What is "maronesa"

Maronesa is a primitive cattle breed from the Trás-os-Montes region in Portugal, which closely resembles the extinct aurochs, the wild ancestor of domestic cattle, in several features. Its name comes from Mountains in Portugal, Serra do Marão, which rise to approximately 4648 feet (1415m). Genetic evidence suggests that it is very different from other Iberian cattle and consequently is not a crossbreed of other breeds like Barrosa Cattle or Mirandesa.