Cramptonomyia spenceri
This record describes Cramptonomyia spenceri (species). Recorded family: Pachyneuridae. Recorded order: Diptera.
Identification and Appearance

Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Diptera (Flies)
- Family
- Pachyneuridae
- Genus
- Cramptonomyia
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
Larvae live in rotten Red Alder.
Geographic Range
Coastal forests of Oregon, Washington, and British Columbia
Seasonal Activity
Adults fly February to April.
Additional species information
Species notes from the sources
Etymology: "It is named after its discoverer, George Spencer, the first entomology professor at the University of BC." -- University of BC Diptera page
About Flies: the wider group
Order-level background for Diptera, the group containing Cramptonomyia spenceri. Species-specific details appear above.
Group overview
Diptera includes over 150,000 described species of flies, mosquitoes, and midges. Mosquitoes are the deadliest animal on Earth (CDC). Malaria alone causes ~249 million cases and over 608,000 deaths annually, mostly children under 5 (WHO). Vector-borne diseases account for over 17% of all infectious diseases, causing 700,000+ deaths per year.
Ecological role of the group
Despite their disease impact, flies are critical decomposers and pollinators. Hoverflies alone pollinate hundreds of crop and wildflower species. Flies are also the primary food source for many birds, bats, and fish. Forensic entomology relies heavily on fly species for crime scene analysis.
Economic and practical significance of the group
In the U.S., vector-borne disease cases tripled between 2004-2016, with over 640,000 cases reported in that period (CDC). Tickborne diseases doubled from 22,000 to 48,000 annual reports. Globally, mosquito-borne diseases cost billions in healthcare and lost productivity.
Recorded sources for this group: WHO, CDC, PNAS. Imported estimates may describe particular regions or reporting periods.
Photos of Cramptonomyia spenceri (3)
Photo credits: Contributed by John F. Carr
Frequently Asked Questions About Cramptonomyia spenceri
How big is Cramptonomyia spenceri?
10-15 mm. The size in Arnett , 5-6 mm, is too small.
Where is Cramptonomyia spenceri found?
| Feature | Details |
|---|---|
| Habitat | Larvae live in rotten Red Alder. |
| Range | Coastal forests of Oregon, Washington, and British Columbia |
When is Cramptonomyia spenceri active?
Cramptonomyia spenceri: seasonal activity - Adults fly February to April..
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