Cleridae

Cleridae can be distinguished from other beetle families by several key morphological features. The tarsal formula is 5-5-5, with five tarsomeres on each leg, typically with lobed subsegments and the fourth tarsomere often indistinct. The front coxae expose the second leg segment (trochanter). The pronotum is characteristically narrower than the elytra, while the head is as wide or wider than the pronotum. Unlike the similar family Melyridae, Cleridae lack eversible vesicles on the abdomen and pronotum. The elytra display tiny pits or depressions and never expose more than two tergites. Antennae are variable in form—clubbed, saw-tooth, or thread-like—though most species have clubbed tips.

Cleridae occupy diverse habitats across their worldwide distribution. Three main ecological groups are recognized: flower-visiting species in moist, sunny environments with abundant flowering plants; tree-living species in forests worldwide that seek protection under bark and prey on insects above and below the bark surface; and nest-robbing species that inhabit shrubbery and trees, hunting termite, bee, and wasp larvae without burrowing into bark. Many species are specifically associated with dead or dying wood.

Worldwide distribution across the Americas, Africa, Europe, the Middle East, and Australia. Approximately 3,500 species globally, with about 500 species in North America. The family shows particular diversity in tropical and temperate forest regions.

Most Cleridae are predatory, feeding on other beetles and beetle larvae. Bark beetles (Scolytinae) and wood-boring beetles constitute the most common prey. Adults generally feed on adult beetles, while larvae feed on beetle larvae. Some species have extremely voracious appetites, with larvae capable of consuming several times their body weight daily. Certain genera are scavengers or pollen feeders; Trichodes larvae feed on pollen, while adults prey on grasshoppers and wasps. Necrobia species are attracted to dry carrion and decomposing animal matter.

Females lay 28–42 eggs, typically under bark or between bark pieces on wood-borer-infested trees, or under stones in soil. Eggs are laid 36–72 hours after copulation, which occurs while the female feeds. Larvae are slender, flat, and covered in hair with two horn-like projections on the dorsal area of the last body segment; they are immediately predatory upon hatching. The pupal stage lasts from 6 weeks to one year depending on overwintering requirements and species-specific life cycle length. Most species pupate in earthen cells constructed from soil and oral secretions. Life cycle duration ranges from 35 days to over 3 years, strongly dependent on prey life cycle and temperature. Warmer temperatures accelerate development; extended cold arrests growth.

Many species use pheromones to locate, kill, and consume prey. Thanasimus formicarius exhibits strong preference for vertical tree trunk silhouettes over horizontal ones, with optical habitat cues dominating over olfactory cues alone; bark beetle pheromone and host tree volatiles become attractive only in combination with visual trunk models. Some species show mimicry: Enoclerus species resemble velvet ants (Mutillidae) in coloration and pattern. Trichodes adults visit flowers for feeding and mating, where females lay eggs; larvae attach to bees and wasps visiting flowers, hitchhiking to nests where they prey on brood and consume pollen provisions.

Predators of bark beetles and other wood-boring insects, serving as important natural biological control agents in forest ecosystems. Some species contribute to pollination while visiting flowers. Certain species occupy forensic roles, with Necrobia rufipes attracted to carrion in later decomposition stages.

Significant economic importance in forestry as biological control agents against bark beetle pests such as the southern pine beetle and mountain pine beetle. Research has focused on using pheromone-baited traps to attract clerids to specific trees for pest suppression. Some species are pests of stored products: Necrobia rufipes (red-legged ham beetle) infests dried and smoked meats, causing damage particularly to unwrapped products stored for extended periods. Minor forensic significance: Necrobia rufipes can help estimate post-mortem intervals due to its attraction to late-stage carrion.

• MelyridaeSimilar body form and coloration; distinguished by presence of eversible vesicles on abdomen and pronotum (absent in Cleridae) and different tarsal structure.

• checkered beetles
• predatory beetles
• bark beetle predators
• biological control
• forest pests
• stored product pests
• mimicry
• forensic entomology

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Cleridae | Beetles In The Bush | Page 2
• Orange-banded checkered beetle | Beetles In The Bush
• Ein Beitrag zur Habitatselektion des Ameisenbuntkäfers,Thanasimus formicarius L. (Col., Cleridae) Studies on the habitatselection of the bark-beetlepredatorthanasimus formicarius L. (Col., Cleridae)
• First record of Opilo germanus Chevrolat, 1843 (Coleoptera: Cleridae) from Italy with remarks on its distribution in Europe Prvi podatek o pisancu Opilo germanus Chevrolat, 1843 (Coleoptera: Cleridae) v Italiji s komentarjem njegove razširjenosti po Evropi
• New Central American and Mexican Enoclerus Gahan (Coleoptera: Cleridae: Clerinae): Part II
• Supplement to "Checklist of the checkered beetles of Namibia (Coleoptera, Cleridae)"
• New Contributions for Cleridae (Coleoptera: Cleroidea) Biodiversity of Türkiye
• Checklist of checkered beetles (Coleoptera, Cleridae) from Sakartvelo (Georgia)
• The genome sequence of a Chequered Beetle, Tillus elongatus (Linnaeus, 1758) (Coleoptera: Cleridae).
• A newly-recorded genus, Lasiocallimerus Corporaal, 1939 (Coleoptera, Cleridae) from China, with description of a new species.