Hydropsychid caddis larvae have hardened (sclerotised) plates on each of the 3 thoracic segments, and gill tufts under the abdomen. Diplectrona caddis larvae have a more “hairy” appearance than the related Aoteapsyche, and they have 7 sets of abdominal like gills (like Aoteapsyche). In Diplectrona the foreleg trochantin (segment at the base of the leg) has a spine that is not forked, unlike Aoteapsyche.
Diplectrona larvae are mostly found in bush covered streams in the lower North Island and the South Island.
They construct filter-feeding nets attached to the streambed to trap drifting particulate food items.
Diplectrona larvae are most likely to be found in streams with good water quality. They have a tolerance value of 9 for hard bottom sites (there is no soft bottom tolerance value).