Ant Woodlouse Platyarthrus hoffmannseggii

This is perhaps the strangest woodlouse on record: it lives exclusively in ant colonies, munching on ant droppings and fungal mildew. At just 4mm long and ghostly white, it's specially adapted to underground life with a distinctive oval body and tiny antennae. Its entire geographic range follows its ant hosts — Lasius and Myrmica species — making it a perfect example of extreme coevolution. Found from the Mediterranean to the British Isles and beyond, its fate is forever tied to its ant companions.