Myotragus of the island of Majorca ("Myotragus pepgonellae") indicate that "Myotragus balearicus", in spite of being a browsing animal, descended originally from grazers. The closest related species to "Myotragus" are ovine, such as the extinct "Nesogoral" of the Plio-Pleistocene of Sardinia, the old "Gallogoral" of France (possible mainland ancestor of both "Myotragus" and "Nesogoral"), "Ovis" (present sheep and mouflon) and the mountain goats of Central Asia. The last ancestor common to "Myotragus" and "Nesogoral" arrived at Majorca and Sardinia around 6 million years ago, a time at which the Straits of Gibraltar were closed and the Mediterranean Sea was a small
Ovine pulmonary adenocarcinoma of lung fluid produced by the affected lung tissue; lifting the hind legs of the animal above the level of its head will cause large volumes of this fluid to flow from the nostrils. There are no reliable tests for the diagnosis of OPA in live animals which are suitable for use on farms, so diagnosis can only be confirmed at necropsy (post-mortem examination). On necropsy, lungs are interspersed with multifocal tumors. Some of these are small discrete nodules and others will involve the entire half of a lung lobule. JSRV acutely transforms the lung epithelia into cancerous cells, with