 One classification was based on body types and conformation, suggesting the presence of four basic prototypes, labeled the "Tarpan", "Forest horse", Draft and "Oriental", each of which was hypothesized to have adapted to their environment prior to domestication.However, more recent studies suggest that all domesticated horses originated from a single wild species and that the different body types of horses were entirely a result of selective breeding after domestication, or possibly landrace adaptation.These were human-developed breeds which no longer exist.