Agromyza anthracina

The larvae mine the leaves of Common Nettle and other related host plants. The mine usually starts away from the leaf edge and has a coiled intestine like start; it has frass in long threads in the broader part of the mine. 

See the National Agromyzidae Recording Scheme website for further details of larva, adult insect and host plants

Agromyza pseudoreptans and Agromyza reptans (especially if the coiled start is located at the leaf edge).

(ref.: Warrington, B.P. (2023). Agromyza anthracina.  Accessed at https://agromyzidae.co.uk/species/agromyzidae/agromyzinae/agromyza/agromyza-anthracina-meigen-1830/ on 10/12/2023)

Leaf-mine Adult  

Provide backlit photographs of the whole leaf-mine in the leaf, and the larva, and note the host plant. 

Where Common Nettle occurs.

Click on the 'further details' link in the 'Description' section above.  Then click on the Phenology tab which will provide phenology details for both adult and larval stages.

Common

Warrington, B. P. 2022. A provisional review of the status of Agromyzidae in Great Britain & Northern Ireland

Status in Leicestershire and Rutland not known.