Linked from
The 11 pages that link to Allophone, each with the reason it gives.
PhonemeRelated: Allophones are distinct pronunciations grouped under one phoneme.
Minimal pairCompared with: Allophones can differ phonetically without forming a minimal pair.
LenitionRelated: Some lenited forms are predictable allophones of stronger consonants.
ErhuaRelated: Some erhua pronunciations vary without creating a new lexical contrast.