| National Barkfly Recording Scheme (Britain and Ireland)  | 
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    Cerobasis guestfalica | 
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	  Species account | 
   
  
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    A small (c.1.5-2mm) apterous (wingless) barkfly.  Common in Britain and Ireland. | 
   
  
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    The species has an oval abdomen which has a  reddish-brown variable mottling on the upper side. | 
   
  
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    The species is readily distinguished by the characteristic  ‘anchor’ mark on the head. | 
   
 
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