History of the horse in the Indian subcontinent "The occurrence of true horse ("Equus caballus" L.) was evidenced by the enamel pattern of the upper and lower cheek and teeth and by the size and form of incisors and phalanges (toe bones).". However, archaeologists like Meadow (1997) disagree, on the grounds that the remains of the "Equus ferus caballus" horse are difficult to distinguish from other equid species such as "Equus asinus" (donkeys) or "Equus hemionus" (onagers). An alleged clay model of a horse has been found in Mohenjo-Daro and an alleged horse figurine in Periano Ghundai in the Indus Valley. Trautmann (1982) thus remarked the supply and
Equus conversidens New Mexico, Oklahoma, Kansas and Florida, synonymizing "Equus francisci", "Equus tau", "E. littoralis", "E. achates", and "E. barcenaei" with "E. conversidens". However, Winans (1985) and MacFadden (1992) challenged the validity of "E. conversidens" due to its minimal diagnostic value, and treated "E. francisci" as valid. Subsequent study confirmed the "nomen dubium" status of "E. conversidens" because the holotype was undiagnostic besides its small size. Equus conversidens Equus conversidens (Owen 1869), or the Mexican horse, is a dubious Pleistocene species of horse, now extinct, that inhabited North America. The holotype of "Equus conversidens", a partial palate, was unearthed in Pleistocene deposits