Type species

Bostrichus binodulus Ratzeburg

Adapted from Wood 1982, p. 850-854


Trypophloeus is distinguished from other Cryphalina by the 5-segmented antennal funicle, the ovate and often pointed club which has three straight sutures, and by the absence of erect thick long bristles that occur in some of the other genera in the subtribe.


Species on this genus range from 1.5 to 2.1 mm in length and are approximately 2.3 to 2.5 times as long as wide. Their color ranges from dark brown to black. The pronotum is usually wider than long, with the anterior half asperate, and the anterior margin armed; their lateral margins are not marked by a raised line. The scutellum is small and flush with the elytra. The declivity is convex and unarmed. The vestiture consists of abundant, short ground cover of scales and/ or hair and interstrial rows of short erect bristles. The anterior margin of the compound eye is entire. The scape is usually as long as the 5-segmented funicle. The club is ovate, apically pointed, and has three straight sutures. The procoxae are contiguous.


Northern areas of North America, Europe, and Asia

World fauna

Number of species: 15, Native species: 4, Introduced species: 0


Alnus, Salix, Populus