Centromerita bicolor


Size 3.0 to 3.5 mm. Carapace and legs unicolourous brown to dark brown. Male head with a number of forward directed spines, fewer in females. Abdomen brown to dark brown. If brown then the abdomen has the same colour as the carapace and legs. If dark brown then the abdomen is darker than the carapace and legs. 

Identification difficulty
ID guidance
  • Tibial spines: 2-2-2-2;
  • TmIV: no;
  • TmI: 0.40-0.53. 
Recording advice

Identification of this species requires microscopic examination of the genitalia of mature specimens. 


Occurs in a wide range of habitats, including grasslands, heathland, bog, hedgerows, wasteland and allotments, but perhaps especially in improved and disturbed grasslands and other places with areas of open ground. 

When to see it

All year. 

UK Status


VC55 Status


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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