South and Southeast Asia, with records extending from the Indian subcontinent into mainland and island Southeast Asia.
Fine-art photographic collection
Anomala dimidiata
A crop-feeding scarab whose gut contains a miniature cellulose-processing laboratory.
About this species
Anomala dimidiata(Hope, 1831)
Information reviewed15 July 2026
Anomala dimidiata is a South Asian scarab whose adults feed on foliage and whose soil-dwelling larvae attack roots. Its digestive tract carries microorganisms capable of breaking down cellulose, helping the beetle exploit tough plant material.
Taxonomy
Animalia · Arthropoda · Insecta · Coleoptera · Scarabaeidae · Anomala
Accepted species or infraspecific taxon in the current GBIF/Catalogue of Life treatment; unsupported details have been omitted rather than inferred. · checked 2026-07-15
South and Southeast AsiaBroad documented range and selected occurrence localities — not a complete occurrence map.
Habitat varies across the documented range; larvae of scarab beetles commonly develop in soil, roots, wood or decaying organic matter.
Adults are seasonal and may be active by day, at dusk or at night depending on the species.
Species-specific diet was not added without a reliable source.
Solitary.
What makes this species remarkable?
Researchers cultured at least eight cellulose-degrading bacterial strains from its gut, revealing a microbial workforce helping to dismantle plant cell walls.
The life cycle attacks plants from both directions: adults skeletonise leaves above ground while white grubs feed on living roots below it.
Adults can gather in large nocturnal feeding swarms, turning scattered beetles into a concentrated wave of damage on orchard and crop foliage.