Lion Subspecies

Traditionally, 12 recent subspecies of lion were recognised, distinguished by mane appearance, size, and distribution. Because these characteristics are very insignificant and show a high individual variability, most of these forms were probably not true subspecies, especially as they were often based upon zoo material of unknown origin that may have had "striking, but abnormal" morphological characteristics.[16] Today, only eight subspecies are usually accepted,[14][17] although one of these, the Cape lion, formerly described as Panthera leo melanochaita, is probably invalid.[17] Even the remaining seven subspecies might be too many. While the status of the Asiatic lion (P. l. persica) as a subspecies is generally accepted, the systematic relationships among African lions are still not completely resolved. Mitochondrial variation in living African lions seemed to be modest according to some newer studies, therefore all sub-Saharan lions sometimes have been considered a single subspecies. However, a recent study revealed lions from western and central Africa differ genetically from lions of southern or eastern Africa. According to this study, Western African lions are more closely related to Asian lions than to South or East African lions. These findings might be explained by a late Pleistocene extinction event of lions in western and central Africa and a subsequent recolonisation of these parts from Asia.[18] Previous studies, which were focused mainly on lions from eastern and southern parts of Africa, already showed these can be possibly divided in two main clades: one to the west of the Great Rift Valley and the other to the east. Lions from Tsavo in eastern Kenya are much closer genetically to lions in Transvaal (South Africa), than to those in the Aberdare Range in western Kenya.[19] Another study revealed there are three major types of lions, one North African–Asian, one southern African and one middle African.[20] Conversely, Per Christiansen found that using skull morphology allowed him to identify the subspecies krugeri, nubica, persica, and senegalensis, while there was overlap between bleyenberghi with senegalensis and krugeri. The Asiatic lion persica was the most distinctive, and the Cape lion had characteristics allying it more with P. l. persica than the other sub-Saharan lions. He had analysed 58 lion skulls in three European museums.[21]
By far most lions, which are kept in zoos are hybrids of different subspecies. About 77% of the captive lions registered by the International Species Information System are of unknown origin. Nonetheless, they might carry genes, which are extinct in the wild and might be therefore important to maintain overall genetic variability of the lion.[22] It is believed, that those lions, which were imported to Europe until the middle of the 19th century, were mainly Barbary lions from North Africa or lions from the Cape.