Type species

Olonthogaster nitidicollis Motschulsky

Adapted from Wood 1982, p. 286-315


Phloeosinus can be distinguished from the other Phloeosinina by the 5-segmented antennal funicle and the third declivital interstriae which are armed with denticles.


Species in this genus range from 1.5 to 4.1 mm in length and are 1.8 to 2.1 times as long as wide. Their color ranges from brown to black, usually with lighter elytra, which can be reddish brown to brown. The pronotum is usually wider than long and unarmed. The scutellum is large. Crenulations are present in the anterior margin of the elytra. The declivity is convex with one or more interstriae, usually number three, armed by pointed tubercles. The vestiture consists of hair-like setae, except for scale-like setae in a few species. The anterior margin of the compound eye is emarginate. The scape is longer than the 5-segmented funicle. The ovate club is asymmetrical, and has three straight sutures. The procoxae are separated.


North America to Panama, Europe, Asia to North Africa, and Australia

World fauna

Number of species: 66, Native species: 24, Introduced species: 1

Established exotic species

Phloeosinus armatus is present in California.


Chamaecyparis, Cupressus, Juniperus, Libocedrus, Picea, Pinus, Pseudotsuga, Sequoia, Taxodium, Thuja, Tsuga