Chernetidae

Distinguished from other pseudoscorpion families by chelal (pincer) dentition patterns and trichobothria (sensory hair) arrangement on the pedipalps. Requires microscopic examination of leg segment counts, setal patterns, and genital structures for genus- and species-level identification. Differs from Cheliferidae in having a more compact body form and specific trichobothrial formulas.

Small arachnids with flattened, oval bodies typically 2–5 mm in length. Lacks the elongated tail and stinger of true scorpions. Possesses large, pincer-like pedipalps with movable and fixed fingers used for grasping prey. Body divided into prosoma (cephalothorax) and opisthosoma (abdomen). Eight walking legs present; no spinnerets or silk-producing structures. Coloration generally reddish-brown to dark brown.

Predominantly subcortical, inhabiting spaces beneath the bark of dead and decaying trees. Also found in leaf litter, soil, moss, and rocky crevices. Some species occupy specialized microhabitats including mammal nests and caves. Strongly associated with forested environments where woody debris accumulates.

Cosmopolitan distribution with records from North America, Europe, Asia, and South America. Specific documented localities include Denmark, Norway, Sweden, and Parque Nacional Natural Serranía de Chiribiquete in Colombia. Individual species ranges vary; many are geographically restricted while others are widespread.

Predatory, feeding on small arthropods and other microinvertebrates found in subcortical habitats. Prey includes mites, springtails, small insects, and other soft-bodied invertebrates. Uses pedipalps to capture and manipulate prey.

Development includes egg, protonymph, deutonymph, tritonymph, and adult stages. Nymphs resemble adults but are smaller and lack fully developed genital structures. Molting occurs between each nymphal stage. Females carry eggs in a brood sac attached to the underside of the abdomen. Generation time varies by species and environmental conditions.

Well-documented phoretic behavior: individuals attach to insects (primarily beetles in family Cerambycidae, also Diptera and Hymenoptera) for dispersal to new habitat patches. During phoresy, the pseudoscorpion ceases feeding and development. Attachment sites include legs, elytra, and body surfaces of host insects. Some species exhibit male-male competition for optimal attachment positions on host beetles.

Predators in subcortical microarthropod communities, regulating populations of mites and other small invertebrates. Serve as prey for larger arthropods. Phoretic associations with wood-boring beetles facilitate colonization of ephemeral dead wood habitats, contributing to nutrient cycling in forest ecosystems.

No direct economic importance. Occasionally encountered by entomologists and foresters when examining dead wood. Presence in beetle collections may indicate previously overlooked phoretic associations. Some species may inhabit human structures in forested areas but are harmless and non-venomous to humans.

• CheliferidaeAnother large family of pseudoscorpions; distinguished by trichobothrial arrangement, body proportions, and chelal dentition patterns.
• WithiidaeSimilar subcortical habitat preferences; differs in pedipalp structure and tarsal sensory organ morphology.

• pseudoscorpion
• arachnid
• phoresy
• subcortical
• forest
• beetle association

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• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Hitchin’ A Ride | Beetles In The Bush