Pseudoscorpions are minute arachnids which can be found in various habitats such as leaf
litter, under bark of trees, under stones, phoresy on other arthropods and etc. This finding of a
phoresy of the pseuoscorpion, withius nanus Mahnert, 1988, which was attached to the body
hairs of Goodwin’s brush-tailed mouse, Calomyscus elburzensis Goodwin, 1938, is the first
record of the family Calomyscidae from Iran. In the present study, the redescription,
measurements and illustrations of the species including the texts about its act of transporting
are given.
