is mostly a process of elimination. Both the pronotum and mesonotum are sclerotized, which would rule out phryganeids like Banksiola. (Also, phryganeids build spiral or stacked cases of plant material.) Aside from Limnephilidae, the other possibilities would seem to be Brachycentridae or Uenoidae. Although not entirely clear from the photo, this larva appears to have a dorsal hump on the 1st abdominal segment. Brachycentrids are humpless, and the gills, claws, and cases do not look like this. The mesonotum detail is not clear enough to detect the notches that would indicate Uenoidae, but the gills, legs, and head do not look like a uenoid larva to me.

The case certainly doesn't seem to match any other family, and since the larval characteristics agree, I'll go ahead and move it to Limnephilidae.