Hymenoptera in cocoon ?

Hymenoptera in cocoon ?

Observation - Hymenoptera in cocoon ?. Description: This 'cocoon' turned up in a freshwater sample from a wet woodland pond in East Dorset, although it seems likely to have been knocked in from surrounding vegetation.

This 'cocoon' turned up in a freshwater sample from a wet woodland pond in East Dorset, although it seems likely to have been knocked in from surrounding vegetation.