Brachodidae

Definition

A family of small, day-flying moths (Lepidoptera) commonly known as little bear moths, comprising approximately 135 described species with global distribution. Adults often bear a superficial resemblance to certain wasps or clearwing moths (Sesiidae), exhibiting diurnal activity patterns unusual among Lepidoptera. Larval habits are diverse, with some species boring in woody stems, others in herbaceous plants, and a few associated with fungal substrates or detritus. The family's phylogenetic relationships within the superfamily Cossoidea remain poorly resolved, and generic limits are currently unstable.

Etymology

From Greek brachys (short, small) + odon (tooth), referring to small mandibular or other mouthpart structures in the type genus.

Example

Brachodes appendiculata, a widespread Palaearctic species, develops as a stem borer in herbaceous Fabaceae, while adults are active diurnal fliers often mistaken for small vespid wasps.

Synonyms

• little bear moths

Related Terms

• Cossoidea
• Sesiidae
• Lepidoptera
• stem borer
• diurnal moth
• clearwing moth

Usage Notes

The common name 'little bear moths' refers to the family's compact, somewhat hairy body form. Brachodidae are frequently confused with Sesiidae (clearwing moths) due to convergent diurnal behavior and wasp-mimicry, but differ in wing venation, larval biology, and antennal structure. The family's taxonomic composition has shifted historically, with some genera transferred to or from related cossoid families; current generic concepts should be treated as provisional pending molecular phylogenetic revision.