Lyctini

Small beetles, usually 3-6 mm in length, with elongated cylindrical bodies. Antennae have a two-segmented club. Pronotum lacks the hood-like projection seen in some other Bostrichidae. Elytra are often parallel-sided and may show fine punctation. The declivity (posterior slope of elytra) is gradual rather than abrupt. Distinguished from Dinoderini by the shape of the antennal club and body proportions.

Cosmopolitan distribution, with species occurring across temperate and tropical regions worldwide. Individual species distributions vary; some are widespread through human commerce of timber products.

Larvae feed on starch-rich hardwoods, particularly those with high sapwood content. Require wood moisture content above 8% but below 30%. Cannot digest wood cellulose directly; rely on symbiotic yeasts (Saccharomycopsis) in specialized gut pockets to break down starch.

Complete metamorphosis. Females lay eggs in pores, cracks, or tunnels in wood. Larvae tunnel through wood, creating fine powder-like frass. Development time varies from months to years depending on temperature, wood type, and starch content. Pupation occurs in wood; adults emerge through circular exit holes 0.8-1.5 mm in diameter. Adults do not feed on wood and are relatively short-lived.

Adults are cryptic and often remain in wood until emergence. Larval feeding produces characteristic fine, powdery frass that distinguishes infestations from other wood-borers. Adults may be attracted to light. Some species can reinfest seasoned wood, allowing populations to persist in structural timbers and furniture.

Decomposers of dead hardwoods in natural ecosystems. In forests, they contribute to nutrient cycling by breaking down fallen branches and logs.

Significant pests of seasoned hardwood timber, wooden structures, and wooden artifacts including furniture, flooring, and tool handles. Infestations are detected by emergence holes and accumulations of powder-like frass. Control relies on reducing wood moisture, using resistant wood species, and chemical treatments. International phytosanitary regulations address movement of infested wood products.

• DinoderiniAlso in subfamily Lyctinae; distinguished by different antennal club structure and more pronounced elytral declivity
• BostrichiniDifferent subfamily within Bostrichidae; generally larger, with more robust bodies and often with pronotal hoods; attack softwoods and unseasoned wood rather than seasoned hardwoods

• wood-boring beetles
• powderpost beetles
• stored product pests
• timber pests
• symbiotic yeasts
• cellulose digestion
• hardwood pests
• urban pests

• BugGuide
• iNaturalist taxon
• Catalogue of Life