Xenolpium longiventer is a species of pseudoscorpion in the Olpiidae family. It is endemic to Australia. It was described in 1885 by German arachnologists Ludwig Carl Christian Koch and Eugen von Keyserling.[1]
The species occurs in Queensland, Tasmania and Victoria. The type locality is Peak Downs in Queensland's Central Highlands Region. The pseudoscorpions inhabit plant litter.[1]
The pseudoscorpions are terrestrial predators.[1]