Dark Mealworm
Tenebrio obscurus
Classification
- Phylum: Arthropoda
- Subphylum: Hexapoda
- Class: Insecta
- Order: Coleoptera
- Suborder: Polyphaga
- Superfamily: Tenebrionoidea
- Family: Tenebrionidae
- Subfamily: Tenebrioninae
- Tribe: Tenebrionini
- Genus: Tenebrio
- Species: obscurus
Pronunciation
How to pronounce Tenebrio obscurus: /tɛˈnɛbri.o ɒbˈskʊrəs/
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Images
Summary
Tenebrio obscurus, also known as the dark mealworm, is a species of darkling beetle whose larvae are utilized as mini mealworms. This species is notable for its dark coloration and ecological role in biodegradation.
Physical Characteristics
Larvae are cylindrical and initially white, darkening as they mature, reaching 25 to 30 mm in length. Adults are small black beetles, measuring 12 to 18 mm long, with a dull appearance that can be lighter brown compared to T. molitor.
Identification Tips
Distinguished from T. molitor by a dull dorsum and enlarged front legs in males.
Habitat
Commonly found in litter of chicken coops, birdhouses, and stables; generally associated with materials of animal and vegetable origin.
Distribution
Scattered records in the US and most temperate regions worldwide; introduced to North America around 1860.
Diet
Feeds on refuse grain, coarse cereal, mill products, meat scraps, dead insects, and feathers. Act as a storage pest.
Life Cycle
Larvae undergo a pupation stage before emerging as adults.
Ecosystem Role
Serves as a feeder insect for birds, reptiles, amphibians, and zoo animals; contributes to waste biodegradation.
Economic Impact
Considered a storage pest; larvae are used in animal feeding.
Cultural Significance
Used as feeder insects in captivity for pets and zoo animals.
Similar Taxa
Misconceptions
Often confused with younger mealworms (T. molitor) or the confused flour beetle (Tribolium confusum).
Tags
- dark mealworm
- Tenebrio obscurus
- insects
- entomology