Passage: The list follows McKenna and Bells Classification of Mammals for prehistoric genera (1997) and Wozencraft (2005) in Wilson and Reeders Mammal Species of the World for extant genera. The percrocutids are, in contrast to McKenna and Bell's classification, not included as a subfamily into the Hyaenidae, but as the separate family Percrocutidae (though they are generally grouped as sister-taxa to hyenas). Furthermore, the living brown hyena and its closest extinct relatives are not included in the genus Pachycrocuta, but in the genus Hyaena. The Protelinae (aardwolves) are not treated as a separate subfamily, but included in the Hyaeninae.

Question: what does the list follow
McKenna and Bells Classification of Mammals for prehistoric genera