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Hi Dodgydoug and Inopinatus,
The pocket guide to 'Freshwater Life' by Greenhalgh and Ovenden 2007 gives illustrations of the cases of 14 Limnephilus larvae. The only one depicted showing a structure anything like this one is Limnephilus rhombicus. It is exactly like the above while all the others are very different. Just wonder if any other Limnephilus share this design?
Ive since discovered at least 5 Limnephilus species use this case construction style- materials fastened across the tube at 90 degrees to the dwelling quarters.
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