Taxonomy and Evolution
The snow leopard was first described by Schreber in 1775, in the Kopet-Dag Mountains in Turkmenistan and Iran. In the past, many taxonomists included the snow leopard in the genus Panthera, together with the other largest extant felids, but later it was placed in its own genus, Uncia. It was thought not to be closely related to the Panthera or other extant big cats. However, recent molecular studies place the species firmly within the genus Panthera, its closest relative being the tiger (Panthera tigris). MSW3 still refers to the snow leopard as Uncia uncia but the more recent IUCN classifies it as Panthera uncia. The Cat Classification Task Force, with the goal to propose on behalf of the Cat Specialist Group and the IUCN Red List Unit, and based on the best science and expert knowledge presently available, is currently working on an updated and practical classification of the Felidae, including genera, species and subspecies with the most likely distribution ranges of the respective taxa.
A few subspecies have been proposed for animals living in different geographical regions. With the possible exception of U. u. baikalensis-romanii, which requires further evaluation, these subspecies were generally not considered valid. The Handbook of the Mammals of the World recognizes two subspecies: U. u. uncia, from central Asia north-eastwards to Mongolia and Russia; and U. u. uncioides in western China and the Himalayas.
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“The more specific idea of evolution now reached isa change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.”
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