Wikipedia
Coxoplectoptera
Coxoplectoptera or "chimera wings" is a primitive, extinct order of winged insects containing one family, Mickoleitiidae, discovered in 2007.
Two adult and more than 20 larval fossils of Mickoleitia have been scientifically described from Mesozoic outcrops, mainly from the Lower Cretaceous Crato Formation of Brazil (in total, around 40 fossil larvae have been found). Coxoplectoptera belong to the stem group of mayflies. Winged adults and the aquatic larvae were predators with raptorial forelegs, which are reminiscent to those of praying mantids. The larvae had a peculiar freshwater shrimp-like habitus.