As far as I have understood it, an incomplete dominant allele is an allele where there is a partial expression of one allele in the heterozygote that is achieved fully in the homozygote, whereas a co-dominant allele is where the heterozygote expresses both phenotypes simultaneously (as the classic example being of red and white alleles showing a pink flower) - I had not heard of the regional partitioning as differentiating between the two, but I will try to see if there are any papers through Web of Science to back that up [if I find some, I will post the source information here]. However, like I said, I do plan on using the term incomplete dominant in any publication I write as it does more accurately fit the description of these mutants.
Also, @Ax01, you say that Asphalt is actually identifiable in the heterozygote form - what phenotypic features distinguish a heterozygote Asphalt mutant from a wildtype? Also, could you elaborate on the phenotype of the Blade mutant? I have been able to find very little information, and only have one picture of a single individual, so I cannot reliably classify it or distinguish it from certain other mutants.
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