: Strepsiptera.

The strepsipterans, or twisted-winged parasites, are possibly the most enigmatic of insect orders, and the relationship between these tiny, parasitic insects and the remaining insect orders has been debated for over a hundred years.

Strepsipterans Strepsiptera
Creative Commons Attribution | Hallvard Elven | Leif Aarvik | Natural History Museum, University of Oslo