![]() Hungry zebra is left behind to eat when the other animals go to select horns, story of the Ila-speaking people of northern Rhodesia/Zimbabwe (Smith and Dale 1920).Wild zebras hybridize with donkeys, commonly in some parts of Zimbabwe.Behavior and physical appearance a mix of both parents.Wild hybrid suspected between Grevy's and plains zebra, Laikipia, Kenya.Offspring typically sterile largely due to differences in chromosome number.Hybrid offspring commonly known as zedonks or zonkeys.Occurs among all zebras and between zebras and other equids.Hybridization in equids (from Duncan and Groves 2013 unless otherwise noted) Quagga extinction in 1883 (Duncan and Groves 2013).0.7 Mya (Steiner and Ryder 2011 Eisenmann 1992) 1.2 Mya genetic estimate supported by early fossil records that date to c. Plains zebra estimated to have evolved c.zebra ) split off earlier than Plains and Grevy's zebras Split between zebra and Asiatic wild asses occurred c.1.6 Mya.Closely allied with Asiatic wild asses (onager, E.Most closely related to one another suggested by recent genetic analysis.Modern distribution confined to the African continent (Duncan and Groves 2013).North American origin for zebras suggested by fossil remains, found in Rancho La Brea tar-pits (Willoughby 1974 Bennett 1980).Zebras (from Steiner and Ryder 2011 unless otherwise noted).Includes all living species in the equid family (Orlando et al.3-4.5 Mya widespread distribution throughout the northern hemisphere ![]() Evolutionary history (from Duncan and Groves 2013 Prothero 2013 unless otherwise noted).Zebras - plains, Grevy's, and mountain zebras.Asses - domestic donkey, African wild asses, and Asiatic wild asses.Caballines - domestic horse and the Asian Prezwalski's horse.3 extant/living lineages numerous earlier groups subsequently went extinct.Documents successive loss of side toes, an increase in the length of legs and feet, and enlargement of the skull.Closely related to tapirs (Family Tapiridae) and rhinoceroses (Rhinocerotidae).Earliest members date to c.54 million years ago (Mya).Evolutionary origin traced to North America.Family Equidae (from Duncan and Groves 2013 Groves 2013 unless otherwise noted)
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