A second species, Crichtonsaurus benxiensis, was named by Lü Junchang, Ji Qiang, Gao Yubo and Li Zhixin in 2007. The specific name refers to the Benxi Geological Museum. The holotype, BXGMV0012, was discovered in the same early Late Cretaceous-age (Cenomanian-Turonian) Sunjiawan Formation of Beipiao, Liaoning, as the type species. It consists of a complete skull. Additionally, specimen BXGMV0012-1 has been referred, a partial skeleton lacking the skull, found at the same location. Also, according to Arbour, a skeleton displayed at the Sihetun Fossil Museum under the name of C. bohlini, probably belongs to C. benxiensis. Paul suggested C. benxiensis were a junior synonym of C. bohlini. However, apart from indicating C. bohlini as a dubious species to which no other species can be justifiably seen as identical, Arbour established diagnostic differences between the shoulder blades of BXGMV0012-1 and LPM 101, so two ankylosaurid taxa seem to be present in the formation. Based upon her conclusion that C. bohlini was a nomen dubium, Arbour suggested a new generic name for the second species: Crichtonpelta, for the time being an invalid nomen ex dissertatione. However, in 2015, the name was validly published and it was officially separated from the dubious type species C. bohlini.
