These walkingstick-like, predatory hemipterans are found in slow-moving freshwater streams and ponds.
Their common name comes from the scorpion-like combination of raptorial front legs (looking somewhat like pedipalps) and paired, caudal half-tubes (looking somewhat like the telson), capable of being locked together to form a siphon.
These predators feed on aquatic insects and crustaceans, grabbing them with their raptorial forelegs and feeding on their body fluids using their short sharp beak.
They may bite when handled.
Ancestors of this species exceeded 5′ in length.
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