Yes, some sort of Dermestid beetle (the larger group that includes carpet beetles). Used in feeder insect colonies to eat deads and molts. Also found in homes in carpet. Some geckos will eat them, but not too many of them, and not reliably.
Springtails are much, much smaller (about 1mm), isopods don't have that fuzzy larval stage, and neither tolerate dry conditions at all.
Curious about the use of isopods and springtails in controlling snake mites. Both coexist happily with all sorts of detrivorous mites both in vivs and in cultures (though sometimes grain mites can outcompete springtails somewhat). Neither are predatory on mites (they mostly eat fungus and tender plants, though some isopods -- Oniscus sp., I think -- are thought to sometimes possibly maybe outcompete predatory flatworms though an unknown mechanism).
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