Stan Larson was a former church-employed translator. He studied the life's work of the late BOM researcher Thomas Stuart Ferguson, and published a book on the subject titled "Quest for the Gold Plates." Speaking of the animal anachronisms within the BOM, Stan Larson wrote:
"Pre-Columbian Mayan hieroglyphs and ceramic art depict various mammals, such
as jaguars, tapirs, deer, monkeys, dogs, peccaries, coatimundis, armadillos,
rabbits, gophers, and leaf-nosed bats. The largest mammals alive in
Mesoamerica when the Europeans arrived were jaguars, pumas, tapirs, and
deer.....
Several species of horses existed in prehistoric America, including the
Pleistocene horse, 'equus scotti.' At least 130 individuals of 'Equus
occidentalis' were trapped in the La Brea tar pits. B. H. Roberts warned that
these Pleistocene finds at Rancho La Brea cannot be used to sustain the Book of
Mormon claim concerning horses, since there is 'positive and well nigh
universal testimony about the absence of the horse from America within historic
times.' More recently Bruce J. McFadden, curator of the Florida Museum of
Natural History at the University of Florida, stated that the extinction of the
horse in the Americas occurred about 11,000 years ago at the close of the
Pleistocene era. This is supported by fifteen good radiocarbon dates, with the
youngest being 10,370+- 350 years ago. The extinction of the horse before the
growth of civilization in Mesoamerica is also supported by the fact that no
depictions of the horse occur in any pre-Columbian art.....
It was an assumption by common people in early nineteenth-century America that
horses---as well as asses, oxen, cows, sheep, goats, and swine---were native to
America, though serious scholars were aware that these animals had been
imported by the Europeans. After surveying the most up-to-date evidence,
Deanne Matheny concluded that 'at this point then there is no convincing
evidence that the horse survived until the period of the Mesoamerican
civilizations.' B. H. Roberts referred to the difficulties of establishing the
existence of the horse in America during historic times as 'our embarrassing
problems.' The absence of support for the animals mentioned in the Book of
Mormon---at the same time as there exists clear evidence of what the
Mesoamerican animals actually were---constitutes a serious obstacle to
verifying the historicity of the Book of Mormon."
("Quest for the Gold Plates", pp. 184-194.)
To believe that the BOM is authentic, one has to believe that sometime between the first century A.D. and the European invasion of the 15th century, that somehow, all those animals mentioned in the BOM such as horses, cows, sheep, pigs, asses, etc., mysteriously disappeared, to be replaced by jaguars, tapirs, monkeys, etc., as Larson names---and that there is NOT A SINGLE TRACE LEFT OF THEIR EXISTENCE. No fossils, no carvings on stone stele, nothing.
So, which scenario is more likely? All trace of those animals mysteriously disappeared, or the BOM is fiction?
Old thread on this subject:
http://www.exmormon.org/mormon/mormon265.htm