Trixoscelis polita
This record describes Trixoscelis polita (species). Recorded family: Heleomyzidae. Recorded order: Diptera.
Identification and Appearance

This species is easily distinguished from the closely related T. ornata by the shiny, dark brown abdomen and the rather uniformly gray thorax. (Foster and Mathis 2012)
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Diptera (Flies)
- Superfamily
- Sphaeroceroidea
- Family
- Heleomyzidae
- Subfamily
- Suilliinae
- Genus
- Trixoscelis
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Southwest: Central Texas to southern California; Baja California and Sonora
About Flies: the wider group
Order-level background for Diptera, the group containing Trixoscelis polita. 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 Trixoscelis polita (3)
Photo credits: Contributed by john and jane balaban; Additional contributions by Vox Sciurorum
Frequently Asked Questions About Trixoscelis polita
What is Trixoscelis polita?
Trixoscelis polita is a species in the family Heleomyzidae, within the order Diptera.
How do you identify Trixoscelis polita?
This species is easily distinguished from the closely related T. ornata by the shiny, dark brown abdomen and the rather uniformly gray thorax. (Foster and Mathis 2012)
Where is Trixoscelis polita found?
Range: Southwest: Central Texas to southern California; Baja California and Sonora
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