Morimus asper
Local name: Lamie bûcheron
Lamie bûcheron (Morimus asper) is a large, robust longhorn beetle characterized by its distinctive black coloration and prominent antennae that can exceed body length in males. This saproxylic species plays a crucial ecological role as a decomposer, with its larvae developing in decaying hardwood trees, particularly oak, beech, and other deciduous species, helping to recycle nutrients in forest ecosystems.
30
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Morimus_asper
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Coleoptera
Family
Cerambycidae
Genus
Morimus
Morimus asper belongs to the family Cerambycidae, order Coleoptera, within the Insecta class.
Species Profile
Lamie bûcheron (Morimus asper) is a large, robust longhorn beetle characterized by its distinctive black coloration and prominent antennae that can exceed body length in males. This saproxylic species plays a crucial ecological role as a decomposer, with its larvae developing in decaying hardwood trees, particularly oak, beech, and other deciduous species, helping to recycle nutrients in forest ecosystems.
Morimus asper, the Great Capricorn Beetle, faces severe population declines primarily due to habitat loss and fragmentation of old-growth deciduous forests. The species depends on mature oak and beech trees for breeding, but deforestation, urbanization, and intensive forest management have drastically reduced suitable habitat across its European range.
Key Facts
Habitat & Distribution
This beetle inhabits mature deciduous and mixed forests with abundant dead wood, particularly favoring sun-exposed dead trunks and large branches of oak, beech, and other hardwood species. The species requires forests with a continuous supply of decaying wood in various stages of decomposition, typically found in old-growth stands or forest edges with natural tree mortality.
Threats
IUCN Red List: Critically Endangered
Morimus asper, the Great Capricorn Beetle, faces severe population declines primarily due to habitat loss and fragmentation of old-growth deciduous forests. The species depends on mature oak and beech trees for breeding, but deforestation, urbanization, and intensive forest management have drastically reduced suitable habitat across its European range.
Forest fragmentation
Habitat loss and deforestation
Intensive forest management practices
Loss of old-growth trees
Urbanization and development
Found in 30 Countries
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Morimus asper (Morimus asper). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/lamie-bucheron