 "P. tuberculatus" is one of the first two species of "Pseudarmadillo" described from the fossil record, the other species being "Pseudarmadillo cristatus".Both are known only from Dominican amber and were described in the same 1984 paper.The "Pseudarmadillo tuberculatus" specimens are moderately well preserved, though since isopods lack the wax coatings found in insects, they show deterioration and distortion from the resin after entombment.