This is a list of the described species of the pseudoscorpion family Chthoniidae. Ascension is home to a remarkable pseudoscorpion fauna. The Empire Cave Pseudoscorpion (Fissilicreagris imperialis) is a species of arachnid in family Neobisiidae. Chelifer cancroides, the house pseudoscorpion, is a species of pseudoscorpions. This pseudoscorpion is about 4 millimeters long. Chelignathus is an extinct genus of pseudoscorpion in the family Tridenchthoniidae. Microbisium parvulum is a species of pseudoscorpion in the family Neobisiidae. Verrucaditha spinosa is a species of pseudoscorpion in the family Tridenchthoniidae. Titanatemnus is a pseudoscorpion genus of the Atemnidae. For pseudoscorpions, a Pseudoscorpion Recorders Group collects similar information. A new species of pseudoscorpion was found on the mouse, described, and named "Megachernes kanneliyensis". The following pseudoscorpion taxa (species, genera, or subgenera) have been named for Chamberlin.