Felidae the Felidae, grouped according to the traditional phenotypical classification with the corresponding genotypical lineages indicated. It includes all of the currently living cat species. There is considerable variation in the taxonomy used for the wildcat. It used to be regarded as "Felis silvestris" with distinct subspecies "F. s. silvestris", "F. s. lybica" and "F. s. ornata" in Europe, Africa and Asia respectively. Since 2017, the IUCN Cat Specialist Group recognises "silvestris" and "lybica" as distinct species. The phylogenetic relationships of extant felids are shown in the following cladogram, based on the molecular phylogenetic analysis of Johnson et al. (2006). The
International scientific vocabulary root before another root or prefix that starts with a vowel, e.g. gastroenteritis; but elision happens in gastrectomy (not gastroectomy). The Greek word τέρας (τέρατο-) = "monster" is usually used to mean "monster (abnormal)" (e.g. teratology, teratogen), but some biological names use it to mean "monster (enormous)" (e.g. the extinct animals "Teratornis" (a condor with a 12-foot wingspan) and "Terataspis" (a trilobite 2 feet long)). International scientific vocabulary International scientific vocabulary (ISV) comprises scientific and specialized words whose language of origin may or may not be certain, but which are in current use in several modern languages (that is, translingually).