Case bearing moth larva found on the underside of an elm in an old quarry
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Thank you for your identification. The photographs of C serralta on the British and European leafminer sites looked similar to mine, hence my identification.
Your notes state that the "shark fins along the back of the case and the rounded shape to the rear end" indicate C limosipennis, but the case of C serralta also has a serrated edge and rounded end, so what are the key differences I should be looking out for in future?
The serrations on your picture are typical of limosipennella, while the rear end is flattened and bivalved. Serratella does have serrations, but the rear end ids trivalved. Note the angle that the case is held with regard to the leaf - looks almost parallel here, serratlla has a steeper angle.
Thank you for this explanation. Can you also explain the references to bivalve and trivalve as I'm not sure what this refers to and how it shows up in the photograph?
The terms refer to the shape of the rear end of the cases. Trivalved is shown here for C.serratella (looks like the CND logo) -
bivalved - basically a straight line as if the sides of the case have been laterally compressed, as here -
Thanks. I will have a good look when I next see a "live" example.
Lat/Lng: 52.787825, -3.094253
OS grid ref: SJ262217