Churchyard beetle, Cellar beetle vs Darkling beetle

Blaps mucronata compared with Blaps lethifera

Key Differences

• Churchyard beetle, Cellar beetle is Endangered while Darkling beetle is Extinct.

Taxonomic Classification

Rank	Churchyard beetle, Cellar beetle	Darkling beetle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order same	Coleoptera (Beetles)	Coleoptera (Beetles)
Family same	Tenebrionidae	Tenebrionidae
Genus same	Blaps	Blaps
Species	Blaps mucronata	Blaps lethifera

Evolutionary Relationship

Churchyard beetle, Cellar beetle and Darkling beetle share a common ancestor at the Genus level: Blaps.

Conservation Status

Churchyard beetle, Cellar beetle

EN — Endangered

Darkling beetle

EX — Extinct

Physical Characteristics

Attribute	Churchyard beetle, Cellar beetle	Darkling beetle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Churchyard beetle, Cellar beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (9 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Darkling beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (10 countries) and North America (United States).

Churchyard beetle, Cellar beetle

The churchyard beetle or cellar beetle (Blaps mucronata) is a species of large flightless darkling beetle in the family Tenebrionidae, order Coleoptera. Adults are robust, black-bodied beetles reaching twenty to thirty millimeters in length, with fused elytra that render them incapable of flight, a characteristic that restricts dispersal and makes local populations vulnerable to habitat loss. B. mucronata inhabits dark, cool, and humid environments such as cellars, crypts, cave entrances, stables, and the bases of old stone walls — the latter association explaining the common name churchyard beetle, as ancient stone churches with undisturbed subterranean spaces provide ideal habitat. The species is nocturnal and slow-moving, feeding on decaying organic matter, fungi, and plant debris. Its range historically extended across much of western Europe, including Belgium, Denmark, France, Ireland, and the Netherlands, but populations have declined significantly across this range due to habitat loss associated with modernization of buildings, renovation of historic structures, and reduction of traditional agricultural environments with earthen floors and organic refuse. B. mucronata is currently listed as Endangered on the IUCN Red List, reflecting its sensitivity to habitat degradation and limited dispersal capacity. Conservation efforts in several European countries focus on maintaining undisturbed cellars and crypts as microhabitat refuges. The species produces chemical secretions from abdominal glands as a defense against predators.

Shared Countries

Both species can be found in 8 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇸🇪 Sweden 🇨🇭 Switzerland 🇬🇧 United Kingdom