Woodlouse
The first woodlice were marine isopods which are presumed to have colonised land in the Carboniferous. They have many common names and although often referred to as 'terrestrial Isopods' some species live semiterrestrially or have recolonised aquatic environments. Woodlice in the families Armadillidae, Armadillidiidae, Eubelidae, Tylidae and some other genera can roll up into a roughly spherical shape as a defensive mechanism; others have partial rolling ability but most cannot conglobate at all.
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