Spiders ARE visual hets, whether there is a super form or not. 'Het', short for 'heterozygous', means that the animal carries one mutant gene copy, and one normal gene copy, on the same locus. That is all that it means, and nothing else is implied.
The fact that spiders apparently cannot be homozygous (carry 2 mutant copies of the gene on the same locus) does not in any way change that.
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