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Since childhood, I've always thought of the °oo° pattern of four frontmost eyes as iconic for spiders (note: the pattern does not account for any additional eyes or lack thereof further to the sides or back; also, title font seems to make the °'s relatively smaller than the main text's font does - this was not intentional). And yet taking a look at a couple of eye-based family identification tables, it seems that the above pattern is the go-to sign of a jumping spider.

Is this pattern unique to salticidae, or are there other groups of spiders with the four foremost eyes matching such a pattern (either four equal-sized eyes, or the secondary ones slightly smaller)? If the latter, what groups sport a similar look?

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It is pretty much unique to salticidae, although I did find some similar eye arrangements in sicariids and scytodids.

Salticidae:

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Sicariidae:

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Scytodidae:

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Image source

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