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Oniscus asellus - male top 1 (aka).jpg
Oniscus asellus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Isopoda
Family: Oniscidae
Genus: Oniscus
Linnaeus, 1758 [1]

Oniscus is a genus of woodlice. It comprises five species, three of which are confined to northwestern Iberia (Oniscus ancarensis, O. galicianus and O. lusitanicus), one to the Pyrenees (Oniscus simonii), and one of which, O. asellus, is widespread across Europe and has been introduced to the Americas .[2]