heelwalker

noun1

1. •
   Any of the order Mantophasmatodea of carnivorous, wingless insects that superficially resemble a cross between praying mantises and phasmids.

   • The gladiator heelwalker (Tyrannophasma gladiator) is a ferocious nocturnal predator. It uses both front and middle legs to grab and crush its spider and insect prey. — 2007