The Purple Pissebed is an ordinary, but sick Pissebed
Purple woodlice, not a separate species, but a sick woodlice
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Photo Purple woodlice by superx96 on Footo.nl
My daughter came back on with a blue-purple pissebed. I read something about that before, but I lost it for a while what was with it.
And I found what was going on again. The blue-purple woodlice have a virus, the Iridovirus. After infection with the virus, after about three weeks, they color purple-blue, which is due to the light reflection on the virus crystals. A week later, they die of the virus.
The virus is not harmful to humans.