A member of the family Cucujidae, a group of small beetles, often called flat-grain beetles or rusty beetles.
From Modern Latin 'Cucujidae' (the family name), derived from 'Cucujus' (the genus name), possibly from an indigenous word for a type of beetle.
Cucujid beetles are so flat they can slip into incredibly tiny cracks in grain and wood—their extreme flatness is such a competitive advantage that evolution has made them the thickness of a credit card.
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