setters (The IRW was the original, and the self coloured breed is now a much finer build).
All the Dachshund Coat typesand sizes (2 sizes UK, and 3 in FCI Countries).
Sure there are loads more.
Then you have the confusion with Elkhounds, as they are a group of breeds, like Setters or Springers, Retrievers.
So we have the only one in UK the Norwegian Elkhound.
There is the Jamthund (Swedish Elkhound) originally registered with the Norwegian as one breed, but seperated in 1946. They are much larger rangier and have characteristic white markings.
From them came the White Swedish Elkhound.
The Black Elkhound is smaller and virtually indistinguishable from a black Norwegian Buhund.
Lots of breeds started as types within a breed and then became so distinct that they became seperate breeds.
Covkers come to mind, officially 2 breeds American and English, but you then you have the very distinctly different Working type????