Equus dalianensis

Equus dalianensis is a true cabaline horse closely related to living domestic and wild horses, with a similar skeletal morphology to other true horses.^[4] It belonged to a distinctive mitochondrial genome lineage that is estimated to have diverged from those of living horses over 800,000 years ago, shortly after the divergence between North American and Old World horses. Some prehistoric Late Pleistocene horse remains assigned to Przewalski's horse also belong to this lineage, either indicating gene flow between the two species, or that these remains had been misassigned.^[1]

The exact evolutionary origins and history of this species is unclear despite the abundance of material for E. dalianensis. During the late Pleistocene extinctions and the warming of the Holocene epoch, Equus dalianensis became extinct while the range of Equus przewalskii shrank. The genetic diversity of the species seems to have been relatively low prior to its extinction.^[1]