In his 1986 infrageneric classification of the genus Boletus, Rolf Singer placed C. calopus as the type species of the section Calopodes, which includes species characterised by having a whitish to yellowish flesh, bitter taste, and a blue staining reaction in the tube walls. Other species in section Calopodes include C. radicans, C. inedulis, B. peckii, and B. pallidus.
In his 1986 classification of the genus Boletus, Rolf Singer designated C. calopus as the type species for the Calopodes section, which includes other species with whitish to yellowish flesh, a bitter taste, and blue staining in their tube walls. These species are also included in the section: C. radicans, C. inedulis, B. peckii, and B. pallidus.