The holotype and paratype of Biseridens were initially referred to Eotitanosuchia, a former suborder of therapsids that included various groups of early therapsids (although the range inclusion varied between authors). The genus was named from the Latin biseri- for double rows and -dens (teeth) to refer to the paired double rows of cheek teeth in each jaw, while the species was named after the Qilian mountains where the fossils were discovered. They also assigned Biseridens to a distinct new family of eotitanosuchians, the Biseridensidae, although they did not provide a diagnosis for this family outside of the genus itself.