Oryzaephilus mercator

Oryzaephilus mercator
Merchant grain beetle
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Silvanidae
Genus: Oryzaephilus
Species: O. mercator
Binomial name
Oryzaephilus mercator
(Fauvel, 1889)

The merchant grain beetle, Oryzaephilus mercator, is a slender, dark brown beetle.

It can be found infesting biscuits and fruit and nut products. The adults can fly but rarely do. They can be differentiated from Oryzaephilus surinamensis by looking at the distance of the eye to the prothorax: with the merchant grain beetle it is less than half the vertical diameter of the eye.

Like O. surinamensis, they are distributed throughout the world and regularly transported to consumers in unprocessed cereals, oil cakes, and from grains from other stores.