1) Arthropod genus 2) Genus oniscus 3) Type genus of the oniscidae 
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 . ...
[n] - type genus of the Oniscidae
genus Oniscus noun type genus of the Oniscidae; woodlice that cannot roll into a ball