Can anyone ID this invert?

[Erie_herps]

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).

On the MorphMarket forum someone tried an experiment with springtails and snake mites (in bioactive enclosures) with promising results. I can add the link here on Monday if anyone's interested. Springtails will eat eggs of many species (mites, fungus gnats, fruit flies, etc.). For controlling snake mites with other species, predatory mites work the best.