Felidae (novel) been attempting to keep standard males from breeding with the special females, and killed them after they failed to comply. He also recalls that Pascal's owner idolizes Mendel, that Pascal offhandedly mentioned his owner's name being Ziebold, and that Pascal spoke of Felidae with yearning. Francis concludes that the murderer is Pascal, who really is Claudandus, and goes to confront him. He finds a program on the computer that catalogs the new breed's genetics and breeding, as well as the cats killed to keep from contaminating the lines. Claudandus reveals himself, explaining that he harbors a deep hatred towards humanity
Felidae based on phenotypical features: the Felinae, the Pantherinae, the Acinonychinae (cheetahs), the extinct Machairodontinae, and the extinct Proailurinae. Molecular phylogenetic analysis suggests that living (extant) felids fall into eight lineages (clades). The placement of the cheetah within the Puma lineage invalidates the traditional subfamily Acinonychinae, and recent sources use only two subfamilies for extant genera. The eight lineages divide between these as follows: The last four lineages are more related to each other than to any of the first four, so form a clade within the subfamily Felinae of family Felidae. The following is the complete list of genera within