Silvanid Flat Bark Beetles (Silvanidae) - 41 Species, Identification & Facts

Foreign Grain Beetle

Ahasverus advena

Identification: "Note the acuminate last antennomere." (comm. Michael C. Thomas, 2014) Det. M. C. Thomas, 2014 may be a nuisance in new homes, but do no actual harm

Ahasverus new species

Ahasverus new

David Halstead, who is revising Ahasverus , has this as a new species from scattered US localities. (M.C. Thomas, pers. comm.)

Ahasverus rectus

Ahasverus rectus (Ahasverus rectus) is a species in the family Silvanidae, commonly known as silvanid flat bark beetles, belonging to the order Coleoptera (Beetles). It is classified within the subfamily Silvaninae, suborder Polyphaga, superfamily Cu

Square-necked Grain Beetle

Cathartus quadricollis

Pest of corn, both in field and in storage , also found in natural populations in the seed pods of various plants

Merchant Grain Beetle

Oryzaephilus mercator

Identification: see The two Oryazephilus common in the US can be distinguished by a projection or bump just behind the eye. In O. surinamensis , this area is broad and blunt, and in mercator it is narrow and more protruding. Left: O. surinamensis , r

Sawtoothed Grain Beetle

Oryzaephilus surinamensis

Identification: see In O. surinamensis , the angle of head just behind the eye this area is broad and blunt; in O. mercator , short and pointed surinamensis mercator serious pest of stored grain; presence in household products is incidental and cause

Psammoecus bipunctatus

Length 2.3-2.8 mm. This species is easily separated from related species by its colouring. It is yellowish with a darker head and a dark spot beyond the middle of each elytron. The scutellum, head and two penultimate antennomeres are also dark. There

Uleiota planatus

Length 4.5-5.5mm. A conspicuously flat beetle, matt black to brown in colour, with antennae as long as the body. Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box,