Particularly none that were really suitable for transport. Good luck trading along the Andes with your turkey-carts. Another thing I seem to remember from that

Particularly none that were really suitable for transport. Good luck trading along the Andes with your turkey-carts. Another thing I seem to remember from that book is that we do have occasional evidence of various discoveries of the wheel in the Americas, it just never caught on due to lack of cart-pulling beasts. (skimmed the book: evidence of wheels in Mexico, but no Llamas north of the Darien gap) Besides, preindustrial transport did not happen anywhere on the scale required to transport bulk goods like base nutrients over the distance between latitudes of different biomes. Luxuries and spices, sure, but not basic foodstuff with low value per unit. Even the roman empire never really left their comfort zone of wheat-producing regions.