On that earlier occasion I summarized the situation in these words:
Above, the Wisent or European bison, below the Woodlands bison of North America. Some authorities maintain that the bison were Atlantean animals (James Churchward says this in the Lost Continent of Mu books) and the idea would be that they were woodlands bison as opposed to the bigger (and less hairy) steppe bisons of Eurasia. And in fact the American and European bison look more alike than either one actually looks like the Steppe bisons.The land bridges at the time would not have been continuous belts of land but they would be island chains that swimming animals could island-hop across.
The bison would be the sacred animals of Poseidon (or the original god that came to be called Poseidon in the Critias, I prefer to say Don or Adon=Atum)and kept in a special park in the center of the main city to be ritually hunted and sacrificed by the nobility. So the arrangement is rather like the King of England having an exclusive deer park and the deer would then be off-limits to commoners. This does bespeak of the bison in question being kept in captivity but does not necessarily that the Atlanteans kept cattle otherwise. Hence I thought it best to clarify the matter by posting the Cattle Out of Africa article first.
[BISON] Evolution and genetic historyThe bovine family (Taurids and Bisonids) diverged from the common ancestral line with Water Buffalo and African Buffalo about 5 to 10 million years ago. Thereafter, the family lineage of bison and taurine cattle does not appear to be a straight forward ‘tree’ structure as is often depicted in much evolution, because there is evidence of interbreeding and crossbreeding between different species and members within this family, even many millions of years after their ancestors separated into different species. This cross breeding was not sufficient to conflate the different species back together, but it has resulted in unexpected relationships between many members of this group, such as Yak being related to American Bison, when such relationships would otherwise not be apparent.
A 2003 study of mitochondrial DNA indicated four distinct maternal lineages in tribe Bovini:
 An earlier study using amplified fragment length polymorphism (AFLP) fingerprinting showed a close association of wisent and American bison and probably with yak, but noted that the interbreeding of Bovini species made determining relationships problematic.
The Steppe Bison (Bison priscus) diverged from the lineage that led to cattle (Bos taurus) approximately 2 to 5 million years ago. The Bison genus is clearly in the fossil record by 2 million years ago. The Steppe Bison spread across Eurasia and was the bison that was pictured in the ancient cave drawings of Spain and Southern France
The European Bison or Wisent arose from the Steppe Bison, without fossil evidence of other ancestral species between the Steppe Bison and the European Bison, though the European Bison might have arisen from the lineage that led to American Bison if that lineage backcrossed with the Steppe Bison. Again, the web of relationships is confusing, but there is some evidence that the European Bison is descended from bison that had migrated from Asia to North America, and then back to Europe, where they crossbred with existing Steppe Bison.
At one point, some Steppe Bison cross bred with the ancestors of the modern Yak. After that cross breeding, a population of Steppe Bison (Bison priscus) crossed the Bering Land Bridge to North America. There is evidence of multiple crossings of bison to and from Asia starting before 500,000 years ago and continuing until at least 220,000 years ago. The Steppe Bison spread through the northern parts of North America and Steppe Bison lived in Eurasia until approximately 11,000 years ago and North America until 4,000 to 8,000 years ago.
Bison latifrons (Giant Bison or Longhorn Bison) is thought to have evolved in midcontinent North America from Bison priscus, after the Steppe Bison crossed into North America. Giant Bison (Bison latifrons) appeared in the fossil record approximately 500,000 years ago. B. latifrons was one of many species of North American megafauna which became extinct during the transition from the Pleistocene to the Holocene epoch (an event referred to as the Quaternary extinction event). It is thought to have disappeared some 21,000–30,000 years ago, during the late Wisconsin glaciation.
The Bison latifrons (Giant Bison or Longhorn Bison) species was replaced by the smaller Bison antiquus. Bison antiquus appeared in the North American Fossil record approximately 250,000 years ago. Bison antiquus in turn evolved into the Bison occidentalis, then into the yet smaller Bison bison — the modern American bison — some 5,000 to 10,000 years ago. Some researchers consider Bison occidentalis to be a sub-species of Bison antiquus
 (today called "beefalo") Accidental crossings were also known to occur. Generally, male domestic bulls were crossed with buffalo cows, producing offspring of which only the females were fertile. The crossbred animals did not demonstrate any form of hybrid vigor, so the practice was abandoned. The proportion of cattle DNA that has been measured in introgressed individuals and bison herds today is typically quite low, ranging from 0.56 to 1.8%. In the United States, many ranchers are now utilizing DNA testing to cull the residual cattle genetics from their bison herds. The U.S. National Bison Association has adopted a code of ethics which prohibits its members from deliberately crossbreeding bison with any other species.
Some cattle breeds are intentionally bred with bison to produce, for instance, Beefalo hybrids. Wisent-American bison hybrids were briefly experimented with in Germany (and found to be fully fertile) and a herd of such animals is maintained in Russia all the time. A herd of cattle-wisent crossbreeds (Zubron) is maintained in Poland. First-generation crosses do not occur naturally, requiring caesarean delivery. First-generation males are infertile.
Possible causes of insular dwarfism
Factors influencing the extent of dwarfingFor both herbivores and carnivores, island size, the degree of island isolation and the size of the ancestral continental species appear not to be of major direct importance to the degree of dwarfing. However, when considering only the body masses of recent top herbivores and carnivores, and including data from both continental and island land masses, the body masses of the largest species in a land mass were found to scale to the size of the land mass, with slopes of about 0.5 log(body mass/kg) per log(land area/km2). There were separate regression lines for endothermic top predators, ectothermic top predators, endothermic top herbivores and (on the basis of limited data) ectothermic top herbivores, such that food intake was 7 to 24-fold higher for top herbivores than for top predators, and about the same for endotherms and ectotherms of the same trophic level (this leads to ectotherms being 5 to 16 times heavier than corresponding endotherms)
[Given the formula abve it is possible to estimate that from the degree of Island Dwarfing seen across the board in these animal examples, the land area of Atlantis must have been between 100,000 square km and 1 million square km, the next order of magnitude up.-DD]
And then you have your corresponding reduction of wild sheep and goats to their domesticated relatives. In both sheep and goats there are genetic distinctions which means they were LESS likely to have anything to do with the wild sheep and goats of Western and Central Asia: for example our domesticated sheep have the same number of chromosomes as the Rocky Mountain Bighorn sheep and NOT the same as the Urials and other Old World types. Atlantean cultural area (Meaning the Megalithic culture of Europe) seems in general associated with the "Moufflon" types of sheep.Modern Moufflons are not wild sheep but are early domesticated types gone feral, and the same is thought to be true of Bezoar goats in the mid-East.