Themira minor


One of several, very similar Sepsidae species. Detailed examination is needed for safe species identification.

Identification difficulty
ID guidance
  • Supra-alar present.  
  • Humeral seta present.  
  • Sternopleurum white pruinose.  
  • Mesonotum and humeri glossy black.
Recording advice

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.


Common around water.

When to see it

May to September.

Life History

Known to breed in cow dung.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map